Class B Topical Cream

trojas

I wrote a post yesterday about this. 

My derm prescribed me Azelex (its an acne cream that's fairly new). She said it was okay to use during pregnancy. When I pick it up at the pharmacy today, I ask the pharmacist about it and he says it relatively safe b/c it's a class B drug.

Would you use a class B drug during pregnancy? I need something for this hrrible acne, but I also don't want to take any chances.