bone infection
"Had a raging toothache in a tooth that had a root canal several years prior.  Dentist thinks hidden canal may not have been cleared, but could also have been sinusitis, as the toothache coincided with bad head cold.  Anyway, I am allergic to most narcotic pain killers, so could only go with mega doses of ibuprofin to make tolerable and he prescribed clyndamycin for the infection, as I am also allergic to most penicillins.  300 mg 4x/day.  Started to feel pain relief after 7th-8th dose (i.e., 40 hours).  See lots of scary side effects here, but haven't had them yet myself.  Just take with meal and lost of water.  A little loose stool, but I'll take that over the tooth pain any day."