Anti-inflammatory effects of meloxicam are believed to be due to inhibition of prostaglandin synthetase (cylooxygenase), leading to the inhibition of prostaglandin synthesis. As prostaglandins sensitize pain receptors, inhibition of their synthesis may be associated with the analgesic and antipyretic effects of meloxicam.
Meloxicam is an nonsteroidal anti-inflammatory drug (NSAID) with analgesic and antipyretic properties. Prostaglandins are substances that contribute to inflammation of joints. Meloxicam inhibits prostaglandin synthetase (cylooxygenase 1 and 2) and leads to a decrease of the synthesis of prostaglandins, therefore, inflammation is reduced.
Meloxicam is almost completely metabolized into inactive metabolites by the cytochrome P450 (CYP450) isozymes. CYP2C9 is primarily responsible for metabolism of meloxicam while CYP3A4 plays a minor role. An intermediate metabolite, 5'-hydroxymethyl meloxicam, is further metabolized to 5'-carboxy meloxicam, the major metabolite. Peroxidase activity is thought to produce the two other inactive metabolites of meloxicam.
LD50, Acute: 84 mg/kg (Rat); Oral 470 mg/kg (Mouse); Oral 320 mg/kg (Rabbit)