patients with moderate to severe acne vulgaris were treated for 10 weeks with either topical clindamycin phosphate ( 1 % solution ) twice daily , benzoyl peroxide ( 5 % gel ) twice daily , or benzoyl peroxide ( 5 % gel ) in the morning and clindamycin phosphate ( 1 % solution ) in the evening .
C0001144
acne vulgaris
C0055881
clindamycin phosphate