Okay, so I just found out that my roommate seems to think that taking 2 times the suggested dosage of extra strength Tylenol PM is okay because he has taken the stuff all his life, and it has never effected him. I tried telling him that taking 4000 mgs of this stuff in a 24 hour period is not only BAD, but extra strength has been proven to expedite liver failure. He said that as a kid he was taking adult medicine for migraines (He had a sort of extreme migraine syndrome). I am genuinely worried. He keeps blowing me off, and get's all huffy because it hasn't affected him. Honestly he also seems to have kidney trouble. He's a tough guy, but over dosing daily is just going to bring bad stuff his way. He really seems to think that because he's taken this stuff so much that he doesn't feel the effect, so the only logical thing to do is take more to compensate. I'n no medical expert, but I can read the health and safety warnings.