Tylenol is a trusted over-the-counter pain reliever and fever reducer containing acetaminophen as its active ingredient. Widely used in the United States, Tylenol helps relieve headaches, muscle aches, back pain, toothaches, menstrual cramps, arthritis pain, and cold or flu symptoms. Available in Regular Strength (325 mg), Extra Strength (500 mg), and 8-Hour Extended Release (650 mg) formulations, Tylenol provides reliable pain relief for adults and children when used as directed. Unlike some other pain relievers, acetaminophen is gentle on the stomach, making Tylenol a popular choice for everyday pain management and fever control.