Clindamycin Phosphate Topical Solution USP 1% is a topical antibiotic medication prescribed for the treatment of acne vulgaris. It works by inhibiting the growth of Propionibacterium acnes, the bacteria responsible for acne development, while also reducing inflammation within the affected skin areas. Regular use helps decrease the formation of inflammatory lesions such as pimples and pustules. The solution is intended for external use only and should be applied as directed by a healthcare professional.