Clindamycin phosphate is a water soluble ester of the semi-synthetic antibiotic produced by a 7 (S)- chloro-substitution of the 7 (R)-hydroxyl group of the parent antibiotic lincomycin. The solution contains isopropyl alcohol 50% v/v, propylene glycol, purified water and sodium hydroxide. Topical clindamycin is commonly used to treat acne vulgaris. Acne vulgaris is a common type of acne that causes blackheads, whiteheads, and other types of pimples on your skin. A randomized, double-blind comparison of a clindamycin phosphate/benzoyl peroxide gel formulation and a matching clindamycin gel with respect to microbiologic activity and clinical efficacy in the topical treatment of acne vulgaris. Clindamycin is not suitable for everyone, however, and it can cause a range of serious side effects. This article looks at some uses, dosages, and symptoms of clindamycin. Clindamycin belongs to a class of antibiotics known as lincosamides, and is used to treat bacterial infections including septicemia, pelvic inflammatory disease, abdominal, gynecological, respiratory tract, bone and joint, and skin and skin structure infections. Topical clindamycin will not cure your acne. However, to help keep your acne under control, keep using this medicine for the full time of treatment, even if your symptoms begin to clear up after a few days. Clindamycin (Cleocin, Cleocin T, Evoclin) is a moderately priced antibiotic used to treat certain kinds of bacterial infections. It is also used on the skin to stop the growth of certain bacteria that cause acne. Discover clindamycin phosphate, a versatile medication for bacterial infections. Learn its uses, how it works, side effects, and key precautions for safe treatment. Clindamycin is used to treat certain types of bacterial infections. Clindamycin is in a class of medications called lincomycin antibiotics. It works by slowing or stopping the growth of bacteria. Antibiotics such as clindamycin will not work for colds, flu, or other viral infections. What is clindamycin phosphate? Clindamycin phosphate is a salt of clindamycin that is usually used for injectable or topical formulations of clindamycin. Clindamycin phosphate is a prodrug of clindamycin that is rapidly converted to active clindamycin once inside the body or applied to the skin.