Clindamycin
"I was given this drug after a root canal and temp crown placement.  I wasn't having any symptoms of infection (pain/fever) prior to procedure, so it seemed a little strange to be given this after, but figured dentist knew what she was doing.  300mg every 6hrs (4 X / day) for 2 weeks. stomach pain/diarrhea started after 24hrs. I called the dentist asking for something else and was told I didn't have to take it anymore if it was causing me issues.  ??? WHAT-why was I even given this extreme antibiotic to begin with?  was on this med for 3 days and 24hr after i'm still having bad digestive issues. feel like it has caused an issue where there wasn't one originally.  I will never take this ever again, just hope the damage isn't permanant"