I Built a Free Herb-Drug Interaction Checker —...

Why I Built This Last year, my grandmother was taking warfarin (a blood thinner) and started drinking chamomile tea daily because she read it was "calming." What she didn't know — and what her doctor didn't mention — is that chamomile can increase warfarin's anticoagulant effect, raising the risk of dangerous bleeding. This isn't rare. A 2019 systematic review found that 40% of adults in the Americas use some form of herbal supplement, and many don't tell their doctors. The interaction data exis