Clarithromycin also is used sometimes to treat other types of infections including Lyme disease (an infection that may develop after a person is bitten by a tick), cryptosporidiosis (an infection that causes diarrhea), cat ... www.nlm.nih.gov/medlineplus/druginfo/meds/a692005.html - Drugs and SupplementsClindamycin ... kill the viruses that cause colds, flu, and other infections. ... to treat acne