Acetaminophen
Acetaminophen is an analgesic and antipyretic drug that relieves pain and fever but has limited peripheral anti-inflammatory action.
Prostaglandin: A group of lipid signaling molecules involved in pain, fever, inflammation, and other physiological processes. Acetaminophen may reduce pain and fever partly by limiting prostaglandin production in the central nervous system.
Pain management: The clinical practice of preventing and relieving pain through medicines, procedures, and other interventions. Acetaminophen is widely used for mild to moderate pain and as part of multimodal treatment.
Drug metabolism: The chemical transformation of medicines by enzymes in the body, often changing their activity or elimination. Metabolic pathways determine how acetaminophen is cleared and when toxic products form.
Ibuprofen: A nonsteroidal anti-inflammatory drug used to reduce pain, fever, and inflammation. Ibuprofen generally has stronger peripheral anti-inflammatory action, but carries different gastrointestinal and kidney risks.
Acetaminophen overdose: An excessive acetaminophen exposure that can cause serious, potentially fatal liver injury. It is the main acute safety hazard associated with the drug, including from unrecognized combination products.
Cyclooxygenase: An enzyme family that converts arachidonic acid into prostaglandin precursors. Acetaminophen's effects have been linked to cyclooxygenase activity, though it differs from conventional inhibitors.
Combination drug: A medicine containing two or more active drugs in a single product. Acetaminophen is commonly combined with opioids or other medicines, which can obscure total daily intake.
Glucuronidation: A metabolic reaction that attaches glucuronic acid to a molecule, usually increasing its water solubility. This pathway disposes of much of a therapeutic acetaminophen dose.
Aspirin: A salicylate drug that reduces pain, fever, and inflammation and inhibits platelet function. Aspirin affects platelets and inflammation more than acetaminophen, with distinct bleeding and pediatric risks.
Acute liver failure: A rapid loss of liver function in someone without preexisting advanced liver disease. Severe acetaminophen poisoning can progress to acute liver failure.