Acnesol Gel 1% is a topical (applied on the skin) antibiotic drug that fights bacterial growth on the skin. It has the active ingredient clindamycin phosphate, which is prescribed for the treatment of severe acne. The medicine helps heal pimples by reducing skin inflammation and swelling. Clindamycin effectively decreases the formation of blackheads and helps to renew skin cells faster. The topical antibiotic reduces the number of bacteria that cause acne. The anti-inflammatory of the active ingredient makes pimples less swollen and reduces the redness. The treatment may take 4 to 6 weeks after starting the medicine.