High blood pressure

Phytochemical compound present in celery, called coumarins, are able to tone the vascular system, lowering blood pressure and may even be useful in cases of migraines. Celery seed contains chemicals that may thin the blood. That could make the effects of these medications stronger, raising the risk of bleeding. Bloodthinners include aspirin, warfarin (Coumadin), and clopidogrel (Plavix).