Loxoprofen sodium is an organic sodium salt having loxoprofen(1-) as the counterion. The parent acid, loxoprofen, is a prodrug that is rapidly converted to its active trans-alcohol metabolite following oral administration. It has a role as a non-steroidal anti-inflammatory drug, a non-narcotic analgesic, an EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor and an antipyretic.