I just had first root canal #14 through dental crown. Endodonist said there was pus -- infection. I have had allergic reaction to Levaquin and AzitheraI and have had side effects diarrhea and lightheaded from Cefdinir and Cephalexin so he prescribed Cipro 500mg. Said he doesn't usually prescribe but given that it have taken Cipro 250mg in the past (or urinary tract infection with no side effects. Is Cipro as effective as other antibiotics for dental infection?