Clindamycin is used to treat certain types of bacterial infections, including infections of the lungs, skin, blood, female reproductive organs, and internal organs. Clindamycin is in a class of medications called lincomycin antibiotics. It works by slowing or stopping the growth of bacteria. Clindamycin is used in the treatment of bacterial infections. It is used in infections of the skin such as acne (Pimples), abdomen, bone, skin, heart and soft tissues. It also used in post-operative infections.