Apparently, We Don't Actually Know How This Common Pain Reliever Works

07/23/2014 10:32 am ET | Updated Jul 23, 2014

Acetaminophen -- perhaps known best by the brand name Tylenol, and overseas as paracetamol -- is so widely used, that surely we must know how exactly it works, right?

Believe it or not, experts are actually not 100 percent sure how the drug works to relieve pain, just that it does. The best working theories are explained in the video above, produced by the American Chemical Society.

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