Precautions
People with allergies to chamomile, ragweed, or yarrow may be allergic to feverfew and should not take it. Do not take if pregnant. Feverfew may increase the risk of bleeding, especially if you take blood-thinning medications, such as warfarin (Coumadin), clopidogrel (Plavix), or aspirin. It is recommended to slowly lower the dose of feverfew rather than stopping all at once.
Precautions