Not necessarily from lortab, but my boyfriend has been taking pai...

Not necessarily from lortab, but my boyfriend has been taking pain pills, and i am worried. Recently he has been bleeding from his butt. He went to the doctors, it is not hemirroids, its not a sexual transmitted disease. What I want to know is: I have heard that acetaminophen causes liver damage and damage to other organs. It is possible that him eating these pain pills could be causing him to bleed? Maybe the pills are deteriating his organs or something, maybe making them bleed. Do pain pills have these serious effects? I would really appreciate a response. Thank you. Shannon @ sissyshay143@yahoo.com