Tylenol can kill you; new warning admits popular painkiller causes liver damage, death. Friday, December 06, 2013 by: Jonathan Benson, staff writer What could happen if I take two Tylenol 3 pills every 4 hours a day? How many acetaminophen pills can kill a person? What happens if you take 4 Tylenol P.M. pills? Tylenol 3 and Tylenol 4 contain codeine, a narcotic painkiller than can get you high. It really depends on the person. Also, codeine causes respiratory depression, and therefore it is possible. Do you think then, in the light of the literature, all parents should be warned that while they can use Tylenol, or paracetamol as as ANALGESIC - or pain relief, that they should never use it for. Can Tylenol kill you? Yes, but if caught early enough, you can prevent or mitigate liver damage. Doing this can literally save your life. Yes, but if caught early enough, you can prevent or mitigate liver damage. Best Answer: As little as 10 grams of acetaminophen can kill a person, the lethal dose has some substantial variability from person to person. The death takes 10 days to three weeks, maybe longer depending on how many tubes the docs can stick in you. To the best of my knowledge, there isn't any dose of. The reason you want to be REALLY careful with acetaminophen is that if you take enough to kill your liver, you won't even know it for 2-3 days, because symptoms of liver failure take that long to manifest. By the time you know anything is wrong, the only think that can save you is a transplant. I am wondering if and how many tylenol 3 or 4 can kill you? no this is not for me i found them hidden in my siblings room and i want to make sure They just changed maximum daily dose of acetaminophen from 4 grams/day to 3 grams/day. Going beyond this maximum dose obviously won't kill you (well I would hope not), but high doses do cause damage to your liver more than other NSAIDS (e.g. Ibuprofen). You can only upload videos smaller than 600MB. You can only upload a photo (png, jpg, jpeg) or a video (3gp, 3gpp, mp4, mov, avi, mpg, mpeg, rm). You can only upload a photo or a video.