one hundred sixty-five subjects completed a 10-week , double-blind controlled study comparing the following : ( 1 ) a combination of 3 % erythromycin and 5 % benzoyl peroxide in a gel , ( 2 ) 5 % benzoyl peroxide gel , ( 3 ) 3 % erythromycin gel , and ( 4 ) the gel vehicle .
C0974925
5
C0005088
benzoyl peroxide