I had to go look this one up, and it surprised me actually, that according to Wikipedia anyway, the reason Tylenol helps with pain is not fully understood. To quote them:
“Despite its common use, the mechanism of action of paracetamol is not completely understood. (paracetamol is another word for Tylenol)”
Advil is an anti-inflammatory. It works by reducing inflammation in your body, which reduces pain.
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