Well what do you expect from one of the most deadly poisons ever invented? Even analine dye, which is terribly poisonous, isn't as bad because poisoning by it can be treated. Acetaminophen poisoning will kill you after five days of the most horrendously painful and horrible symptoms ever, first, and there's no effective antidote for it.
Actually, I should have said there's no effective painless antidote for it. They can,m of course, stuff a long needle in your liver and if you then survbive you'll be permanently damaged. Anyone thinking of ending it via tylenol ought to know it might not work, and they'll be dependant on others the rest of their lives.
"It's the best thing since professional golfers on 'ludes." -- Rick Obidiah