home.intekom.com/pharm/hexal/acc200.html - that's the link for the package insert. All it basically says is that safety in pregnancy has not been established. Usually that is purely because no one will do trials on pregnant women. May doctors prescribe meds that say the same thing but that are totally fine to use.
I reckon that since it's safe to give to babies it is probably safe in pregnancy, but I don't have any scientific info to back that up.
Here's another link where a lady queries an online dr and the dr says it hasn't been known to have harmful side effects:
www.health24.com/Experts/Question/acc200-20061130