April 2016

New Study Suggests Bleeding Risk from Ginkgo-Warfarin Interaction

New research shows that taking ginkgo while on the anticoagulant drug warfarin significantly increases the risk for bleeding by 38%. While this potential interaction had already been identified, existing research had not yet confirmed the ginkgo-anticoagulant interaction. It had been primarily discussed in case reports. This new study analyzes data from the Veterans Administration (VA) Informatics and Computing Infrastructure medical records database, providing a larger sample size of patients who confirmed the combined use of ginkgo and warfarin as well as data on bleeding events associated with their use.


  1. Stoddard GJ, Archer M, Shane-McWhorter L, et al. Ginkgo and Warfarin Interaction in a Large Veterans Administration Population. AMIA Annu Symp Proc. 2015; 2015: 1174-1183.

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