I was prescribed it on my second trimester two years ago. Pharmacist said I shouldn't take it, so I phoned my doc again and asked if i could really take it. He got mad to the pharmacist for making me scared. Then he said they probably have only manufacturer's data about medications in the pharmacy. He said manufacturers are always too cautious about their drugs, because want to avoid any possible law sues and that kind of things. Doc looked at some large database which was a collection of all the knowledge of medications during pregnancy and he said this antibiotics are marked safe there.