How does garlic interact with other medications and foods?

Because garlic can reduce your blood's clotting ability, other prescription, over-the-counter, and herbal drugs that accomplish the same goal may amplify this effect, resulting in increased danger when bleeding. These include antiplatelets (clopidogrel and ticlopidine), anticoagulants (heparin and warfarin), aspirin, ibuprofen, naproxen, danshen, devil's claw, eleuthero, ginger (in large amounts), ginkgo, horse chestnut, panax ginseng, papain, red clover, and saw palmetto. Drugs to treat HIV/AIDS may not work as effectively if taken with garlic. Also avoid taking garlic while you are on these other medications: Isoniazid, Saquinavir, birth control pills, cyclosporine, and any drugs processed through the liver.