Loxoprofen Sodium is a non-selective cyclooxygenase inhibitor, a nonsteroidal anti-inflammatory drug (NSAID) working by reducing the synthesis of prostaglandins from arachidonic acid.
Loxoprofen sodium, an anti-inflammatory prodrug (NSAID), is a nonselective COX inhibitor with IC50s of 6.5 μM and 13.5 μM for COX-1 and COX-2 in human whole blood assays, respectively[1]. Both loxoprofen sodium and celecoxib were well tolerated for the relief of acute postoperative pain after spinal surgery. A single administration of loxoprofen showed superior and rapid effectiveness compared with celecoxib for both slight and severe postoperative pain[2]. In a rat air pouch model, oral administration of loxoprofen sodium lowered prostaglandin (PG) E2 in both fluid exudates of the inflammatory pouch and stomach tissue with ED50 values of 2.0 and 2.1 mg/kg, respectively. Additionally, platelet thromboxane B2 production was also inhibited by loxoprofen sodium (ED50 of 0.34 mg/kg). In a rat carrageenan-induced paw edema model, loxoprofen sodium dose-dependently reduced the paw edema, accompanied by a decrease in PGE2 content in inflamed paw exudates[3].
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