What antianxiety medication can you take while pregnant?

Ask obstetrician. All anti-anxiety drugs are level c teratogens which means they have potential for birth defects. I would check with your obstetrician about which medicine would be best during pregnancy. If you have to take anti anxiety medicine, it is best to start in third trimester of pregnancy.
Good question. Since all the anti-anxiety medications i know of have some potential risks, they all need to be assessed individually with consideration of the medication and the particular problem. This truly requires specific advice from a medical provider.