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POSSIBLY EFFECTIVE

• Mastalgia. Meta-analyses of small clinical studies show that vitex agnus-castus moderately reduces breast pain due to cyclic mastalgia. Details: Two small meta-analyses of low-to-moderate quality clinical studies in patients with cyclic mastalgia show that taking vitex agnus-castus moderately reduces breast pain when compared with placebo (101981,111753). The validity of these findings is limited by the heterogeneity of the included studies. Doses of vitex agnus-castus dried fruit extract range from 3.2-40 mg daily, for 2-6 months (90617,96250,101981,111753). Vitex agnus-castus is commonly used in proprietary products, alone or in combination with other herbs (Agnucaston/Cyclodynon, Bionorica AG, Femicur, Mastodynon, Bionorica AG, Monoselect Agnus, ZE 440) (13395).
• Premenstrual syndrome (PMS). Clinical research shows that vitex agnus-castus produces modest improvements in PMS symptoms. Details: Clinical research shows that taking vitex agnus-castus fruit extract orally for 2-6 menstrual cycles seems to reduce symptoms of PMS, especially breast pain or tenderness (mastalgia), edema, constipation, irritability, depressed mood, anxiety, anger, and headache (7055,7076,7078,7079,13394,15065,41483,41489,41490,41494,90619,101981). Doses of fruit extracts have varied from 3.5-40 mg daily, usually for 2-3 menstrual cycles (7055,7076,7078,7079,15065,41483,41489,41490,90619,96435). A meta-analysis of the available clinical research, including 17 studies involving 2,401 patients, shows that taking vitex agnus-castus is comparable to fluoxetine or oral contraceptives, and modestly more effective than placebo, for reducing the symptoms of PMS. A sub-group analysis indicates that efficacy is not impacted by the dose or form used, although the dried powdered berries appear to be ineffective. The low quality of the included studies and the high level of bias and heterogeneity limit the validity of these findings (96435). Another meta-analysis limited to three randomized controlled trials shows that taking vitex agnus-castus increases the likelihood of PMS symptom remission by 2.6-fold over placebo (101979). Some clinical studies have used a specific dried extract of vitex agnus-castus fruit (Agnolyt, Madaus AG) (7076). Other studies used a specific fruit extract known as Ze 440 (Prefemin, Zeller AG), which is standardized to casticin content (7078,90619). Additional studies have used the fruit extract BNO 1095 (Agnucaston/Cyclodynon, Bionorica AG) (15065,41483,41489,41490).

POSSIBLY INEFFECTIVE

• Fractures. Limited evidence suggests that vitex agnus-castus does not improve fracture healing rates. Details: Clinical research shows that taking a specific vitex agnus-castus dried fruit extract (Agnugol, Goldaru Pharmacy Company) 4 mg, alone or in combination with magnesium oxide (Nature Made Company) 250 mg, daily for 8 weeks does not improve long bone fracture healing when compared with placebo (90618).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Acne. Although there is interest in using oral vitex agnus-castus for acne, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Aging skin. Vitex agnus-castus has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A clinical trial in postmenopausal adults with wrinkles shows that taking one capsule orally daily of a combination of vitex agnus-castus 400 mg, evening primrose oil 500 mg, soy isoflavones 100 mg, and black cohosh 520 mg (Estosalus, Max Biocare Pty Ltd) for 12 weeks improves skin elasticity, skin smoothness, and wrinkle density scores when compared with placebo (109440).
• Amenorrhea. Although there is interest in using oral vitex agnus-castus for amenorrhea, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Anxiety. Although there is interest in using oral vitex agnus-castus for anxiety, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Benign prostatic hyperplasia (BPH). Although there is interest in using oral vitex agnus-castus for BPH, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Dementia. Although there is interest in using oral vitex agnus-castus for dementia, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Dysmenorrhea. It is unclear if oral vitex agnus-castus is beneficial in patients with dysmenorrhea. Details: Preliminary clinical research in patients with primary dysmenorrhea shows that taking a specific vitex agnus-castus extract (Agnucaston, Bionorica AG) daily for 3 months reduces pain, as measured on a visual analog scale, similarly to ethinyl estradiol 0.03 mg / drospirenone 3 mg (Yasmin) taken daily (104975).
• Fibrocystic breast disease. Although there is interest in using oral vitex agnus-castus for fibrocystic breast disease, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Hyperprolactinemia. Although there is interest in using oral vitex agnus-castus for hyperprolactinemia, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Infertility. It is unclear if oral vitex agnus-castus is beneficial for female infertility. Details: Preliminary clinical research in infertile females with oligomenorrhea or amenorrhea shows that taking homeopathic vitex agnus-castus (Phyto Hypophyson L, Steierl-Pharma GmbH) 50 drops orally three times daily for 3 months does not increase the chance of getting pregnant (41470). Also, one small clinical study in those with infertility due to secondary amenorrhea or luteal insufficiency shows that taking a vitex agnus-castus preparation (Mastodynon, Bionorica GmbH, Neumarkt/Opf.) 30 drops twice daily for at least 3 months does not increase the chance of pregnancy when compared with placebo, although the study was likely inadequately powered to detect a difference (7077).
• Insect repellent. Limited research suggests that topical vitex agnus-castus has insect repellent activity. Details: Preliminary clinical research shows that applying a carbon dioxide extract of vitex agnus-castus seeds seems to repel ticks and fleas for 6 hours, mosquitoes for 3-8 hours, and biting flies for 3 hours (13396). It is unclear how this compares with commonly used insect repellants.
• Insomnia. Although there is interest in using oral vitex agnus-castus for insomnia, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Lactation. Although there is interest in using oral vitex agnus-castus for stimulating lactation, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Menopausal symptoms. Clinical research suggests that vitex agnus-castus can relieve some menopausal symptoms; however, most research uses vitex agnus-castus in combination with other treatments. Details: Clinical research shows that taking vitex agnus-castus extract 15 mg twice daily for 8 weeks improves some menopausal symptoms, including anxiety and vasomotor dysfunction, by 76% and 88%, respectively, when compared with baseline. However, there was no effect on depression or sexual dysfunction (101980). Vitex agnus-castus has also been studied as a component of combination products. Preliminary clinical research shows that taking a combination of vitex agnus-castus, equivalent to 1000 mg dried fruit, black seed powder 500 mg, and citalopram 20 mg daily for 8 weeks reduces vasomotor, psychosocial, and physical symptoms of menopause when compared with citalopram alone (100325). Other preliminary clinical research shows that taking one capsule orally daily of a combination of vitex agnus-castus 400 mg, evening primrose oil 500 mg, soy isoflavones 100 mg, and black cohosh 520 mg (Estosalus, Max Biocare Pty Ltd) for 12 weeks moderately reduces the severity of hot flashes, sweating, sleep problems, depressed mood, and irritability when compared with placebo. There was no effect on plasma lipids, joint discomfort, anxiety, exhaustion, or sexual problems (105102). It is unclear if these effects are due to vitex agnus-castus, other ingredients, or the combination.
• Menorrhagia. It is unclear if oral vitex agnus-castus is beneficial in patients with menorrhagia. Details: A meta-analysis of two moderate quality clinical trials in patients who had heavy menstrual periods shows that taking vitex agnus-castus does not reduce menstrual bleeding over the next 1-2 menstrual cycles when compared with placebo (101982). However, preliminary clinical research in patients using an intrauterine device (IUD) shows that taking vitex agnus-castus three times daily for 8 days, starting on the first day of menstruation, and repeated for four consecutive menstrual cycles, reduces the amount of bleeding by approximately 48% when compared with baseline. This reduction was similar to the effects of mefenamic acid 250 mg daily after 4 months, although treatment with mefenamic acid was superior during the first three months (90620).
• Migraine headache. Although there is interest in using oral vitex agnus-castus for migraine headache, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Polycystic ovary syndrome (PCOS). Vitex agnus-castus has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Preliminary clinical research in patients with oligomenorrhea due to PCOS shows that taking a traditional combination product (Aslagh) containing equivalent amounts of essential oils of vitex agnus-castus fruit, fennel, and wild carrot seeds orally daily for 3 months, either alone or in combination with metformin, improves rates of menstrual bleeding and menstrual cyclicity similarly to metformin alone. All three groups experienced a significant improvement from baseline. Aslagh was taken as two, 500-mg capsules twice daily, except during menses; metformin was titrated over one week to a dose of 500 mg three times daily (108974).
• Premenstrual dysphoric disorder (PMDD). Limited evidence suggests that vitex agnus-castus might improve symptoms of PMDD. Details: In a clinical trial, vitex agnus-castus 20-40 mg daily for 8 weeks was similar to fluoxetine 20-40 mg daily for relieving symptoms of PMDD. About 58% of patients responded to vitex agnus-castus, compared to about 68% of patients taking fluoxetine. Vitex agnus-castus was more effective for physical symptoms such as breast tenderness, swelling, cramps, and food cravings (12207,41493).
• Rheumatoid arthritis (RA). Although there is interest in using oral vitex agnus-castus for RA, there is insufficient reliable information available about the clinical effects of vitex agnus-castus for this condition.
• Sexual dysfunction. It is unclear if oral vitex agnus-castus is beneficial in patients with sexual dysfunction. Details: Preliminary clinical research in healthy females under 44 years of age with sexual dissatisfaction shows that taking a specific vitex agnus-castus product (Agnugol, Goldaru Herbal Pharmaceutical Company) 3.2-4.8 mg orally once daily for 16 weeks modestly improves scores of sexual satisfaction, function, arousal, and desire when compared with placebo (109437). Additionally, a moderate-sized clinical study in females 50-69 years old with sexual dysfunction conducted in Iran shows that taking vitex agnus-castus 40 drops daily for 8 weeks improves sexual dysfunction scores from mild dysfunction to no dysfunction at 6 and 8 weeks when compared with placebo but does not improve scores at 4 weeks (112361). More evidence is needed to rate the effectiveness of vitex agnus-castus for these uses.

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LIKELY SAFE ...when the fruit extract is used orally and appropriately, short-term. Vitex agnus-castus fruit extract has been used safely in studies at doses up to 40 mg daily, for up to 3 months (7055,7076,7077,7078,7079,12207,13393,15065,90617,90618,96435). There is insufficient reliable information available about the safety of vitex agnus-castus seeds when used orally or topically.

PREGNANCY AND LACTATION: POSSIBLY UNSAFE
when used orally. Theoretically, the hormonal effects of vitex agnus-castus might adversely affect pregnancy or lactation (10979,11456,13393,109439). Animal research shows that taking vitex agnus-castus fruit extract when planning to become pregnant or during pregnancy may increase the risk of infertility, low fetal body weight, abortion, and stillbirth (109439); avoid using.

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ANTIPSYCHOTIC DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, vitex agnus-castus could interfere with the activity of antipsychotic drugs.  Details Vitex agnus-castus might interfere with the action of dopamine antagonists such as antipsychotic drugs due to its dopamine agonist effects (7014,7015).

CONTRACEPTIVE DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = B Theoretically, vitex agnus-castus could interfere with oral contraceptives.  Details Vitex agnus-castus might interfere with the efficacy of oral contraceptives due to possible hormone modulating activity (10979,11456).

DOPAMINE AGONISTS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, vitex agnus-castus could interfere with dopamine agonists.  Details Vitex agnus-castus might potentiate the actions of dopaminergic agonists due to possible dopaminergic effects (10122).

ESTROGENS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Probable •  Level of Evidence = D Theoretically, vitex agnus-castus could interfere with the activity of estrogens.  Details Vitex agnus-castus has hormone modulating activity that can interfere with the efficacy of hormone replacement therapy (10979,11456).

METOCLOPRAMIDE (Reglan) Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, dopaminergic effects of vitex agnus-castus could interfere with metoclopramide.  Details Vitex agnus-castus might interfere with the action of dopamine antagonists such as metoclopramide due to its possible dopaminergic effects (7014,7015).

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General ...Orally, vitex agnus-castus is generally well tolerated.
Most Common Adverse Effects:
Orally: Diarrhea, fatigue, headache, insomnia, irregular menstruation, nausea, skin irritation, stomach pain, vomiting.

Dermatologic ...Orally, skin conditions such as itching, irritation, urticaria, rash, acne, eczema, and hair loss have been reported (7055,7076,7078,7079,12207,13393,15065,90617,90619,101981).

Gastrointestinal ...Orally, gastrointestinal upset or pain, diarrhea, and nausea and vomiting, have been reported (7079,12207,13393,15065,90620,101981,101982). In one clinical trial, a single patient reported persistent gastroenteritis while taking vitex agnus-castus (7076). Orally, development of a bezoar resulting in colonic obstruction is described in a 63-year-old male who consumed an unknown amount of vitex agnus-castus seeds (111752).

Genitourinary ...Orally, irregular or prolonged menstrual bleeding has been reported (7055,7079,12207,13393,15065,41489,41490,95326).

Hematologic ...Orally, nosebleed has been reported in a single patient in a clinical trial (7079).

Immunologic ...Orally, multiple abscesses have been reported in a single patient (7055).

Neurologic/CNS ...Orally, headache, fatigue, and insomnia (7076,7078,12207,13393,13395,15065), confusion (90617), and vertigo (7079) have been reported.

Other ...Orally, weight gain has been reported (12207,13393,15065).

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