following a physical examination and a pretest assessment of pain , ihlc , and the spielberger state-trait anxiety inventory , subjects were randomly assigned in a double-blind fashion to groups receiving placebo ( n = 16 ) , 100 mg of naproxen sodium ( n = 19 ) , or 200 mg naproxen sodium ( n = 19 ) and assessed at 1 , 2 , 3 , and 4 hours .
C0027396
naproxen
C0546873
naproxen sodium