Cipro (ciprofloxacin) and the other quinolone antibiotics (ofloxacin
, etc) are contraindicated in pregnancy for
theoretical reasons because of their effects on ADOLESCENT dogs' cartilage (i.e., joint problems). There has never been an adverse effect on HUMANS like this, to my knowledge, and no problems in pregnancy that I am aware of. We still advise against their use in pregnancy, but only for theoretical reasons.