bacterial infection
"Have been on clindamycin 7+ days (300 mg morning & night) & am doing just fine. Have another week to go.  Did not know about drinking lots of water, taking with food or sitting up afterwards. Just got bad dry mouth. Was prescribed this because I am allergic to penicillin.  Told if I didn't finish it all, I was in danger of sepsis. Bad tooth/jaw infection with killer pain. Felt better in 24 hours. Worked great for me. (Sorry for those of you who had terrible reactions. Hope you have gone back to your doctor since C-diff is a real possibility. I had ulcers and gastritis before and shudder when you mention the pain.)"