I've always had an (unreasonable?) dislike of Paracetamol/Tylenol ever since I found out it was the #1 cause of acute liver failure in the US. Liver failure is scary. https://en.wikipedia.org/wiki/Paracetamol_poisoning
As with all things, the poison is in the dose. A tonne of incredibly useful medicine can kill you if dosed incorrectly.
Since it’s a mild and really common painkiller, sometimes seen as not dangerous, someone uneducated about it who is really suffering could easily take 3 or 4 times the dose.
Unlike a lot of drugs, you are not going to have a lot of immediate side effects if you overdose on paracetamol. You’ll just horribly die some days after,