The mechanism of action for Tylenol is mostly known and regardless it is not uncommon to have medicines with an unknown mechanism approved (e.g. gabapentin).
Furthermore, the mechanism of harm you quote is not, in fact, a known one. Frankly, I can’t tell where you pulled that from. The primary mechanism of harm is liver damage from prolonged use.
Finally, the association with autism is still under debate and I see several possible confounding effects in the current research.
Your post is incredibly misinformative and you should not be talking about anything medical science related if you know this little. You could get people hurt if they listen to you.
Tylenol does NOT have anti-inflammatory properties. Ibuprofen is a better in many different ways.
However, surely this dosage would be radically different between different people: a 40kg woman is not like a 100kg man.
And finally, if this drug is SO dangerous if you have a little too much of it, I have zero confidence that it's at all safe at ANY normal dosage (esp. since the dangerous dosage is very close to the normal prescribed dosage; it's not like you have to down a whole bottle at once to have a big problem). I simply don't see how this drug should even be legal for OTC use, or why it should be used at all in most situations when there's better and safer alternatives: aspirin, ibuprofen, etc. Personally, I'm simply not going to take the risk. Why bother?
"pa-ruh-SEE-tuh-mol", with the "pa" being like the "ma" in "marriage".
But the mechanism of harm is known: disruption of the “electron transport chain” in the mitochondria.
Prenatal Tylenol is now well-associated with autism. I have a friend who I talked out of using Tylenol daily - she’s doing much better.
Edit: spelling (comment below)