I have been taking approx. 9 Excedrin Acetaminophen tablets a day (3) tablets, (3) times aday. I did not follow instructions to take a full glass of water with each dose. I also took Excedrin for headaches during this time. I have had a severe back pain for the past ttwo plus weeks. This is from and old police injury. I went to a Chiropractor and dentist yesterday and the Chiroprator solved the back pain.

I took a large swig of Maalox prior to seeing these doctors. I wasn't worried about the dark sttol until my last three movement were black, tarry and smelled bad.
I am 68 years old and other than possible high blood pressure I have had no other problems or symtoms. Las sick day was in the early 8o's.

When should I see a doctor?

Thank you for your time
Paul