eighty-nine men with gonococcal urethritis were randomly treated with trimethoprim-sulfamethoxazole , four tablets ( trimethoprin , 320 mg , and sulfamethoxazole , 1,600 mg ) twice daily for two days , or ampicillin , 3.5 g , plus probenecid , 1 g , in a single dose .
C0041044
trimethoprim-sulfamethoxazole
C0038689
sulfamethoxazole