Tylenol

What is the active ingredient in Tylenol?

Tom took some Tylenol.

Tylenol has no effect on me.

You don't happen to have some Tylenol on you, do you?

But what about reducing pain? Aspirin competes with other medicines for reducing pain and high body temperature. The competition includes acetaminophen, the active substance in products like Tylenol. It also includes ibuprofen, the active substance in products such as Advil. Like ibuprofen, aspirin is an NSAID — a non-steroidal anti-inflammatory drug.

Top U.S. health officials urged pregnant women not to use acetaminophen, the active ingredient in Tylenol, claiming it could cause autism, though studies have been inconclusive.