Pharmacokinetics of naproxen sodium.

Naproxen sodium is a drug characterized by rapid and complete absorption after oral administration, highly protein-bound distribution, relatively simple metabolism, and renal excretion. Its pharmacokinetics are little affected by food, by dosage levels (within wide limits), or by mild renal impairment. The main mechanism of naproxen sodium action, inhibition of prostaglandin synthesis, makes the drug effective in combating pain and inflammation, while its relatively long half-life permits a two times daily dosing. The drug is well tolerated by most patients.