bacterial infection
"Effective for treating bacterial tooth/gum infection, but the side effects were significant.  Ulcer-like stomach pain, gas & intestinal cramping were the most worrying.  I also felt weepy and depressed for no reason while taking clindamycin (which has happened to me on other antibiotics like Cipro).  I also noticed achy bone and joint pains intermittently.  I just felt generally unwell while taking this medication.  



Use caution if you're in a hospital setting or take a proton pump inhibitor, as clindamycin is the antibiotic most likely to cause C. diff infection."