Acanya Gel is a topical drug that treats severe acne in adults and children over age twelve. It's a combination of 1.2 % clindamycin phosphate and 2.5% benzoyl peroxide -- Benzoyl peroxide has an antibacterial effect while Clindamycin is an antibiotic that inhibits bacteria from growing on the skin. Acanya is non-alcoholic and water-based, too. However, this medicine is not yet available in generic forms and requires a prescription. The best results are seen after twelve weeks of use.