The ingredients in Tylenol besides acetaminophen are cornstarch, magnesium stearate, powdered cellulose, pregelatinized starch and sodium starch glycolate, as of 2015, states Tylenol. Extra-strength caplets also contain carnauba wax, castor oil, FD&C red no. 40 aluminum lake, hypromellose, and polyethylene and propylene glycols, as well as shellac and titanium dioxide.
Consumers should not take Tylenol with any other drug that contains acetaminophen, and they should not take it if they are allergic to acetaminophen or any of Tylenol's inactive ingredients, according to DailyMed. Acetaminophen relieves mild-to-moderate pain by raising the body’s general threshold for pain, and it lowers fever by helping the body discharge excess heat, explains Tylenol.