“Clindamycin Phosphate USP eqv” typically indicates that the medication contains clindamycin phosphate as the active ingredient, and the quantity provided is equivalent to a certain amount of clindamycin base, as per the United States Pharmacopeia (USP) standards.

Clindamycin is an antibiotic medication used to treat various bacterial infections. Clindamycin phosphate is a water-soluble derivative of clindamycin commonly used in topical formulations, such as lotions, gels, and creams, for the treatment of acne vulgaris and other skin infections.