Metabolite I, formed by hydroxylation of the methyl group, and its glucuronide conjugates accounted for 50 to 60 per cent of radioactivity in urine (approximately 35 per cent of dose). This metabolite possesses pharmacologic activity equal to one-fifth that of meclofenamic acid in an in vim system which measures inhibition of bovine seminal vesicle cyclo~xygenase.
