Clindamycin is a lincosamide antibiotic medication used for the treatment of a number of bacterial infections, including osteomyelitis (bone) or joint infections, pelvic inflammatory disease, strep throat, pneumonia, acute otitis media (middle ear infections), and endocarditis. 

It can also be used to treat acne, and some cases of methicillin-resistant Staphylococcus aureus (MRSA).