Tong Qiao Huo Xue Teapills Tong Qiao Huo Xue Wan [Discontinued] by Plum Flower Brand

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Amenorrhea. Although there has been interest in using oral Angelica archangelica for amenorrhea, there is insufficient reliable information about the clinical effects of Angelica archangelica for this condition.
• Anxiety. Although there has been interest in using oral Angelica archangelica for anxiety, there is insufficient reliable information about the clinical effects of Angelica archangelica for this condition.
• Cognitive impairment. Oral Angelica archangelica has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: In patients aged 65-85 years with mild cognitive impairment, taking Angelica archangelica extract 20 mg combined with ferulic acid 100 mg (Feru-Guard, Glovia Co. Ltd.) twice daily for 24 weeks improves scores on the Mini-Mental State Examination when compared with placebo (106409).
• Cough. Although there has been interest in using oral Angelica archangelica for cough, there is insufficient reliable information about the clinical effects of Angelica archangelica for this condition.
• Dementia. Although there has been interest in using oral Angelica archangelica for dementia, there is insufficient reliable information about the clinical effects of Angelica archangelica for this condition.
• Dyspepsia. Oral Angelica archangelica has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A specific combination product (Iberogast, Medical Futures, Inc) containing Angelica archangelica root, peppermint leaf, clown's mustard plant, German chamomile flowers, caraway fruit, licorice root, milk thistle fruit, celandine herb, and lemon balm leaves seems to improve symptoms of dyspepsia. A meta-analysis of studies using this combination shows that taking 1 mL orally three times daily for 4 weeks reduces the severity of acid reflux, epigastric pain, cramping, nausea, and vomiting when compared with placebo (13089).
• Flatulence. Although there has been interest in using oral Angelica archangelica for flatulence, there is insufficient reliable information about the clinical effects of Angelica archangelica for this purpose.
• Insomnia. Although there has been interest in using oral Angelica archangelica for insomnia, there is insufficient reliable information about the clinical effects of Angelica archangelica for this condition.
• Nocturia. It is unclear if oral Angelica archangelica is beneficial in patients with nocturia. Details: Clinical research shows that taking a specific Angelica archangelica leaf extract (SagaPro, SagaMedica) 2 tablets daily for 8 weeks does not improve overall nocturia symptoms, including the number of overnight voids or the volume of urine. However, in individuals with a decreased bladder capacity, the number of voids per hour decreases by 43%, compared to 26% with placebo (92461).
• Rheumatoid arthritis (RA). Although there has been interest in using oral Angelica archangelica for RA, there is insufficient reliable information about the clinical effects of Angelica archangelica for this condition.
• Smoking cessation. It is unclear if inhaling the aroma of Angelica archangelica root essential oil is beneficial for people wanting to stop use of tobacco. Details: Preliminary clinical research in patients addicted to dipping, chewing, or smoking tobacco shows that placing a drop of Angelica archangelica root essential oil on tissue paper and inhaling for 2 minutes at least three times a day for 3 days reduces nicotine cravings when compared with baseline (90502). The validity of these results is limited by the lack of a comparator group.
• Stroke. Although there has been interest in using oral Angelica archangelica for stroke, there is insufficient reliable information about the clinical effects of Angelica archangelica for this condition. More evidence is needed to rate Angelica archangelica for these uses.

(Read more about ANGELICA ARCHANGELICA)

There is insufficient reliable information available about the effectiveness of calamus.

(Read more about CALAMUS)

POSSIBLY EFFECTIVE

• Dysmenorrhea. In people with dysmenorrhea, taking oral ginger seems to reduce pain. Clinical research shows that ginger might be comparable to ibuprofen or mefenamic acid. In addition, taking ginger seems to be beneficial when used as an adjunct to mefenamic acid 250 mg twice daily. Details: Clinical research in individuals at least 15 years of age shows that ginger can reduce pain from dysmenorrhea. Clinical studies show that taking ginger powder 500-2000 mg daily usually for the first 3-4 days of a menstrual cycle modestly decreases pain severity by an average of 2.3-2.7 points on a 10-point scale when compared to control groups (89889,89899,91139,91892,96255,106077). However, a meta-analysis of clinical research shows that taking ginger does not reduce pain duration when compared with placebo (106077). Clinical research also shows that ginger might be as effective as some anti-inflammatory agents. Taking a specific ginger extract (Zintoma, Goldaru) 250 mg four times daily for 3 days at the beginning of the menstrual period or until pain relief improves symptoms similarly to ibuprofen or mefenamic acid (17931,96259,106077). Also, taking a ginger extract 200 mg four times daily for 3-4 days at the beginning of pain is equally effective to taking Novafen, a combination of acetaminophen, caffeine, and ibuprofen (99444). Ginger also seems to improve pain when given as an adjunct to anti-inflammatory agents. A small clinical study in young females with dysmenorrhea shows that adding ginger (Vomigone, Dineh Co.) 500 mg daily to mefenamic acid 250 mg twice daily for 5 days further reduces pain when compared with taking mefenamic acid alone (102464).
• Osteoarthritis. Most clinical research shows that taking ginger extract by mouth improves pain in some patients with osteoarthritis. Topical ginger, on the other hand, has not shown benefit for knee osteoarthritis in low quality research. Details: Meta-analyses of clinical research show that taking ginger extract 500-1000 mg daily for 3-12 weeks can modestly improve pain when compared with placebo in some patients with osteoarthritis of the knee or hip (96253,103357). However, a meta-analysis of two clinical studies shows that taking ginger extract about 500 mg daily for 6 weeks does not have an effect on function (103357). Some clinical research has also compared ginger to conventional drug treatment. In one clinical trial, there was no significant difference between ginger extract 30 mg daily and ibuprofen 400 mg three times daily for one month in patients with osteoarthritis of the hip or knee (17930). However, taking a specific ginger extract (Eurovita Extract 33; EV ext-33) orally 170 mg three times daily for 3 weeks was significantly less effective than ibuprofen 400 mg three times daily for reducing pain (7048). Since ginger is thought to take several weeks for significant benefit, this trial might not have lasted long enough. Ginger has also been compared with diclofenac. When used orally as 1500 mg daily in two divided doses, ginger is less effective than oral diclofenac 100 mg daily in two divided doses, or the combination of ginger and diclofenac, for 12 weeks (89898). Various studies have evaluated formulations containing ginger with other ingredients. These combinations have all been shown to improve osteoarthritis pain, and in some cases, functionality. Studied formulations include ginger (Eurovita Extract 35; EV ext-35) 340 mg with glucosamine (Zinaxin glucosamine, Ferrosan AS) 1000 mg daily for 4 weeks, a ginger extract with an alpinia (Alpinia galanga) extract (Eurovita Extract 77; EV ext-77) 255 mg twice daily for 6 weeks, a ginger extract with curcuminoids, and extracts of devil's claw, Boswellia serrata, and celery (Tregocel) for 36 weeks, or Ayurvedic shunthi-guduchi formulations containing ginger, Indian gooseberry, and Tinospora cordifolia, either with or without Boswellia serrata (7084,18210,89557,106078). However, it's too early to know if the effects of these combination agents are associated with ginger or other ingredients in the formulations. Topical ginger, alone or in combination with other ingredients, has also been studied for knee osteoarthritis. Although a meta-analysis of two randomized clinical trials shows no evidence of benefit of topical ginger for pain and disability when compared with placebo or standard therapy (103357), some benefits have been shown in individual preliminary studies (20340,20341,89897,96668,97537,97542). These trials have used a specific gel containing ginger and plai 4% by weight (Plygersic gel, Thailand Institute of Scientific and Technological Research) 4 grams/day in four divided doses for 6 weeks (89897), an ointment composed of ginger, cinnamon, mastic (Saghez), and sesame oil twice daily for 6 weeks (20340), or one gram of ginger extract 5% (standardized to 11.18% of 6-gingerol) in a nanostructure lipid carrier three times daily for up to 12 weeks to the affected knee (96668,97537). Some studies have used ginger essential oil in a massage oil, alone or with sweet orange essential oil or standard therapy, twice weekly for 3 or 6 weeks (20341,97542).
• Pregnancy-induced nausea and vomiting. Oral ginger seems to reduce the severity of nausea and vomiting in some people during pregnancy. Ginger seems to be more effective than placebo, comparable to vitamin B6 or dimenhydrinate, and less effective than metoclopramide. Details: Although most clinical studies are small and have methodological limitations, the available research shows that ginger is more effective than placebo, and comparable to vitamin B6 or dimenhydrinate (721,1922,5343,11346,13071,16306,20312,20315,90103,91201,102462). Although ginger is comparable to dimenhydrinate for reducing symptoms of morning sickness, it seems to take about 3 days to reduce vomiting episodes compared to 1 day with dimenhydrinate (16305). In addition, clinical research shows that ginger is less effective than metoclopramide at relieving nausea and vomiting associated with pregnancy (20315). Ginger doses of 500 to 2500 mg daily, divided into two to four daily doses for 3 days to 3 weeks, have been used in clinical research (721,5343,16305,16306,20312,20315,90103,91201).

POSSIBLY INEFFECTIVE

• Exercise-induced muscle soreness. Most research shows that oral ginger in single or multiple doses does not prevent or treat exercise-induced muscle soreness. Details: Two small studies in healthy adults show that single doses of ginger supplements do not seem to reduce muscle soreness from exercise. Taking capsules of ground ginger 2 grams, 30 minutes before a 30-minute cycling bout, or 24-48 hours after eccentric exercise, does not reduce muscle pain during exercise or within one hour of ingestion when compared with placebo (17932,17934). Taking multiple doses also does not seem to help. One small study in healthy adults shows that taking capsules with ginger powder 4 grams daily for 5 days before high-intensity eccentric exercise does not reduce muscle soreness over 4 days when compared with placebo (96258). Another small study in healthy adults shows that taking capsules of heated or raw ground ginger 2 grams daily for 8 days prior to eccentric exercise, and continuing supplementation for 3 more days, might modestly reduce muscle soreness 24 hours post-exercise, but not at later time points, when compared with placebo (17933,96258). Ginger has also been tested in combination with other ingredients. One small study in healthy adults shows that taking a specific combination product (ReWin(d), Natural Origins) containing a 4:3 ratio of ginger and annatto powder, 2 grams in divided doses daily for 4 weeks before eccentric exercise and continuing for 3 days after exercise, may modestly reduce muscle pain 48 hours after exercise but not at other time points (105057). This study was funded by the supplement manufacturer.
• Motion sickness. Most research shows that oral ginger does not prevent or treat motion sickness. Details: Most clinical research shows that taking ginger 500-1000 mg up to 4 hours prior to travel does not prevent motion sickness (7624,7625,20330,20331). Some patients report subjective feelings of improvement, but in many studies objective measures did not significantly improve (7400). However, one clinical trial suggests that ginger is more effective than dimenhydrinate at reducing gastrointestinal distress associated with motion sickness (20332). Another clinical study seems to show that taking ginger 1-2 grams as a single dose reduces nausea severity and increases the latency before the onset of nausea caused by simulated motion sickness when compared to baseline (20333). The validity of this finding is limited by the lack of a comparator group.

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Acute respiratory distress syndrome (ARDS). Some small clinical studies show that giving ginger with tube feeds to hospitalized patients might reduce the duration of serious sequelae from ARDS. Details: A small clinical trial in adults with ARDS shows that administering ginger extract 120 mg in three divided doses daily via nasogastric tubing for 21 days increases the number of ventilator-free days and the amount of feeding tolerated and decreases the number of intensive care unit (ICU) days when compared with placebo. However, it does not seem to improve overall mortality (20343). Also, another small clinical study shows that adding ginger extract 120 mg to tube feeds in three divided doses daily for 8-21 days improves blood oxygen levels by 13% to 20%, as well as the ability of the lungs to expand by 17%, when compared with a coconut oil placebo. The duration of mechanical ventilation and stay in the ICU also improved. However, ginger does not affect other measurements of lung function or physical organ damage in these patients (89886).
• Allergic rhinitis (hay fever). It is unclear if oral ginger is beneficial in allergic rhinitis. Details: A small clinical trial shows that taking ginger extract 500 mg daily for 6 weeks is as effective as loratadine 10 mg daily for reducing nasal symptoms of allergic rhinitis (103359).
• Antiretroviral-induced nausea and vomiting. Oral ginger seems to improve nausea and vomiting in patients using antiretroviral agents. Details: A small clinical study in patients with HIV shows that taking ginger 0.5 grams twice daily, 30 minutes prior to each dose of antiretroviral for 14 days, reduces the relative likelihood of nausea and vomiting by about 63% and 79%, respectively, when compared with placebo (89887).
• Asthma. Although there has been interest in using oral ginger for asthma, there is insufficient reliable information about the clinical effects of ginger for this condition.
• Back pain. Although there has been interest in using oral ginger for back pain, there is insufficient reliable information about the clinical effects of ginger for this condition.
• Burns. Although there has been interest in using topical ginger for burns, there is insufficient reliable information about the clinical effects of ginger for this condition.
• Cancer-related anorexia. It is unclear if oral ginger improves appetite in people with cancer-related anorexia. Details: A small clinical study in patients with cancer-related anorexia and cachexia shows that taking a capsule containing ginger 1650 mg daily for 14 days improves nausea, appetite, reflux, dysmotility, and other gastrointestinal symptoms when compared to baseline (102460). The validity of these findings is limited by the lack of comparator group.
• Chemotherapy-induced nausea and vomiting (CINV). Most clinical research shows that oral ginger does not reduce acute or delayed CINV. The effect of ginger might depend on the dose, the other antiemetics used, or the specific chemotherapy regimen. Details: Most clinical research shows that taking ginger as adjunct to adequate antiemetic therapy does not reduce DELAYED CINV when compared with antiemetic therapy alone (20316,96260,89891,96675,97538,97541,101760,102461). Clinical research from meta-analyses and most individual clinical studies also show that taking ginger 0.5-3.5 grams as an adjunct to standard antiemetic therapy does not reduce the incidence or severity of ACUTE CINV when compared with antiemetic therapy alone (89891,96675,101760,102461,102466). However, conflicting results exist from some individual clinical studies (20316,102466). These individual studies evaluated powdered ginger root or liquid extract of ginger root 0.5-2 grams taken in two to four divided doses daily, starting on either the day of or 3 days before chemotherapy and continuing for 3-5 days after chemotherapy initiation (20316,102466). Also, one small study shows that ginger in doses of 1 gram or less for more than 3 days reduces the likelihood of acute vomiting by 60% (101760). More research is needed to confirm the efficacy of this lower dose. Reasons for the conflicting results are unclear, but several theories have been postulated. One theory is that ginger might help reduce CINV associated with some, but not all, chemotherapy regimens. One preliminary clinical study shows that ginger 500 mg twice daily for 3 days reduces vomiting in patients receiving cyclophosphamide and doxorubicin, but not in patients also receiving 5-fluorouracil or docetaxel (96251). However, since there is limited evidence supporting this theory, additional research is needed to confirm. Another theory is that ginger helps when used with certain antiemetic drugs, but not others. For example, ginger seems to help in cases when optimal antiemetic therapy, such as 5-HT3 receptor antagonists, is not available. Small clinical studies show that ginger reduces the severity of acute nausea when compared with prochlorperazine or metoclopramide, both of which are suboptimal antiemetic therapy for CINV (89891). Another small study shows that ginger is comparable to metoclopramide for improving delayed chemotherapy-induced nausea (13244). On the other hand, several studies show that taking ginger 0.5-2 grams daily along with antiemetic therapy that includes aprepitant does NOT improve acute or delayed CINV (20318,89891,96251,96675). In fact, one study found an association between concomitant use of ginger 2 grams daily with aprepitant and worsened severity of delayed nausea. Ginger is hypothesized to decrease the absorption of aprepitant and reduce its effectiveness for delayed nausea (20318,96675). However, this effect has not been replicated, and aprepitant serum levels were not measured to confirm this hypothesis. Finally, many of the studies showing a benefit of ginger for CINV when used as an adjunct to standard antiemetic therapy are considered to be methodologically flawed (20317,96252,96677). For instance, one study using powdered ginger root 1-2 grams daily during the first three days of chemotherapy in children and adults (20317) has been criticized for inaccurately representing data (89891). Other studies of ginger 500 mg twice daily for up to 10 days used questionable methods to measure outcomes and usually did not differentiate between acute and delayed CINV (96252,96677). Ginger essential oil aromatherapy has also been evaluated. One small study shows that using two drops of ginger essential oil on an aromatherapy necklace for 2 minutes daily for 5 days, starting on the first day of chemotherapy, reduces acute nausea, but not vomiting or delayed nausea, when compared with placebo in females with breast cancer taking standard antiemetics including granisetron, dexamethasone, and metoclopramide (96256).
• Chronic obstructive pulmonary disease (COPD). Oral ginger has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Clinical research shows that taking two capsules of a specific combination product (AKL1, AKL International Ltd.) containing ginkgo extract, ginger, and Picrorhiza kurroa twice daily for 8 weeks does not improve respiratory symptoms when compared with placebo in patients with COPD (89702). Another moderate-sized clinical study in adults with COPD shows that taking a combination product containing extracts of ginger, alpinia, cardamom, cinnamon, and saffron in honey 3 times daily for 8 weeks improves confidence in leaving home and the ratio of forced exploratory volume per second to forced vital capacity of the lungs (FEV1/FVC) when compared with placebo. However, the combination product does not improve most measures of respiratory function or symptoms such as cough, phlegm, chest tightness, dyspnea, reduced energy levels, sleeping disorders, or activity limitations when compared with placebo (111542). It is unclear if these effects are due to ginger, other ingredients, or the combination.
• Colic. Although there has been interest in using oral ginger for colic, there is insufficient reliable information about the clinical effects of ginger for this condition.
• Constipation. Although there has been interest in using oral ginger for constipation, there is insufficient reliable information about the clinical effects of ginger for this condition.
• Coronavirus disease 2019 (COVID-19). It is unclear whether oral ginger is beneficial for patients with COVID-19. Details: Clinical research in adults hospitalized with asymptomatic COVID-19 infection shows that taking ginger 1.5 grams twice daily orally until hospital discharge reduces length of stay from around 8.5 days to 6 days, when compared with placebo. The strongest effect is seen in males over 60 years of age (110005). The relevance of these results is reduced by a lack of blinding, and the fact that the subjects were initially asymptomatic. The efficacy of ginger for treating COVID-19 has also been evaluated in combination with other ingredients. In adults with uncomplicated, moderate COVID-19, taking a combination of ginger, turmeric, ashwagandha, and boswellia (BV-4051, Artovid-20), 1776 mg twice daily orally for 14 days in addition to standard care and starting 48-96 hours after symptom onset, reduces the mean duration of symptoms from about 8 days to 7 days, when compared with placebo (109899). A small open-label study in adults with confirmed mild to moderate COVID-19 shows that taking ginger 1000 mg and ashwagandha 500 mg twice daily for 15 days, along with conventional therapy, leads to a 13.8-fold and 2.6-fold increase in the relative rate of clinical cure at 7 days and 15 days, respectively, when compared with conventional therapy alone. Taking this combination also appears to reduce time to recovery by around 6 days but does not improve the rate of negative COVID-19 tests, chest imaging findings, viral clearance, serum antibodies, or other measures of disease progression when compared with conventional therapy alone (112094). The validity of these findings is limited by a lack of blinding, and the study may have been inadequately powered to detect a difference between groups. Additionally, it is unclear if these effects are due to ginger, ashwagandha, or the combination.
• Diabetes. Some preliminary clinical studies suggest that oral ginger might have a small beneficial effect on glycemic control in patients with type 2 diabetes or gestational diabetes. Details: Meta-analyses of several small clinical trials in adults with type 2 diabetes show that taking ginger 1200-3000 mg daily for 8-13 weeks reduces glycated hemoglobin (HbA1c) by around 0.6% to 1% and fasting blood glucose by 19-21 mg/dL when compared with placebo (96680,107898). Additionally, a small clinical study in adults with diabetes on hemodialysis for end stage renal disease shows that taking ginger powder 2000 mg daily for 8 weeks reduces fasting blood glucose and measures of insulin resistance, but not serum insulin levels, when compared with placebo (111543). In patients with gestational diabetes at weeks 24-28 of pregnancy, clinical research shows that taking ginger 1500 mg daily in three divided doses for 6 weeks reduces fasting blood glucose, insulin levels, and measures of insulin resistance by a small amount when compared with placebo, with no effect on postprandial glucose levels (103358).
• Diarrhea. Although there has been interest in using oral ginger for various types of diarrhea, including cholera and acute bacterial dysentery, there is insufficient reliable information about the clinical effects of ginger for these conditions.
• Dry mouth. It is unclear if rinsing the mouth with ginger extract is beneficial for dry mouth. Details: In patients with dry mouth related to type 2 diabetes, clinical research shows that use of a ginger extract 25% mouthwash 20 mL three times daily for 14 days modestly reduces symptoms of dry mouth when compared with rinsing with a saline control mouthwash (106068). Although this study was indicated as being triple-blind, it is unclear how the taste of ginger was masked.
• Dyspepsia. It is unclear if oral ginger is beneficial for dyspepsia. Details: In patients with dyspepsia, a small clinical trial shows that a single dose of ginger root powder 1.2 grams, taken 1 hour prior to eating, does not reduce abdominal discomfort when compared with placebo. However, it increases the rate of gastric emptying (20325).
• Erectile dysfunction (ED). It is unclear if oral ginger is beneficial for erectile dysfunction. Details: Preliminary clinical research in middle-aged males with ED shows that taking two capsules of a specific combination product (Revactin, MD Concepts LLC) containing ginger root 250 mg, muira puama 250 mg, guarana 250 mg, and L-citrulline 800 mg twice daily for 3 months improves scores related to erectile function and intercourse satisfaction, but does not improve sexual desire or orgasmic function scores, when compared to baseline (103224). This study is limited by the lack of a placebo control, the use of per-protocol analysis, and a high dropout rate. In fact, 44% of patients withdrew in order to resume use of phosphodiesterase type 5 (PDE5) inhibitors. Further, it is unclear if these effects are due to ginger, other ingredients, or the combination.
• Gastroenteritis-associated nausea and vomiting. It is unclear if oral ginger is beneficial for children with gastroenteritis-associated vomiting. Details: In children aged 1-10 years with acute gastroenteritis-associated vomiting, clinical research shows that taking a single dose of ginger reduces the risk of vomiting at least once in the subsequent 8 hours by 20% when compared with placebo. The incidence of vomiting over the next 24 and 48 hours was also modestly reduced. The children were given 20 drops of ginger equivalent to 10 mg immediately, followed by every 8 hours until cessation of vomiting. All children were offered hypotonic oral rehydration solution (ORS) 30 minutes after the first dose (106076). The number of children accepting ORS, and the quantity of ORS consumed, was less in the group receiving placebo. It is unclear if this affected the outcomes of this study. Also, the incidence or severity of nausea was not investigated.
• Hangover. It is unclear if oral ginger is beneficial for managing symptoms of hangover. Details: Preliminary clinical research shows that use of a decoction containing a combination of ginger 6 grams, pith of Citrus tangerine 3 grams, and brown sugar decreases symptoms of alcohol hangovers, including nausea, vomiting, and diarrhea, when compared with placebo. The decoction was taken once 5 hours prior to drinking alcohol or four times after drinking alcohol (20320).
• Hyperlipidemia. Oral ginger may be modestly beneficial for some patients with hyperlipidemia. Details: A meta-analysis of preliminary clinical research in adults with and without hyperlipidemia shows that taking ginger 200-3000 mg orally daily for 2-24 weeks reduces triglyceride and low-density lipoprotein cholesterol levels by 12 mg/dL and 5 mg/dL, respectively, and increases high-density lipoprotein cholesterol levels by 1 mg/dL when compared with placebo (109521). However, the validity of this study is limited by high heterogeneity. A clinical study in adults with hyperlipidemia shows that taking ginger powder 1 gram three times daily for 45 days reduces triglyceride and cholesterol levels by an additional 36% and 90%, respectively, when compared with placebo (20327).
• Hypertension. It is unclear if oral ginger is beneficial for lowering blood pressure. Details: A preliminary clinical study in patients with diabetes and elevated systolic blood pressure shows that drinking black tea containing ginger 3 grams three times daily for 8 weeks does not reduce blood pressure by a clinically significant amount when compared with plain black tea (96669).
• Hypothyroidism. It is unclear if oral ginger is beneficial in patients with hypothyroidism. Details: A small clinical study in patients with primary hypothyroidism who are stabilized on thyroid hormone therapy shows that taking ginger powder 500 mg twice daily for 30 days improves symptoms associated with hypothyroidism, including cold intolerance, constipation, dizziness, dry skin, weight gain, and concentration and memory issues, when compared with placebo. However, ginger supplementation does not seem to improve hair loss, hearing, nail fragility, speech, or feelings of depression in these patients (107903).
• Insect bite. It is unclear if topical ginger is beneficial for reducing the size of insect bites. Details: Preliminary clinical research shows that a topical application of Trikatu, which contains ginger, long pepper, and black pepper extracts with 0.074% piperine and 0.046% gingerol, does not reduce the papule size associated with mosquito bites when compared with a control compound containing the same base ingredients of camphor 2%, menthol 2%, and eucalyptus oil 4% (89893).
• Intraoperative nausea and vomiting (IONV). It is unclear if oral ginger is beneficial for preventing IONV. Details: Clinical research in individuals undergoing elective C-section and receiving cimetidine and metoclopramide, shows that taking ginger 1 gram orally 30 minutes prior to anesthesia reduces the number of episodes of intraoperative nausea, but not vomiting, when compared with placebo (89890). In other clinical research in adults undergoing elective surgical procedures, adding ginger to a high calorie drink consumed pre-operatively reduces the incidence of nausea from 40% to 10%, and the incidence of vomiting from 25% to 10% when compared with the high calorie drink alone (110007). The validity of these results is unclear as only patients were blinded to the treatment group.
• Irritable bowel syndrome (IBS). Oral ginger might reduce symptoms of IBS when used in combination with other ingredients; its effect when used alone is unclear. Details: A small clinical trial shows that taking ginger 1-2 grams daily for 28 days does not improve symptoms or the number of responders when compared with placebo (90102). However, some research shows that ginger might be beneficial in some patients when used along with other herbal ingredients. Taking a capsule containing ginger, boswellia, and yarrow three times daily for 30 days reduces the frequency and severity of abdominal pain, as well as the severity of bloating, when compared with placebo in females, but not males, with mild to moderate IBS (96673). Another clinical study shows that taking an herbal mixture containing ginger, English horsemint, and purple nut sedge tuber three times daily for 8 weeks improves IBS symptoms including abdominal pain, stool frequency, stool consistency, incomplete evacuation, and urgency, when compared to baseline; these improvements are similar to those achieved by taking mebeverine 135 mg three times daily (89900). However, it is unclear if these effects are due to ginger, other ingredients, or the combination.
• Joint pain. Oral ginger has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Clinical research shows that taking a specific combination product (Instaflex Joint Support, Direct Digital) containing glucosamine sulfate 1500 mg, methylsufonlylmethane 500 mg, white willow bark extract 250 mg, ginger root concentrate 50 mg, Boswellia extract 125 mg, turmeric root extract 50 mg, cayenne 40 m H.U. 50 mg, and hyaluronic acid 4 mg in three divided doses daily for 8 weeks reduces joint pain severity by 37% compared to only 16% with placebo. However, it does not improve joint stiffness or function when compared with placebo (89560). It is unclear if these effects are due to ginger, other ingredients, or the combination.
• Menorrhagia. It is unclear if oral ginger is beneficial for menorrhagia. Details: Preliminary clinical research in healthy adults experiencing heavy menstrual bleeding shows that taking ginger 250 mg three times daily for 4 days, starting the day prior to menstruation, and repeating for three menstrual cycles, reduces the amount of menstrual bleeding when compared with placebo (96672).
• Menopausal symptoms. Although there has been interest in using oral ginger for menopausal symptoms such as insomnia, there is insufficient reliable information about the clinical effects of ginger for this purpose.
• Migraine headache. Small clinical studies suggest that oral ginger may modestly reduce migraine pain severity and duration. However, taking ginger doesn't seem to PREVENT migraines. Details: Ginger does not seem to be effective for the prevention of migraines. Clinical research in patients with episodic migraine shows that taking ginger extract 200 mg three times daily for 3 months does not reduce the number of migraine attacks, the use of analgesics, or the number of days with pain, any more than taking placebo (101761). However, ginger may be beneficial for the treatment of migraine. Clinical research shows that taking ginger extract 400 mg orally in the emergency room along with intravenous ketoprofen 100 mg reduces pain over the next 2 hours when compared with ketoprofen and placebo. This combination also resulted in an overall better response with a higher likelihood of having no or mild pain with treatment (101762). Taking ginger 250 mg at the onset of a common migraine headache seems to be as effective as taking sumatriptan 50 mg for reducing headache severity within two hours of treatment (89894). Furthermore, a combination of ginger and feverfew (GelStat Migraine, GelStat Corporation; LipiGesic M, PuraMed BioScience), administered sublingually at the onset of a migraine attack, decreases the duration and intensity of migraine pain when compared with placebo (19357,22602). It is unclear if these effects are due to ginger, feverfew, or the combination. Feverfew alone has demonstrated some benefit in treating migraines.
• Multiple sclerosis (MS). It is unclear if oral ginger is beneficial for MS. Details: A small clinical study in adults with MS shows that taking ginger 500 mg three times daily for 12 weeks reduces disability scores and improves physical and psychological quality of life scores when compared with placebo (111541).
• Nonalcoholic fatty liver disease (NAFLD). It is unclear if oral ginger is beneficial for NAFLD. Details: A small clinical study in patients with NAFLD shows that taking ginger root 1500 mg daily for 12 weeks reduces low-density lipoprotein (LDL) cholesterol and fasting blood glucose levels, but does not affect triglycerides, high-density lipoprotein (HDL) cholesterol, insulin resistance, blood pressure, or fatty liver index, when compared with placebo (102465).
• Obesity. Oral ginger has primarily been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Although some individual research disagrees (40802), a meta-analysis and most individual clinical trials show that taking ginger alone or with other ingredients does not reduce weight by a clinically significant amount when compared with placebo in overweight or obese individuals (20346,20347,96676,109521). Ginger has been taken alone or in combination with green tea and capsaicin; rhubarb, astragalus, red sage, turmeric, and gallic acid (Number Ten); or raspberry ketone (Razberi K, Integrity Nutraceuticals), caffeine, capsicum extract (Capsimax, OmniActive Health Technologies), bitter orange fruit (Advantra Z, Nutratech Inc), L-theanine, and black pepper fruit extract (Biperine, Sabinsa Corporation) (Prograde Metabolism) (20346,20347,40802,96676). Due to the various other ingredients contained in available formulations, any effect from ginger is unclear.
• Parturition. It is unclear if bathing in a ginger bath is beneficial for shortening the duration of labor. Details: Preliminary clinical research shows that bathing in 228 liters of water containing 4 drops of ginger essential oil does not shorten the duration of labor when compared with a regular bath (20345).
• Polycystic ovary syndrome (PCOS). It is unclear if oral ginger is beneficial for females with PCOS. Details: Preliminary clinical research in females with PCOS shows that taking ginger 500 mg three times daily orally for 8 weeks decreases body weight, body mass index, and levels of follicle stimulating hormone and luteinizing hormone, when compared with placebo. It does not affect testosterone levels (110006).
• Postoperative nausea and vomiting (PONV). Evidence for the use of oral ginger for preventing PONV is inconclusive and conflicting. Reasons for the conflicting findings may relate to the ginger formulation used and the outcomes measured. It is unclear if ginger aromatherapy is beneficial for PONV. Details: Some individual clinical studies, as well as a large, recent meta-analysis of the available clinical research, show that taking ginger by mouth 1 hour prior to surgery does not reduce the incidence of 24-hour PONV (3452,3453,17369,99445). Also, the meta-analysis found that, although ginger reduces the severity of PONV when measured on a visual analogue scale (VAS), it does not reduce the severity of PONV when measured on a verbal descriptive scale (VDS). Furthermore, ginger does not reduce the use of rescue antiemetic medications (99445). However, some small, individual clinical studies and a meta-analysis of older clinical research show that taking ginger by mouth prior to surgery reduces the incidence of 24-hour PONV by up to 16% to 38% (722,723,1919,13237,20336,20338,20339). In addition, large clinical trials show that the frequency and severity of PONV 2-6 hours after surgery are similar when ginger 1 gram is given orally or when medications such as metoclopramide or dexmedetomidine are given intravenously prior to undergoing anesthesia (103356,103360). However, taking ginger prior to general anesthesia, in combination with other antiemetics like dexamethasone or cimetidine and metoclopramide, does not seem to reduce nausea and vomiting when compared with the other medications alone (20337,89890). In contrast, other research shows that powdered ginger 1-2 grams 30-60 minutes before induction of anesthesia has been used in most studies showing benefit, occasionally followed by 1 gram of ginger administered two hours after surgery (722,723,13237,20336,20338,103356,103360). Ginger aromatherapy has also been evaluated for the prevention of PONV. Application of 5% ginger essential oil to the wrists of patients prior to the induction of general anesthesia seems to prevent PONV in approximately 80% of treated patients (20334). Also, use of ginger essential oil aromatherapy on a gauze pad results in nausea relief in approximately 67% of patients compared with 40% in the placebo group; however, a blend of essential oils including ginger, spearmint, peppermint, and cardamom, results in nausea relief in 82% of patients (89888).These conflicting findings may be due to differences in outcome measures and the chemical compositions of ginger preparations used in the various clinical studies. Some evidence suggests that the efficacy of ginger for preventing PONV differs based on the formulation used. A network meta-analysis of 18 studies evaluating various ginger preparations, including ginger oil, ginger powder, ginger extract, and a combination of ginger powder and antiemetics, for the prevention of PONV suggests that ginger powder and ginger oil are the most effective formulations for preventing nausea and vomiting, respectively. The analysis also shows that while no ginger formulation is superior to another for the prevention of nausea, ginger powder and ginger oil have a lower risk of postoperative vomiting when compared with ginger extract. A subgroup analysis suggests that ginger seems to be most effective in adults over 30 years of age, when administered preoperatively, and when used for gastrointestinal, hepatobiliary, obstetric, or ophthalmic surgeries (112108).
• Postoperative recovery. It is unclear if oral ginger is beneficial for postoperative recovery. Details: One preliminary clinical study in adults who had a tonsillectomy shows that taking a specific ginger supplement (Solgar, Leonia) 500 mg twice daily for 7 days along with acetaminophen and antibiotics modestly improves pain and wound healing when compared with acetaminophen and antibiotics alone (96674).
• Postpartum complications. It is unclear if oral ginger is beneficial in patients with postpartum pain. Details: A small clinical study in patients recovering from vaginal delivery shows that taking ginger powder 500 mg 8-hours post-delivery, followed by 250 mg every 8 hours thereafter for 24 hours, reduces postpartum pain by nearly 1 point on a 10-point rating scale when compared with placebo (107904). It is unclear if this improvement would be considered clinically relevant.
• Rheumatoid arthritis (RA). One small clinical study suggests that oral ginger may improve some symptoms of RA. Details: Preliminary clinical research in adults with RA shows that taking ginger powder 1500 mg daily for 12 weeks improves disease activity on the Disease Activity Score-28 when compared with placebo (100697).
• Swallowing dysfunction. The effects of oral ginger for treating swallowing dysfunction are inconclusive. Reasons for the conflicting findings may relate to the route of administration or the number of treatments provided. Details: Clinical research shows that applying a spray containing ginger and clematix root (Tongyan) to the oropharynx for 28 days is more effective than placebo at treating grade 2 or 3 dysphagia in stroke victims. However, there does not seem to be a beneficial effect in patients with grade 1 dysphagia (20342). Other clinical research in elderly patients with dysphagia shows that taking a single dose of ginger 2 mg orally does not improve swallowing but increases saliva (96671). It is possible that a single dose of ginger is not enough to improve swallowing function.
• Toxin-induced liver damage. Oral ginger might help to prevent liver damage in patients using antimycobacterial drugs. Details: Preliminary clinical research shows that a specific ginger supplement (Zintoma, Goldaru) 500 mg taken 30 minutes prior to antimycobacterial drugs daily for 4 weeks reduces the percentage of patients experiencing an increase in liver function enzymes to greater than five times the upper limit of normal by 54% when compared with placebo. Antimycobacterial drugs used for tuberculosis in the study included isoniazid 5 mg/kg, rifampin 10 mg/kg, ethambutol 15 mg/kg, and pyrazinamide 25 mg/kg daily (96670).
• Traumatic brain injury (TBI). Oral ginger has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Preliminary research in young adults with subjective memory dysfunction associated with mild TBI, shows that taking a combination of ginger 36 mg and boswellia 360 mg (Memoral) every 8 hours orally for one month improves scores for some, but not all, parameters on an auditory-visual learning test performed at one and three months, when compared with placebo. Total learning scores increased by about 7.5 points with the ginger combination product, compared with 4 points for placebo (110132). It is unclear if these effects are due to ginger, boswellia, or the combination.
• Ulcerative colitis. It is unclear if oral ginger is beneficial for improving symptoms of ulcerative colitis. Details: Preliminary clinical research in adults with ulcerative colitis shows that taking ginger powder 1000 mg twice daily for 12 weeks improves disease activity as measured by the Simple Clinical Colitis Activity Index Questionnaire when compared with taking placebo. However, taking ginger did not improve quality of life, stool frequency, bowel distress, or flatulence when compared with placebo (100694). It is possible that this study was not adequately powered to detect a difference in these secondary outcomes.
• Upper respiratory tract infection (URTI). Although there has been interest in using oral ginger for various upper respiratory tract infections, there is insufficient reliable information about the clinical effects of ginger for this condition.
• Vertigo. It is unclear if oral ginger is beneficial for improving symptoms of vertigo. Details: A small clinical study shows that taking 1 gram of ginger orally as a single dose prior to stimulated vertigo seems to reduce symptoms of vertigo, including nausea, when compared with placebo. However, it does not seem to reduce nystagmus (7623). More evidence is needed to rate ginger for these uses.

(Read more about GINGER)

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Aging skin. It is unclear if topical peony is beneficial in patients with aging skin. Details: Preliminary clinical research shows that using a cosmetic ingredient containing 0.5% paeoniflorin, a constituent of peony root, for 8 weeks can reduce facial wrinkles when compared with baseline (68356). The validity of this finding is limited by the lack of a comparator group.
• Anal fissures. Although there has been interest in using topical peony for anal fissures, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Ankylosing spondylitis. Small, low-quality clinical studies suggest that oral peony, as total glucosides of peony (TGP), may improve disease symptoms in patients with ankylosing spondylitis. Details: A meta-analysis of 3 clinical trials in patients with ankylosing spondylitis (AS) shows that taking TGP 0.6 grams 3 times daily with conventional medical treatment for 12-24 weeks improves the AS disease activity score when compared with conventional treatment alone. TGP also improves inflammatory markers including erythrocyte sedimentation rate, C-reactive protein, tumor necrosis factor alpha, and interleukin-6 (112861). The reliability of these findings is limited by the low to very low quality of the included studies. Additionally, all of the studies were conducted in China; it is unclear if findings can be applied to other geographical regions and populations.
• Antipsychotic-induced hyperprolactinemia. Oral peony has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Preliminary clinical research in females with risperidone-induced hyperprolactinemia shows that taking a specific combination of peony and licorice (Peony-Glycyrrhiza Decoction; PGD) 45 grams daily for 4 weeks is similarly effective to bromocriptine for reducing prolactin levels (59775). A similar trial in males with antipsychotic-induced hyperprolactinemia shows that taking an herbal extract containing peony and licorice (shakuyaku-kanzo-to), 2.5 grams three times daily, reduces prolactin levels after 4 weeks of treatment when compared with baseline. Prolactin levels returned to baseline 4 weeks after treatment cessation (59907). The validity of this study is limited by the lack of a comparator group. Subsequently, a higher quality clinical trial in females with antipsychotic-induced hyperprolactinemia shows that taking a peony and licorice decoction (PGD) 45 grams daily for 16 weeks does not improve prolactin levels or clinical symptoms when compared with placebo (97219). However, a small clinical trial in adults with schizophrenia and sexual dysfunction due to antipsychotic-induced hyperprolactinemia shows that taking a similar PGD formulation for 8 weeks improves sexual function scores and prevents further increases in prolactin levels when compared with a non-treated control group (112412). It is unclear if any effects are due to peony, licorice, or the combination.
• Atherosclerosis. Although there has been interest in using oral peony for atherosclerosis, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Chronic fatigue syndrome (CFS). Although there has been interest in using oral peony for CFS, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Cirrhosis. Although there has been interest in using oral peony for cirrhosis, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Cough. Although there has been interest in using oral peony for cough, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Dysmenorrhea. Although there has been interest in using oral peony for dysmenorrhea, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Dyspepsia. Although there has been interest in using oral peony for dyspepsia, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Diabetic nephropathy. It is unclear if oral peony is beneficial in patients with diabetic nephropathy. Details: Preliminary clinical research in Chinese adults with diabetic nephropathy shows that taking total glucosides of peony (TGP) 600 mg three times daily in conjunction with losartan 100 mg daily for 6 months does not improve urinary albumin excretion rate when compared with losartan alone. Taking TGP in conjunction with losartan also did not affect serum creatinine, fasting glucose, glycated hemoglobin (HbA1c), triglycerides, or total cholesterol when compared with losartan alone (98466).
• Epilepsy. It is unclear if oral peony is beneficial in patients with epilepsy. Details: Preliminary clinical research in children 1-14 years of age with intractable epilepsy shows that taking peony root extract orally 20 mg/kg twice daily for 4 weeks reduces weekly seizure frequency and average seizure duration by 80% and 83%, respectively, when compared with baseline. Approximately 63% of subjects reported a reduction in seizure frequency of at least 50% when compared with baseline. The validity of this study is limited by the lack of a comparator group (106851).
• Gout. Although there has been interest in using oral peony for gout, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Hepatitis. Although there has been interest in using oral peony for hepatitis, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Juvenile idiopathic arthritis (JIA). Small clinical studies suggest that oral peony, as total glucosides of peony (TGP), may modestly improve symptoms in patients with JIA. Details: A pooled analysis of low-quality clinical research in Chinese children 1.5-14 years of age with JIA shows that taking TGP 30-180 mg/kg daily or 600-1800 mg daily in conjunction with methotrexate for 9-26 weeks improves the odds of overall response rate by 1.5 to 2.5 times when compared with methotrexate alone. TGP also reduces erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) levels when compared with methotrexate alone. Preliminary subgroup analyses suggest that TGP is not effective for JIA if it is taken for 8 weeks or less (92785). Another meta-analysis of 7 small to moderate-sized clinical trials in children with JIA also shows that taking TGP 0.3 mg/kg, 30-60 mg/kg, or 1200 mg daily with conventional treatment for 12-24 weeks improves effectiveness rates when compared with conventional treatment alone. TGP also reduces ESR, CRP, and tumor necrosis factor alpha (TNF-α) (112861). The reliability of these findings is limited by the variability in the quality of the included studies. Additionally, all of the studies were conducted in China; it is unclear if findings can be applied to other geographical regions and populations.
• Mastalgia. Although there has been interest in using oral peony for mastalgia, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Migraine headache. Although there has been interest in using oral peony for migraine, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Muscle cramps. Oral peony has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Preliminary, low-quality, clinical research shows that taking a specific combination of peony and licorice (shakuyaku-kanzo-to) orally, 2.5-6 grams daily for up to 4 weeks, relieves muscle cramps when compared to baseline in patients undergoing hemodialysis (13551,13552). The validity of these studies is limited by the lack of a comparator group. It is also unclear if this effect is due to peony, licorice, or the combination.
• Neuropathic pain. Although there has been interest in using oral peony for neuropathic pain, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Osteoarthritis. Some low-quality clinical studies suggest that oral peony, as total glucosides of peony (TGP), may modestly improve symptoms in patients with osteoarthritis. Details: A meta-analysis of 4 moderate-sized clinical trials in adults with osteoarthritis shows that taking TGP 0.6 grams 2 or 3 times daily with conventional medical treatment for 4-12 weeks improves joint pain when compared with conventional treatment alone (112861). The reliability of these findings is limited by the low quality and high heterogeneity of the included studies. Additionally, all of the studies were conducted in China; it is unclear if findings can be applied to other geographical regions and populations.
• Pancreatitis. It is unclear if rectal peony is beneficial in patients with pancreatitis. Details: Preliminary clinical research in adults with moderate to severe acute pancreatitis shows that rectal administration of 150 mL water containing 15 grams of red peony root granules twice daily for 7 days in addition to standard care reduces the time to resolution of abdominal pain and normal bowel habits by 25% when compared with a placebo enema. Additionally, patients receiving red peony root had an average 2-day reduction in hospital stay and a greater improvement on the modified Balthazar CT score when compared with placebo (104283).
• Polycystic ovary syndrome (PCOS). Oral peony has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Clinical research shows that taking peony root extract 2250 mg daily, along with Ceylon cinnamon, levant berry, St. John's wort, Tribulus, and licorice, during the follicular phase of the menstrual cycle for 3 months reduces the rate of oligomenorrhea or amenorrhea by 33% and the time between menstrual cycles by 43 days when compared with lifestyle modification alone. Taking this combination also improves quality of life by about 30% and modestly reduces body weight and body mass index when compared with lifestyle intervention alone. Although taking this combination improved conception rate by 4-fold, live birth rate was similar to lifestyle intervention alone (97216). It is unclear if these effects are due to peony, the other ingredients, or the combination.
• Premenstrual syndrome (PMS). Although there has been interest in using oral peony for PMS, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Psoriasis. It is unclear if oral peony is beneficial for plaque psoriasis. Details: Preliminary clinical research in Chinese adults with moderate to severe plaque psoriasis shows that taking total glucosides of peony (TGP) 600 mg three times daily in conjunction with acitretin for 12 weeks does not improve plaque size or severity when compared with acitretin alone. However, taking TGP in combination with acitretin might increase the number of patients achieving a 50% reduction in plaque size when compared with acitretin alone (97950).
• Psoriatic arthritis. Small, low-quality clinical studies suggest that oral peony, as total glucosides of peony (TGP), may improve symptoms in patients with psoriatic arthritis. Details: A meta-analysis of 2 small clinical trials in adults with psoriatic arthritis shows that taking TGP 0.6 grams 3 times daily with conventional medical treatment for 12-24 weeks improves Psoriasis Area and Severity Index (PASI) scores and the inflammatory marker erythrocyte sedimentation rate when compared with conventional treatment alone (112861). The reliability of these findings is limited by the low quality and high heterogeneity of the included studies. Additionally, all of the studies were conducted in China; it is unclear if findings can be applied to other geographical regions and populations.
• Respiratory tract infections. Although there has been interest in using oral peony for respiratory tract infections, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Restless legs syndrome (RLS). Oral peony has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A meta-analysis of 12 low-quality clinical studies in Chinese patients with RLS shows that taking peony-containing combination herbal preparations along with conventional therapy appears to improve sleep quality and decrease RLS symptoms when compared with conventional therapy alone. A few of the studies included in this analysis also suggest that taking peony-containing herbal products alone might be more effective than conventional therapy for RLS (100991). The peony-containing products included in this analysis contained between 4-15 other herbal ingredients. It is unclear whether the effects are due to peony, other ingredients, or the combination.
• Rheumatoid arthritis (RA). It is unclear if oral peony is beneficial in patients with RA; evidence is conflicting. Details: Although low-quality clinical research in patients with RA has shown that use of total glucosides of peony (TGP) in conjunction with standard treatment for 4-24 weeks reduces inflammatory markers such as erythrocyte sedimentation rate and C-reactive protein when compared with standard treatment alone, effects on RA symptoms are conflicting (92786,101245,112861). A pooled analysis of clinical research in adults with RA shows that taking TGP in conjunction with leflunomide for 4-24 weeks is less effective for reducing RA symptom scores than taking leflunomide alone (92786). In contrast, another pooled analysis of clinical research in adults with RA shows that taking TGP for 12-24 weeks in combination with methotrexate improves swollen joint count, but not other symptoms such as morning stiffness and tender joint count, when compared with methotrexate alone. Preliminary subgroup analyses also suggest that taking TGP in conjunction with methotrexate might reduce overall adverse effects when compared with methotrexate alone (101245). Of note, the dose of TGP used is not reported in most trials included in these two analyses. Another meta-analysis of 10 mostly small to moderate-sized clinical trials in adults with RA shows that taking TGP 0.6 grams 1-3 times daily with conventional medical treatment for 12-48 weeks improves symptoms as evaluated with the Disease Activity of 28 joints (DAS28) scale when compared with conventional treatment alone (112861). However, these analyses are all limited by the low quality of the included studies. Additionally, all of the included studies were conducted in China; it is unclear if findings can be applied to other geographical regions and populations.
• Sjogren syndrome. It is unclear if oral peony is beneficial in patients with Sjogren syndrome. Details: Some clinical research in Chinese adults with Sjogren syndrome shows that taking total glucosides of peony (TGP) 600 mg three times daily for 24 weeks improves overall symptoms, with the greatest effects on symptoms of dry eye and fatigue, when compared with placebo (100992). An earlier and smaller clinical study from the same research group found that taking TGP at the same dose and duration improved symptoms of dry mouth, but did not reduce overall symptom scores or other markers of disease, when compared with placebo (97949). However, this study was not adequately powered to detect differences in overall symptom scores between TGP and placebo.
• Spasticity. Although there has been interest in using oral peony for spasticity, there is insufficient reliable information about the clinical effects of peony for this purpose.
• Systemic lupus erythematosus (SLE). Small clinical studies suggest that oral peony, as total glucosides of peony (TGP), may modestly improve disease activity scores in patients with SLE. Details: A meta-analysis of 13 small to moderate-sized, low-quality clinical studies in patients with SLE shows that taking TGP 0.6 grams 2-3 times daily or 1.2 grams twice daily for 1-6 months in conjunction with conventional treatment modestly improves the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) score when compared with conventional treatment alone. Analyses of secondary endpoints which were not available for all studies show that TGP also improves markers of SLE disease activity, including erythrocyte sedimentation rate (ESR) and C-reactive protein, reduces the average daily dose of glucocorticoids and the cumulative dose of cyclophosphamide, and decreases the rate of disease recurrence (110432). However, the validity of the findings from this meta-analysis is limited by the heterogeneity of the included studies, which enrolled patients of varying age and disease severity. Additionally, a similar meta-analysis of 8 small to moderate-sized, low-quality clinical studies in adults with SLE shows that taking TGP 0.6 grams 2-3 times daily for 3-12 months in conjunction with conventional treatment of glucocorticoids and/or immunosuppressants improves SLEDAI scores when compared with conventional treatment alone. TGP also improves markers of inflammation such as ESR, levels of immunoglobulins A, G and M, and complement 3 and 4 (112862). The validity of these finding is also limited by substantial heterogeneity which may be due to differences in conventional therapies. In addition, all of the studies included in these meta-analyses were conducted in China; it is unclear if findings can be applied to other geographical regions and populations. More evidence is needed to rate peony for these uses.

(Read more about PEONY)

POSSIBLY EFFECTIVE

• Hypercholesterolemia. Several small studies suggest that oral safflower oil, as a substitute for coconut oil, butter, or other animal fats in the diet, may reduce total and low-density lipoprotein (LDL) cholesterol levels in patients with or without hypercholesterolemia. Details: Three small clinical studies in patients with or without hypercholesterolemia show that substituting coconut oil, butter, or other animal fats in the diet with safflower oil (36% of total daily calories) for 4-6 weeks can lower levels of total and LDL cholesterol, but has no beneficial effects on high-density lipoprotein (HDL) cholesterol or triglycerides (25391,25393,72310).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Coronary heart disease (CHD). Safflower oil, which is high in oleic acid, may be beneficial for reducing the risk of CHD when used to replace other dietary oils. Details: Some safflower oil products contain high quantities of oleic acid. In 2018, the US Food and Drug Administration (FDA) determined that it would allow a qualified health claim stating that consuming 1.5 tablespoons daily of oils containing at least 70% oleic acid may reduce the risk of CHD. In order to obtain any benefit, this oil must be used to replace fats and oils higher in saturated fat. However, the FDA has determined that this statement is based on supporting, rather than conclusive, evidence (98563).
• Cystic fibrosis. It is unclear if oral safflower oil is beneficial in children with cystic fibrosis. Details: A very small clinical study in children with cystic fibrosis shows that taking safflower oil 1 gram/kg daily for one year does not affect sweat chloride concentrations or disease severity when compared with age-matched controls (72281).
• Diabetes. Small clinical studies of oral safflower oil for improving glycemic control in patients with diabetes have yielded mixed results. Details: One very small clinical trial in patients with type 2 diabetes shows that taking safflower oil 10 grams daily for 3 weeks increases fasting blood glucose by 11% when compared to baseline. Insulin levels, insulin sensitivity, and lipid levels were not affected (13146). However, another small clinical study in obese, postmenopausal patients with type 2 diabetes shows that taking safflower oil 2 grams four times daily for 16 weeks decreases HbA1c by 0.64% and increases high-density lipoprotein (HDL) cholesterol by about 5 mg/dL when compared with conjugated linoleic acid (CLA) 2 grams four times daily. Insulin sensitivity and fasting blood glucose levels do not appear to be affected (94039). These differing outcomes may be due to the small study sizes and varied patient populations.
• Diabetic nephropathy. Small clinical studies suggest that intravenous safflower yellow, a component of safflower flower, might improve symptoms and markers of diabetic nephropathy. Details: A meta-analysis of 14 small and low-quality clinical studies in adults with diabetic nephropathy shows that intravenous administration of safflower yellow as an adjunct to conventional treatment reduces urinary albumin excretion rate, fasting blood glucose, serum creatinine, and blood urea nitrogen when compared with conventional treatment alone. Overall, patients receiving safflower yellow were more likely to experience a clinical improvement in symptoms when compared with conventional treatment alone (102381).
• Familial hypercholesterolemia. Small clinical studies suggest that substituting safflower oil in place of butter in the diet may modestly reduce cholesterol levels in patients with familial hypercholesterolemia. Details: Two very small clinical studies in patients with familial hypercholesterolemia show that substituting safflower oil in place of butter in the diet (contributing 36% of daily calories) for 3 weeks decreases total and low-density lipoprotein (LDL) cholesterol levels when compared with butter (72246,72267).
• Hepatitis C. Oral safflower oil has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small, open-label clinical study in patients with chronic hepatitis C shows that taking a specific combination product containing safflower, pumpkin seeds, plantain seeds, and Japanese honeysuckle (EH0202) 1 gram daily for 3 months modestly reduces general discomfort, abdominal bloating, nausea, and vomiting when compared to baseline. However, hepatitis C RNA and hepatitis C virus antibody levels are not affected (72238).
• Hypertension. It is unclear if oral safflower oil is beneficial for reducing blood pressure; the available research is conflicting. Details: A very small clinical study in patients with hypertension shows that taking safflower oil 10 mL twice daily for 6-8 weeks reduces diastolic blood pressure when compared with placebo (72304). However, another small clinical study in patients with mild hypertension shows that taking safflower oil 30 mL daily for 6 weeks does not affect blood pressure when compared to baseline (72268).
• Low birth weight. It is unclear if oral safflower oil is beneficial in infants with low birth weight. Details: A small clinical study in low birth weight infants shows that fortifying formula or breast milk with a specific safflower oil product (Safola, Marico Industries Ltd.) does not improve weight gain or skin thickness when compared with coconut oil or unfortified formula or breast milk (72229).
• Metabolic syndrome. It is unclear if oral safflower oil is beneficial in patients with metabolic syndrome. Details: A small clinical study in patients with metabolic syndrome shows that taking safflower oil 2 grams four times daily for 12 weeks reduces waist circumference by 3.4 cm, systolic blood pressure by 7 mmHg, diastolic blood pressure by 3 mmHg, and fasting blood glucose by 8 mg/dL when compared with placebo. However, body weight, body mass index (BMI), and lipid levels were not affected (108889).
• Obesity. Although there has been interest in using oral safflower oil for obesity, there is insufficient reliable information about the clinical effects of safflower oil for this purpose.
• Myocardial infarction. Intravenous safflower yellow, a component of safflower flower, might improve outcomes when used as an adjunct to conventional therapy for the treatment of acute coronary syndrome (ACS). Details: A meta-analysis of 16 small, low-quality clinical trials in patients with ACS, including myocardial infarction and unstable angina, shows that intravenous administration of safflower yellow 20-40 mL daily for 10-15 days as an adjunct to conventional therapy improves clinical outcomes, electrocardiogram measures, and left ventricular ejection fraction when compared with placebo (108891).
• Phrynoderma. It is unclear if oral safflower oil is beneficial in patients with phrynoderma. Details: A small clinical study in patients with phrynoderma shows that taking 30 mL of safflower oil containing vitamin E 116 mg and linoleic acid 68% daily for more than 8 weeks can partially improve skin dryness and roughness when compared to baseline (72269). The validity of these findings is limited by the lack of a comparator group.
• Scarring. Topical safflower oil has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small clinical study in patients with non-hypertrophic scars and striae shows that applying an oil containing safflower oil 55.9%, olive oil 42%, grapefruit oil 2%, and tocopherol 0.1% (Kneipp Bio Skin Oil, Kneipp GmbH) to the scars and striae twice daily for 8 weeks improves scores on the Patient Scar Assessment Scale (PSAS) by 20%, compared to a 6% improvement in untreated areas (95938).
• Stroke. Small clinical studies suggest that intravenous safflower yellow, a constituent of safflower flower, as an adjunct to conventional treatments, may improve neurological outcomes post-stroke. Details: A meta-analysis of seven small, low-quality clinical studies in Chinese patients with acute ischemic stroke shows that intravenous administration of safflower yellow 100-150 mg as an adjunct to conventional treatments, starting within 72 hours of stroke onset and continuing once daily for 14 days thereafter, increases the odds of neurological improvement by about 3-fold when compared with conventional treatments alone (94038).
• Unstable angina. Intravenous safflower yellow, a component of safflower flower, might improve outcomes when used as an adjunct to conventional therapy for the treatment of unstable angina. Details: A meta-analysis of seven low-quality clinical studies in Chinese patients with unstable angina shows that intravenous safflower yellow 50-150 mg daily for 14-15 days in addition to conventional treatment modestly improves electrocardiogram (ECG) measures and symptoms of angina when compared with conventional treatment alone (94041). Another meta-analysis of 16 small, low-quality clinical trials in patients with acute coronary syndrome (ACS), including unstable angina and myocardial infarction, shows that intravenous administration of safflower yellow 20-40 mL daily for 10-15 days as an adjunct to conventional therapy improves clinical outcomes, ECG measures, and left ventricular ejection fraction when compared with placebo (108891). More evidence is needed to rate safflower for these uses.

(Read more about SAFFLOWER)

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Aging skin. Although there has been interest in using topical zizyphus for aging skin, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Anemia of chronic disease. Although there has been interest in using oral zizyphus for anemia of chronic disease, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Anxiety. Although there has been interest in using oral zizyphus for anxiety, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Asthma. Although there has been interest in using oral zizyphus for asthma, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Athletic performance. Although there has been interest in using oral zizyphus to improve athletic performance, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Cancer. Although there has been interest in using oral zizyphus for cancer, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Constipation. It is unclear if oral zizyphus fruit extract is beneficial in patients with constipation. Details: A small clinical study in patients with idiopathic constipation shows that taking zizyphus fruit extract 20-40 drops daily for 12 weeks improves bloating, abdominal pain, difficult evacuation, and quality of life when compared to baseline. Significant improvements in constipation-related symptoms were lacking in patient taking placebo drops (93316). The validity of these findings is limited by the lack of statistical comparison between groups.
• Diabetes. It is unclear if oral zizyphus fruit powder is beneficial in patients with type 2 diabetes. Details: A small clinical study in patients with type 2 diabetes shows that taking zizyphus fruit powder 30 grams daily for 12 weeks reduces measures of insulin resistance and improves measures of insulin sensitivity, but does not affect fasting blood glucose levels or glycated hemoglobin, when compared with placebo (104507).
• Diarrhea. Although there has been interest in using oral zizyphus for diarrhea, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Epilepsy. Although there has been interest in using oral zizyphus for epilepsy, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Hyperlipidemia. It is unclear if oral zizyphus fruit powder is beneficial in patients with hyperlipidemia. Details: A small clinical study in obese adolescents with hyperlipidemia shows that taking zizyphus fruit powder 5 grams three times daily for one month modestly lowers total cholesterol and low-density lipoprotein (LDL) cholesterol, but does not improve high-density lipoprotein (HDL) cholesterol, when compared with placebo (93317). However, a small clinical study in patients with type 2 diabetes shows that taking zizyphus fruit powder 30 grams daily for 12 weeks does not improve lipid levels when compared with placebo (104507).
• Hypertension. Although there has been interest in using oral zizyphus for hypertension, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Insomnia. It is unclear if oral zizyphus seed extract is beneficial in patients with insomnia. Details: A very small crossover trial in patients with chronic insomnia shows that taking zizyphus seed extract 2 grams one hour before bedtime for 4 weeks improves sleep quality as measured using the Pittsburgh Sleep Quality Index, but not when assessed on the Insomnia Severity Index, when compared with placebo. While patients self-reported significant improvements in total sleep time, sleep efficiency, and sleep onset latency with zizyphus, these findings were not consistent with data gathered from actigraphy wrist watches worn during the study (107921). Zizyphus has also been evaluated in combination with other ingredients. A clinical trial in healthy adults with mild insomnia shows that taking a specific product (LZ Complex3, Sanofi) containing zizyphus 4.5 grams, hops 500 mg, lactium 75 mg, magnesium oxide 52.5 mg, and vitamin B6 10 mg daily for 2 weeks does not improve sleep quality, daytime functioning, or physical fatigue when compared with placebo (95971). Liver disease. Although there has been interest in using oral zizyphus for liver disease, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Neonatal jaundice. It is unclear if oral zizyphus fruit extract is beneficial for neonatal jaundice. Details: A small clinical study in hospitalized infants with jaundice who are also being treated with phototherapy shows that giving zizyphus fruit extract 1 mL/kg orally three times daily does not significantly reduce levels of bilirubin, but modestly reduces the duration of hospitalization by 0.2 days, when compared with placebo (93306).
• Peptic ulcers. Although there has been interest in using oral zizyphus for peptic ulcers, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Wound healing. Although there has been interest in using topical zizyphus for wound healing, there is insufficient reliable information about the clinical effects of zizyphus for this purpose. More evidence is needed to rate zizyphus for these uses.

(Read more about ZIZYPHUS)

LIKELY SAFE ...when used orally in amounts commonly found in foods. Angelica archangelica has Generally Recognized as Safe (GRAS) status in the US (4912). There is insufficient reliable information available about the safety of Angelica archangelica when used orally or topically for medicinal purposes.

PREGNANCY AND LACTATION:
Insufficient reliable information available; avoid using.

(Read more about ANGELICA ARCHANGELICA)

LIKELY UNSAFE ...when used orally. The FDA prohibits calamus use in food products due to evidence of carcinogenic effects in animals receiving high doses of a calamus strain high in beta-asarone (93978,94727,94728). However, the beta-asarone content can vary widely among species from 0% to 96% (6); some products may be safer than others. There is insufficient reliable information available about the safety of calamus when used topically.

PREGNANCY AND LACTATION: LIKELY UNSAFE
when used orally; avoid using (4,500).

(Read more about CALAMUS)

LIKELY SAFE ...when used orally and appropriately. Ginger has been safely used in multiple clinical trials (721,722,723,5343,7048,7084,7085,7400,7623,11346)(12472,13080,13237,13244,17369,17928,17929,89889,89890,89894)(89895,89898,89899,90102,96252,96253,96259,96260,96669) (101760,101761,101762,103359,107903).

POSSIBLY SAFE ...when used topically and appropriately, short-term (89893,89897).

CHILDREN: LIKELY SAFE
when consumed in the amounts typically found in foods.

CHILDREN: POSSIBLY SAFE
when used orally and appropriately, short-term. Ginger powder has been used with apparent safety at a dose of up to 750 mg daily for 4 days in girls aged 14-18 years (96255).

PREGNANCY: LIKELY SAFE
when consumed in the amounts typically found in foods.

PREGNANCY: POSSIBLY SAFE
when used for medicinal purposes. Despite some early reports of adverse effects (721,7083) and one observational study suggesting that taking dried ginger and other herbal supplements during the first 20 weeks of pregnancy marginally increased the chance of stillbirth (96254), most research shows that ginger is unlikely to cause harm to the baby. The risk for major malformations in infants of parents who took ginger when pregnant does not appear to be higher than the baseline rate of 1% to 3% (721,1922,5343,11346,13071,13080,96254). Also, other research suggests that ginger intake during various trimesters does not significantly affect the risk of spontaneous abortion, congenital malformations, stillbirth, perinatal death, preterm birth, low birth weight, or low Apgar scores (18211,90103). Ginger use has been associated with an increase in non-severe vaginal bleeding, including spotting, after week 17 of pregnancy (18211).

LACTATION: LIKELY SAFE
when consumed in the amounts typically found in foods. There is insufficient reliable information available about the safety of ginger when used for medicinal purposes; avoid amounts greater than those found in foods.

(Read more about GINGER)

POSSIBLY SAFE ...when used orally and appropriately, short term. Total glucosides of peony has been used with apparent safety in doses of up to 1800 mg daily for up to 12 months (92786,97949,97950,98466,100992,110432,112861,112862). Peony root extract has been used with apparent safety at a dose of 2250 mg daily for up to 3 months (97216). There is insufficient reliable information available about the safety of peony when used orally, topically, or rectally, long-term.

CHILDREN: POSSIBLY SAFE
when used orally and appropriately, short-term. Total glucosides of peony has been used with apparent safety in children 1.5-4 years of age at doses up to 180 mg/kg daily or 1.2 grams daily for up to 12 months (92785). Peony root extract 40 mg/kg daily has also been used with apparent safety in children 1-14 years of age for 4 weeks (106851).

PREGNANCY: POSSIBLY UNSAFE
when used orally. Preliminary research suggests that peony can cause uterine contractions (13400). However, other preliminary research suggests a combination of peony and angelica with or without motherwort, banksias rose, and ligustica, might be safe (11015,48433). Until more is known, avoid use.

LACTATION:
Insufficient reliable information available; avoid using.

(Read more about PEONY)

LIKELY SAFE ...when safflower oil is used orally as part of the diet (6,13146,72238).

POSSIBLY SAFE ...when safflower oil is used topically for up to 8 weeks (95938). ...when safflower oil is administered intravenously in recommended doses by a health care professional. A specific safflower oil emulsion (Liposyn) 10% to 20% has been used intravenously for up to 2 weeks (72300,72301). ...when safflower yellow, a component of safflower flower, is administered intravenously and appropriately. Safflower yellow has been used with apparent safety in doses up to 150 mg daily for up to 5 weeks (94038,94041,102381).

CHILDREN: POSSIBLY SAFE
when safflower oil is administered intravenously in recommended doses by a healthcare professional. A specific safflower oil emulsion (Liposyn) 20% has been used intravenously in infants and children for up to 2 weeks (72284,72295). ...when safflower oil is used orally in medicinal amounts. Safflower oil 2.5 mL daily has been taken safely for 8 weeks (94042). There is insufficient reliable information available about the safety of safflower flower in children.

PREGNANCY: LIKELY SAFE
when safflower oil is used orally as part of the diet (6,13146,72238).

PREGNANCY: POSSIBLY SAFE
when safflower oil is administered intravenously in recommended doses by a healthcare professional (20529).

PREGNANCY: LIKELY UNSAFE
when safflower flower is used due to its abortifacient, menstrual stimulant, and uterine stimulant effects (11,12).

LACTATION: LIKELY SAFE
when safflower oil is used orally as part of the diet (6,13146,72238). There is insufficient reliable information available about the safety of safflower flower during lactation; avoid using.

(Read more about SAFFLOWER)

LIKELY SAFE ...when zizyphus fruit is consumed in the amounts typically found in foods.

POSSIBLY SAFE ...when zizyphus fruit or seed is used orally and appropriately, short-term. Zizyphus fruit powder has been used with apparent safety at doses up to 30 grams daily for up to 12 weeks (93317,104507). Zizyphus fruit extract has been used with apparent safety at a dose of 20-40 drops daily for up to 12 weeks (93316). Zizyphus seed extract has been used with apparent safety at a dose of 2 grams daily for 4 weeks (107921). There is insufficient reliable information available about the safety of zizyphus when used topically.

PREGNANCY AND LACTATION: LIKELY SAFE
when zizyphus fruit is consumed in the amounts typically found in foods. There is insufficient reliable information available about the safety of zizyphus fruit in amounts greater than those found in foods; avoid using.

(Read more about ZIZYPHUS)

(Read more about ANGELICA ARCHANGELICA)

ANTICHOLINERGIC DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D In vitro evidence suggests that calamus can inhibit acetylcholinesterase (AChE) (38418). Theoretically, concurrent use of anticholinergic drugs and calamus might decrease the effectiveness of the anticholinergic drug.  Details Some anticholinergic drugs include atropine, benztropine (Cogentin), biperiden (Akineton), procyclidine (Kemadrin), and trihexyphenidyl (Artane).

ANTIHYPERTENSIVE DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Animal research suggests that calamus can decrease the rate and strength of the heartbeat, which might lower blood pressure (38444). Theoretically, combining calamus with other antihypertensive medications might increase the risk of hypotension; use with caution.  Details Some antihypertensive drugs include captopril (Capoten), enalapril (Vasotec), losartan (Cozaar), valsartan (Diovan), diltiazem (Cardizem), Amlodipine (Norvasc), hydrochlorothiazide (HydroDiuril), furosemide (Lasix), and many others.

CHOLINERGIC DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D In vitro evidence suggests that calamus can inhibit acetylcholinesterase (AChE) (38418). Theoretically, concurrent use of calamus with other cholinergic drugs might have additive effects and increase the risk of cholinergic side effects.  Details Cholinergic drugs include bethanechol (Urecholine), donepezil (Aricept), echothiophate (Phospholine Iodide), edrophonium (Enlon, Reversol, Tensilon), neostigmine (Prostigmin), physostigmine (Antilirium), pyridostigmine (Mestinon, Regonol), succinylcholine (Anectine, Quelicin), and tacrine (Cognex).

CYTOCHROME P450 2D6 (CYP2D6) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D In vitro research suggests that calamus extract can inhibit cytochrome P450 2D6 (CYP2D6) (93975). Theoretically, use of calamus with drugs metabolized by CYP2D6 might increase drug levels and potentially increase the risk of adverse effects.  Details Some drugs metabolized by CYP2D6 include amitriptyline (Elavil), codeine, desipramine (Norpramin), flecainide (Tambocor), haloperidol (Haldol), imipramine (Tofranil), metoprolol (Lopressor, Toprol XL), ondansetron (Zofran), paroxetine (Paxil), risperidone (Risperdal), tramadol (Ultram), venlafaxine (Effexor), and others.

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D In vitro research suggests that calamus inhibits cytochrome P450 3A4 (CYP3A4) (93975). Theoretically, use of calamus with drugs metabolized by CYP3A4 might increase drug levels and potentially increase the risk of adverse effects.  Details Some drugs metabolized by CYP3A4 include lovastatin (Mevacor), clarithromycin (Biaxin), indinavir (Crixivan), sildenafil (Viagra), triazolam (Halcion), and numerous others.

(Read more about CALAMUS)

ANTICOAGULANT/ANTIPLATELET DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = B Ginger may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs. However, research is conflicting.  Details Laboratory research suggests that ginger inhibits thromboxane synthetase and decreases platelet aggregation (7622,12634,20321,20322,20323,96257). However, this has not been demonstrated unequivocally in humans, with mixed results from clinical trials (96257). Theoretically, excessive amounts of ginger might increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.

ANTIDIABETES DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, taking ginger with antidiabetes drugs might increase the risk of hypoglycemia.  Details Animal and human research suggests that ginger might increase insulin levels and/or decrease blood glucose levels (12636,20402,20403,20404,20405,89895,89896,107898).

CALCIUM CHANNEL BLOCKERS Interaction Rating = Minor Be watchful with this combination. Severity = Moderate •  Occurrence = Unlikely •  Level of Evidence = D Theoretically, taking ginger with calcium channel blockers might increase the risk of hypotension.  Details Some animal and in vitro research suggests that ginger has hypotensive and calcium channel-blocking effects (12633). Another animal study shows that concomitant administration of ginger and the calcium channel blocker amlodipine leads to greater reductions in blood pressure when compared with amlodipine alone (107901).

CYCLOSPORINE (Neoral, Sandimmune) Interaction Rating = Minor Be watchful with this combination. Severity = Mild •  Occurrence = Possible •  Level of Evidence = D Theoretically, when taken prior to cyclosporine, ginger might decrease cyclosporine levels.  Details In an animal model, ginger juice taken 2 hours prior to cyclosporine administration reduced the maximum concentration and area under the curve of cyclosporine by 51% and 40%, respectively. This effect was not observed when ginger juice and cyclosporine were administered at the same time (20401).

CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES Interaction Rating = Minor Be watchful with this combination. Severity = Insignificant •  Occurrence = Possible •  Level of Evidence = D Theoretically, ginger might increase the levels of CYP1A2 substrates.  Details In vitro research shows that ginger inhibits CYP1A2 activity (111544). However, this interaction has not been reported in humans.

CYTOCHROME P450 2B6 (CYP2B6) SUBSTRATES Interaction Rating = Minor Be watchful with this combination. Severity = Insignificant •  Occurrence = Possible •  Level of Evidence = D Theoretically, ginger might increase the levels of CYP2B6 substrates.  Details In vitro research shows that ginger inhibits CYP2B6 activity (111544). However, this interaction has not been reported in humans.

CYTOCHROME P450 2C9 (CYP2C9) SUBSTRATES Interaction Rating = Minor Be watchful with this combination. Severity = Insignificant •  Occurrence = Possible •  Level of Evidence = D Theoretically, ginger might increase the levels of CYP2C9 substrates.  Details In vitro research shows that ginger inhibits CYP2C9 activity (111544). However, this interaction has not been reported in humans.

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES Interaction Rating = Minor Be watchful with this combination. Severity = Insignificant •  Occurrence = Possible •  Level of Evidence = D Theoretically, ginger might increase the levels of CYP3A4 substrates.  Details In vitro research shows that ginger inhibits CYP3A4 activity (111544). However, this interaction has not been reported in humans.

LOSARTAN (Cozaar) Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, ginger might increase levels of losartan and the risk of hypotension.  Details In animal research, ginger increased the levels and hypotensive effects of a single dose of losartan (102459). It is not clear if ginger alters the concentration or effects of losartan when taken continuously. Additionally, this interaction has not been shown in humans.

METRONIDAZOLE (Flagyl) Interaction Rating = Minor Be watchful with this combination. Severity = Mild •  Occurrence = Possible •  Level of Evidence = D Theoretically, ginger might increase levels of metronidazole.  Details In an animal model, ginger increased the absorption and plasma half-life of metronidazole. In addition, the elimination rate and clearance of metronidazole was significantly reduced (20350).

NIFEDIPINE (Procardia) Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = B Ginger may have antiplatelet effects and increase the risk of bleeding if used with nifedipine.  Details Clinical research shows that combined treatment with ginger 1 gram plus nifedipine 10 mg significantly inhibits platelet aggregation when compared to nifedipine or ginger alone (20324).

P-GLYCOPROTEIN SUBSTRATES Interaction Rating = Minor Be watchful with this combination. Severity = Insignificant •  Occurrence = Possible •  Level of Evidence = D Theoretically, ginger might increase the absorption and blood levels of P-glycoprotein (P-gp) substrates.  Details In vitro research shows that ginger inhibits drug efflux by P-gp, potentially increasing absorption and serum levels of P-gp substrates (111544).

PHENPROCOUMON (Marcoumar, others) Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Ginger might increase the risk of bleeding with phenprocoumon.  Details Phenprocoumon, a warfarin-related anticoagulant, might increase the international normalized ratio (INR) when taken with ginger. There is one case report of a 76-year-old woman with a stable INR on phenprocoumon that increased to greater than 10 when she began consuming dried ginger and ginger tea (12880).

WARFARIN (Coumadin) Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = B Ginger might increase the risk of bleeding with warfarin.  Details Laboratory research suggests that ginger might inhibit thromboxane synthetase and decrease platelet aggregation (7622,12634,20321,20322,20323). In one case report, ginger increased the INR when taken with phenprocoumon, which has similar pharmacological effects as warfarin (12880). In another case report, ginger increased the INR when taken with a combination of warfarin, hydrochlorothiazide, and acetaminophen (20349). A longitudinal analysis suggests that taking ginger increases the risk of bleeding in patients taking warfarin for at least 4 months (20348). However, research in healthy people suggests that ginger has no effect on INR, or the pharmacokinetics or pharmacodynamics of warfarin (12881,15176). Until more is known, monitor INRs closely in patients taking large amounts of ginger.

(Read more about GINGER)

ANTICOAGULANT/ANTIPLATELET DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Theoretically, combining peony with anticoagulant or antiplatelet drugs might increase the risk of bleeding.  Details In vitro research suggests that peony might have antiplatelet, anticoagulant, and antithrombotic effects (92787).

CLOZAPINE (Clozaril) Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, peony might increase the levels and clinical effects of clozapine.  Details In vitro research shows that peony suppresses the metabolism of clozapine via weak-to-moderate inhibitory effects on cytochromes P450 (CYP) 1A2 and CYP3A4 (92790). This effect has not been reported in humans.

CONTRACEPTIVE DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, peony might interfere with contraceptive drugs due to competition for estrogen receptors.  Details In vitro and animal research shows that peony extract has estrogenic activity (100990). Concomitant use might also increase the risk for estrogen-related adverse effects.

CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, use of peony may increase the levels and clinical effects of drugs metabolized by CYP1A2.  Details In vitro research shows that peony suppresses the metabolism of clozapine via weak-to-moderate inhibitory effects on CYP1A2 and CYP3A4 (92790). This effect has not been reported in humans.

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, use of peony may increase the levels and clinical effects of drugs metabolized by CYP3A4.  Details In vitro research shows that peony suppresses the metabolism of clozapine via weak-to-moderate inhibitory effects on CYP1A2 and CYP3A4 (92790). This effect has not been reported in humans.

ESTROGENS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, concomitant use of large amounts of peony might interfere with hormone replacement therapy and/or increase the risk for estrogen-related adverse effects.  Details In vitro and animal research shows that peony extract has estrogenic activity (100990). Theoretically, peony might compete for estrogen receptors and/or cause additive estrogenic effects.

PHENYTOIN (Dilantin) Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Probable •  Level of Evidence = D Theoretically, peony might reduce the levels and clinical effects of phenytoin.  Details Animal research shows that taking peony root reduces levels of phenytoin (8657). Some researchers suggest that peony root might affect cytochrome P450 (CYP) 2C9, which metabolizes phenytoin. However, preliminary research in humans shows that peony root does not alter levels of losartan (Cozaar), which is also metabolized by CYP2C9 (11480).

(Read more about PEONY)

ANTICOAGULANT/ANTIPLATELET DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = B High doses of safflower oil might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.  Details Small clinical studies show that taking safflower oil, approximately 55 grams daily for 2-3 weeks, decreases platelet aggregation (72241,72303). However, taking lower doses of safflower oil, such as 5 grams daily for 4 weeks, does not seem to affect platelet function (66267). In one case report, a 74-year-old male stabilized on warfarin developed urinary tract bleeding and an elevated INR after taking a safflower extract 20 grams daily for 14 days (95939).

ANTIDIABETES DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = B Theoretically, safflower oil might alter the effects of antidiabetes drugs.  Details Some clinical research shows that taking safflower oil 10 grams daily for 3 weeks can increase fasting blood glucose in patients with type 2 diabetes (13146). However, clinical research in patients with metabolic syndrome with or without impaired glucose tolerance shows that taking safflower oil 8 grams daily for 12 weeks reduces fasting glucose levels by around 8 mg/dL (108889). Some clinical research also shows that taking safflower oil 8 grams daily for 16 weeks does not affect fasting glucose levels in patients with type 2 diabetes (94039).

WARFARIN Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, safflower oil might increase the risk of bleeding when taken with warfarin.  Details In one case report, a 74-year-old male stabilized on warfarin developed urinary tract bleeding and an elevated INR after taking a safflower extract 20 grams daily for 14 days (95939).

(Read more about SAFFLOWER)

ANTIDIABETES DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, zizyphus might increase the risk of hypoglycemia when taken with antidiabetes drugs.  Details Animal research shows that zizyphus has hypoglycemic activity (87589,87591,87617,87637,87659,87671). However, a small clinical study shows that zizyphus fruit powder does not reduce fasting blood glucose levels in patients with type 2 diabetes (104507).

CNS DEPRESSANTS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Theoretically, zizyphus might cause additive sedative effects when taken with CNS depressants.  Details Some animal research has found that various parts of zizyphus have sedative effects (87572,87644,87646,87658). However, other animal research shows that zizyphus plant extract does not alter sleep parameters when used in combination with pentobarbital (93308).

CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, zizyphus might decrease the levels and clinical effects of drugs metabolized by CYP1A2.  Details Animal research shows that zizyphus induces CYP1A2 enzymes (93311). However, this effect has not been reported in humans.

(Read more about ZIZYPHUS)

General ...Orally, Angelica archangelica is generally well tolerated in food amounts. There is limited information available about the adverse effects of Angelica archangelica when used as medicine.
Most Common Adverse Effects:
Orally: Constipation, photosensitivity.

Dermatologic ...Orally or topically, Angelica archangelica might cause photosensitivity reactions (13406). Patients who take Angelica archangelica orally or apply it topically should be advised to avoid prolonged exposure to the sun. Some constituents of the leaves have a strong irritant effect on the skin and mucous membranes, referred to as "angelica dermatitis" (18).

Gastrointestinal ...Orally, Angelica archangelica has been reported to cause constipation in one out of 21 patients taking a specific Angelica archangelica leaf extract (SagaPro, SagaMedica) (92461).

(Read more about ANGELICA ARCHANGELICA)

General ...Orally, nausea, vomiting, and intestinal paralysis have been reported with calamus use (33310,38458,93980). Tachycardia has also been reported (93980).

Cardiovascular ...Tachycardia has been reported as a toxic effect related to oral use of calamus oil (93980).

Gastrointestinal ...A case of gastrointestinal toxicity has been reported in a 19-year-old male who appeared to use calamus root for its euphoric effects. The man ingested a large amount of the root with water and later presented at the emergency department with continuous vomiting, paleness, and sweating. He was treated intravenously with saline and promethazine (38458). Both nausea and vomiting have been reported in patients using calamus oil orally (93980). Intestinal paralysis has also been reported with calamus use in children (33310).

(Read more about CALAMUS)

General ...Orally, ginger is generally well tolerated. However, higher doses of 5 grams per day increase the risk of side effects and reduce tolerability. Topically, ginger seems to be well tolerated.
Most Common Adverse Effects:
Orally: Abdominal discomfort, burping, diarrhea, heartburn, and a pepper-like irritant effect in the mouth and throat. However, some of these mild symptoms may be reduced by ingesting encapsulated ginger in place of powdered ginger.
Topically: Dermatitis in sensitive individuals.

Cardiovascular ...Orally, use of ginger resulted in mild arrhythmia in one patient in a clinical trial (16306).

Dermatologic ...Orally, ginger can cause hives (17933), as well as bruising and flushing (20316) or rash (20316).
Topically, ginger can cause dermatitis in sensitive individuals (12635,46902).

Gastrointestinal ...Orally, common side effects of ginger include nausea (17933,22602,89898,101761), belching (10380,103359), dry mouth (103359), dry retching (10380), vomiting (10380), burning sensation (10380), oral numbness (22602), abdominal discomfort (5343,89898,96253), heartburn (5343,7624,12472,16306,20316,51845,89894,89895,89898,89899)(101760,101761,101762,111543), diarrhea (5343,101760), constipation (89898,101760,101761), or a transient burning or "chilly hot" sensation of the tongue and throat (52076). Orally, Number Ten, a specific product composed of rhubarb, ginger, astragalus, red sage, and turmeric, can increase the incidence of loose stools (20346).
Four cases of small bowel obstruction due to ginger bolus have been reported following the ingestion of raw ginger without sufficient mastication (chewing). In each case, the bolus was removed by enterotomy. Ginger is composed of cellulose and therefore is resistant to digestion. It can absorb water, which may cause it to swell and become lodged in narrow areas of the digestive tract (52115).

Genitourinary ...In one clinical trial, some patients reported increased menstrual bleeding while taking a specific ginger extract (Zintoma, Goldaru) 250 mg four times daily orally for 3 days (17931). An "intense" urge to urinate after 30 minutes was reported in two of eight patients given 0.5-1 gram of ginger (7624). However, this effect has not been corroborated elsewhere. Dysuria, flank pain, perineal pain, and urinary stream interruption have been reported in a 43-year-old male who drank ginger tea, containing 2-3 teaspoons of dry ginger, daily over 15 years. The adverse effects persisted for 4 years and were not associated with increases in urinary frequency or urgency. Upon discontinuing ginger, the patient's symptoms began to improve within one week and completely resolved after eight weeks, with no relapses six months later (107902).

Immunologic ...In one case report, a 59-year-old Japanese female with multiple allergic sensitivities developed pruritus and then anaphylactic shock after taking an oral ginger-containing herbal supplement for motion sickness (Keimei Gashinsan, Keimeido). The patient had used this supplement previously for over 20 years with no allergic reaction. The authors theorized the development of a cross-reactivity to ginger after the use of an oral supplement containing zedoary and turmeric, which are also in the Zingiberaceae family (102463).

Neurologic/CNS ...Orally, ginger may cause sedation, drowsiness, or dizziness (16306,17933,51845).

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General ...Orally, peony seems to be well tolerated when used alone and as part of Chinese herbal formulas.
Most Common Adverse Effects:
Orally: Abdominal distension, anorexia, diarrhea, gastrointestinal discomfort, nausea.
Topically: Dermatitis.

Dermatologic ...Topically, peony has been reported to cause contact dermatitis (13555).

Endocrine ...Orally, a specific traditional Chinese medicine preparation called DDT has been reported to lower follicle-stimulating hormone (FSH) levels and increase estradiol levels. It is not known if this effect is due to peony or the other ingredients (48404). Another specific traditional Chinese medicine preparation, Toki-shakuyaku-san, has been reported to increase plasma progesterone levels in some patients. It is not known if this effect is due to peony or the other ingredients (15294).

Gastrointestinal ...Orally, peony and total glucosides of peony (TGP) have been reported to cause gastrointestinal discomfort, including abdominal distension, anorexia, diarrhea, and nausea, in some patients (13538,92785,97949,98466,100992). In one clinical study, diarrhea was reported in 5% of patients taking TGP 600 mg three times daily for 24 weeks versus 1% of patients taking placebo (100992).

Hematologic ...Orally, there is one case report of easy gum bleeding, epistaxis, and skin bruising with an international normalized ratio (INR) above 6 in a 61-year-old male who was previously stable on warfarin therapy. This patient had switched from one brand of quilinggao, a popular Chinese herbal product, to another brand 5 days prior. This product contained Fritillaria spp. (beimu), Paeonia rubra, Chinese peony (chishao), Lonicera japonica (jinyinhua), and Poncirus trifoliata (jishi). The patient's INR decreased to 1.9 after temporary withdrawal of warfarin therapy. Upon re-initiation of quilinggao, his INR increased to 5.2. It is not known if the increased INR is due to peony or the other ingredients (68343).

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General ...Orally and intravenously, safflower oil seems to be well tolerated.
Serious Adverse Effects (Rare):
Orally: Liver failure.

Dermatologic ...Intravenously, safflower yellow, a constituent of safflower flower, can cause skin rash (94038,94041). In one case, adjusting the rate of the drip improved the rash (94041).

Hepatic ...Orally, safflower oil has been associated with liver failure. There are at least 7 case reports of acute liver failure requiring liver transplant that are probably associated with over-use of safflower oil, usually for weight loss purposes. However, it is not clear what dose or duration of safflower use led to liver failure in these cases (99138).

Immunologic ...Safflower can cause an allergic reaction in individuals sensitive to the Asteraceae/Compositae family. Members of this family include ragweed, chrysanthemums, marigolds, daisies, and many other herbs.

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General ...Orally, zizyphus fruit extract and powder seem to be well tolerated.

Gastrointestinal ...Orally, zizyphus fruit extract was associated with three cases of mild diarrhea in newborn infants (93306). Zizyphus seed extract was associated with one case of dry mouth and one case of increased bowel movements in a small clinical study (107921).

Neurologic/CNS ...Orally, zizyphus seed extract was associated with two cases of headache in a small clinical study (107921).

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