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Acetaminophen is a nonopioid pain reliever and fever reducer sold in numerous over-the-counter and prescription products. It is used for headaches, muscle aches, backaches, minor arthritis pain, toothaches, menstrual cramps, discomfort from the common cold, and fever. Acetaminophen comes in tablets, capsules, liquids, suppositories, and intravenous forms. Product strengths and dosing directions differ by formulation and age.
read more about acetaminophen ...The exact way acetaminophen relieves pain and reduces fever is not fully established. Its actions are thought to occur mainly within the central nervous system, where it affects pathways involved in pain signaling and body-temperature regulation. Unlike nonsteroidal anti-inflammatory drugs, acetaminophen has little peripheral anti-inflammatory activity at standard doses. Its clinical role centers on pain relief and fever reduction.
Over-the-counter acetaminophen temporarily relieves minor aches and pains from headaches, muscle aches, backaches, minor arthritis pain, colds, toothaches, and premenstrual or menstrual cramps. It also reduces fever. Some prescription products pair acetaminophen with other medicines for selected types of pain, while intravenous acetaminophen is used in clinical settings for pain and fever under medical supervision.
Acetaminophen is taken according to the strength, formulation, age, and dosing directions on the product label or prescription. Adults should not exceed the total daily amount stated for the product and should count acetaminophen from combination medicines toward that total. Taking more than 4,000 mg in 24 hours raises the risk of severe liver injury. Lower product-specific limits still apply.
Acetaminophen is generally well tolerated at labeled doses, but excessive amounts can cause severe liver injury. Risk rises when several acetaminophen-containing products are taken together or when heavy alcohol use is present. Rare serious skin reactions and allergic reactions have also been reported. Yellowing of the skin or eyes, severe rash, swelling, breathing trouble, or suspected overdose needs prompt medical care.
Tylenol is a well-known product name for medicines that contain acetaminophen. Acetaminophen is also sold under generic labels and in combination products.
No. Acetaminophen relieves pain and reduces fever, but it has little peripheral anti-inflammatory activity compared with nonsteroidal anti-inflammatory drugs.
An overdose can cause severe liver injury and death. Suspected overdose needs immediate medical attention, even when early symptoms seem mild or absent.
Yes, but combination products sometimes contain acetaminophen too. Checking active ingredients helps prevent accidental double dosing and excessive total daily intake.
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Acetaminophen. MedlinePlus. https://medlineplus.gov/druginfo/meds/a681004.html. Date Accessed September 11, 2026.
Acetaminophen. StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK482369/. Date Accessed September 11, 2026.
DailyMed - ACETAMINOPHEN tablet. https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=537219ac-552a-a30e-e063-6394a90aa9d1. Date Accessed September 11, 2026.
DailyMed - OFIRMEV (acetaminophen) injection, solution. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=9a38f63a-8852-6dab-e053-2a95a90a90d6. Date Accessed September 11, 2026.