I am sorry about your Mom. Losing a loved one is never easy.
However, Coumadin is a drug that has been around for a long time. It is prescribed for blood clots. If Coumadin has a synergistic action with Tylenol, I am not aware-- Tylenol in excessive doses is toxic to the liver. Consumers need to understand that there is not a drug--including aspirin, that does not have side effects. It is up to the patient/consumer to be informed. If the doctor was not regularly monitoring her clotting and bleeding time, he was the one that was negligent--not the drug company.
It was on the world news. Must have been ABC, NBC, or CBS. We didn't have the cable then. Mom had been gone for about a year. When I heard it, I'll admit I was a little pis*ed.
(Thanks for the condolences.)