It is an antibiotic used to treat infections. It can be used on a host of infections which can be respiratory or GI infections or any where else in the body. It is usually given in serious infections as it has a narrow safety margin and involves a lot of caution while taking it. You can learn more about it here. http://www.drugs.com/clindamycin.html
You are welcome to ask if you have any further questions regarding it. Hope it was useful.
