Herbal product	Interacting drugs
Ginkgo biloba	Aspirin, warfarin (Coumadin), ticlopidine (Ticlid), clopidogrel (Plavix), dipyridamole (Persantine)
St. John' s wort	Antidepressants
Ephedra	Caffeine, decongestants, stimulants
Ginseng	Warfarin
Kava	Sedatives, sleeping pills, antipsychotics, alcohol