Passionflower

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Passionflower Side Effects, Interactions and Warnings



  • Passionflower supplies variable quantities of vitamin K and can lessen the effect of oral anticoagulant therapy.
    - Oral anticoagulants and medicinal plants. An emerging interaction -- Argento A, Tiraferri E, Marzaloni M. -- Ann Ital Med Int. 2000 Apr;15(2):139-43.

  • Passionflower may increase the risk of bleeding or potentiate the effects of warfarin therapy.
    - Am J Health Syst Pharm 2000 Jul 1;57(13):1221-7; quiz 1228-30 -- Potential interactions between alternative therapies and warfarin. -- Heck AM, DeWitt BA, Lukes AL. -- School of Pharmacy and Pharmacal Sciences, Purdue University, Indianapolis, IN, USA.

  • Passionflower may potentiate the effects of antiepileptic medications, increasing their sedative and cognitive effects.
    - 2001 Dec;2(6):524-532 -- Herbal Medicines and Epilepsy: The Potential for Benefit and Adverse Effects. -- Spinella M.







last update: March 2014



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