to study once-daily antimicrobial prophylaxis of urinary tract infections , we gave trimethoprim-sulfamethoxazole ( 40 mg/200 mg ) , trimethoprim ( 100 mg ) , nitrofurantoin macrocrystals ( 100 mg ) , or placebo to 60 women for 6 months .
C0041044
trimethoprim-sulfamethoxazole
C0041041
trimethoprim