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Medically reviewed by Kovalenko Svetlana Olegovna, PharmD. Last updated on 25.05.2022
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Reduction of fever. Relief of aches & pains associated w/ flu, common colds, tonsilitis, teething pains & post-immunization reactions.
Hypersensitivity, active peptic ulcer or GI bleeding, history of allergic responses to aspirin or other NSAIDs, acute porphyria
Acetaminophen is metabolized (eliminated by conversion to other chemicals) by the liver. Therefore drugs that increase the action of liver enzymes that metabolize acetaminophen [for example, carbamazepine (Tegretol), isoniazid (INH, Nydrazid, Laniazid), rifampin (Rifamate, Rifadin, Rimactane)] reduce the levels of acetaminophen and may decrease the action of acetaminophen. Doses of acetaminophen greater than the recommended doses are toxic to the liver and may result in severe liver damage. The potential for acetaminophen to harm the liver is increased when it is combined with alcohol or drugs that also harm the liver.
Cholestyramine (Questran) reduces the effect of acetaminophen by decreasing its absorption into the body from the intestine. Therefore, acetaminophen should be administered 3 to 4 hours after cholestyramine or one hour before cholestyramine.
Acetaminophen doses greater than 2275 mg per day may increase the blood thinning effect of warfarin (Coumadin) by an unknown mechanism. Therefore, prolonged administration or large doses of acetaminophen should be avoided during warfarin therapy
GI disturbances, nephrotic syndrome, epigastric pain, nausea, vomiting, diarrhoea, hepatitis, rash, pruritus, wheezing, bronchospasm, prolonged bleeding time.
Potentially Fatal: Bleeding or perforation through peptic ulcer, rarely blood dyscrasia or anaphylaxis, acute renal failure.