Be careful with Tylenol. I’ve had it 3 times and passed out cold each time. Twice in the dentist office and once the ER. Every time I tell a doctor they laugh and say it can’t happen.
I guess what they should have said is that is not a known side effect.
Tylenol does not affect receptors that would cause most people to fall asleep. It doesn’t work like an antihistamine or opioid.
I’ve never heard of that reaction. I DO know that a couple of Extra strength Tylenol with some ibuprofen and it killed some root canal pain.