Aspirin or aspirin-containing products
Ibuprofen (Advil, Motrin, others) or naproxen (Aleve, Anaprox)
Acetaminophen (Tylenol, others) or acetaminophen-containing products, especially when the dose of acetaminophen exceeds 1,500 milligrams a day
Many antibiotics
Heparin
Cold or allergy medicines
Birth control pills
Medications that treat abnormal heart rhythms, such as amiodarone
Being on Coumadin, which is life saving to people facing the severity of blood clots, is complicated because so many prescriptions, over-the-counter (OTC) medications and even foods can affect its ability (or inability) to thin the blood, which could cause serious problems for those people taking Coumadin who also need to take something else – for example to relieve a headache or soothe a cough. What may be a routine trip to the drug store for most people becomes complicated if not dangerous for those of us taking blood thinners