Which herb commonly interacts with anticoagulants, antiplatelets, and anticonvulsants?

• A. Ginkgo biloba
• B. Gymnema sylvestre
• C. Hydrastis canadensis
• D. Humulus lupulus

Answer: (A)

Ginkgo biloba is the herb most commonly cited for interactions with anticoagulants, antiplatelets, and anticonvulsants. Its leaves have antiplatelet effects, which can elevate bleeding risk when used alongside prescription anticoagulants (like warfarin or heparin) or other antiplatelet drugs (such as aspirin or clopidogrel). Because of this, adding Ginkgo to a regimen that already includes blood thinners can increase the chance of unusual or excessive bleeding.

There are also cautions about interactions with anticonvulsants, where co-use may influence seizure control or drug metabolism in some cases, so careful monitoring is advised for individuals taking anti-seizure medications.

The other herbs listed don’t share this well-documented combination of antiplatelet/anticoagulant and anticonvulsant interaction profiles. Gymnema sylvestre is primarily noted for blood sugar effects; Hydrastis canadensis (goldenseal) interacts mainly through enzyme inhibition in broader drug metabolism contexts; Humulus lupulus (hops) has sedative CNS effects but not a characteristic pattern with anticoagulants, antiplatelets, and anticonvulsants.