Acetaminophen, the active ingredient in Tylenol and its many competitors, is the most widely used OTC, commonly taken to relieve pain or fever. In excessive amounts, acetaminophen can cause severe liver damage.
Acetaminophen, the active ingredient in Tylenol and its many competitors, is the most widely used OTC, commonly taken to relieve pain or fever. In excessive amounts, acetaminophen can cause severe liver damage. Brendan Smialowski Getty Images
Acetaminophen, the active ingredient in Tylenol and its many competitors, is the most widely used OTC, commonly taken to relieve pain or fever. In excessive amounts, acetaminophen can cause severe liver damage. Brendan Smialowski Getty Images