Why YSK: there are times when you need to not be stinky. A multi-day outing with friends staying in one house comes to mind. Taking bismuth subgallate will make even your vilest poops and farts smell like absolutely nothing. In the US, it’s FDA approved for that purpose and comes in chewable tablets.
Tylenol/acetaminophen/paracetamol is actually very dangerous. Almost surprising that it’s allowed over the counter.
Paracetamol often gets touted as being dangerous as it’s the commonest drug used in intentional overdoses, however its LD50 is around 2g/kg, meaning that a 70kg human would usually need to take about 140g to end their life. Paracetamol is usually sold in 250mg tablets, so this translates to around 560 individual tablets. Toxicity occurs at much lower levels, but this very rarely results in death.
A bigger issue is chronic paracetamol toxicity, which is caused by taking very large amounts daily for an extended period of time. This has significant detrimental effects to the liver and kidneys.
In general though, and certainly by comparison to many other drugs that are prescription-only, it’s quite a safe drug. Death only occurs in roughly 0.1% of all cases of paracetamol toxicity, there is no known risk of addiction, there are very low rates of allergic reactions, and allergic reactions that occur are only very rarely anaphylactic.
That’s why I specifically mentioned it. :)