three dosage schedules of naproxen -- 1000 mg in the morning and placebo in the evening , 1000 mg in the evening and placebo in the morning , and 500 mg in the morning and again in the evening -- were compared for efficacy in treating rheumatoid arthritis in a 13-week , double-blind , crossover study .
C0027396
naproxen
C0003873
rheumatoid arthritis