Metamizole (INN) or dipyrone (BAN USAN) is a ampyrone sulfonate analgesic (pain reliever) antispasmodic (spasm reliever) and antipyretic (fever reducer) similar to paracetamol in that it has minimal anti-inflammatory effects and which is most commonly given orally or parenterally (by injection) to prevent and treat pain related to surgery or for the treatment of acute pain.
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