Why do i get severe lower intestinal cramps after taking just 1 500mg tylenol? happens 8-10 hours after i take it every time. don't take often either.

There's no clear: link between taking Tylenol and the symptoms you describe. High doses of Tylenol in healthy people can cause liver damage. Normal doses in people with liver problems can cause further damage. However, the liver is in the right upper part of the abdomen, not the lower part. The pain needs to be dealt with as if these two events were simply coincidental.