It is reported in the literature that the plasma concentration of this product reaches its peak at 15 minutes after intravenous injection, and its half-life (t 1/2) is 12- 14 hours. When the therapeutic concentration is reached in vivo, 99% of naproxen binds to plasma protein, and 95% of the product is excreted from urine in the form of naproxen or its metabolite 6-O- demethylnaproxen and their combinations. It can be excreted from milk through the placenta. It does not affect the metabolism of various enzymes and has no accumulation in the body.