Clindamycin
"I have taken this medication about four times in my life. First two times because I was pregnant with a tooth abcess. Other two same story. First time it cleared the infection with little side effects as I already have IBS. Third time was terrible and I stopped taking it. This time I found it again and am on day 2. I'm nauseous, have horrid cramping and diarrhea, severe lightheadedness, migraines, chills, slight fever and the pain is still immense. Not worth the side effects."