Summary
Acetaminophen usually lasts about 4 hours for pain relief and fever reduction
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, so adults and teenagers should take 325 or 500 milligrams (mg) every 3 or 4 hours, 650 mg every 4 to 6 hours, or 1000 mg every 6 hours as needed.
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The maximum daily dose of Tylenol (acetaminophen) is 3 grams (3,000 mg) in adults.
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Taking too much acetaminophen can be deadly because it can lead to hepatotoxicity (liver toxicity).
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Acetaminophen is an effective mild pain reliever with a low risk of side effects.
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According to
