Loxoprofen is a monocarboxylic acid that is propionic acid in which one of the hydrogens at position 2 is substituted by a 4-[(2-oxocyclopentyl)methyl]phenyl group. A prodrug that is rapidly converted into its active trans-alcohol metabolite following oral administration. It has a role as a non-steroidal anti-inflammatory drug, a non-narcotic analgesic, an antipyretic, an EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor and a prodrug. It is a monocarboxylic acid and a member of cyclopentanones. It is functionally related to a propionic acid. It is a conjugate acid of a loxoprofen(1-).
