My problem is i am prescibed 4 mg. a day, but im now pregnant. .. prescribe "benedry" because it has a "calming effect" has no idea how bad panic is. . Doctor prescribed Xanax 2 mg 3 times a medabc.us seems like a very. 2 of my 4 pregnancies I continued to take mg's of Xanax each day. My doctor told me there is a 10 percent chance that it can effect the. In fact the risks to a developing fetus are numerous. Xanax also has a high potential for abuse, and it is not an appropriate form of treatment for everyone.