Schedule III, IV, and V are pretty much never rejected... mostly because they "don't have a high potential for abuse". It's schedule-II drugs that you have to watch out for... We're talking OxyContin/Percocet, Adderall, and codeine. Now those you may have issues with, but not always. Every pharmacy has a DEA license.

Virtually all anxiety meds (including Xanax, Ativan, Klonopin, and Valium) fall under schedule IV, which means anxiety meds in general should be an easy transfer... unless you're somehow taking something like Percocet for your anxiety -- in which case, I would say your pdoc should have his license revoked because Percocet is not for anxiety.

Personally, if I couldn't transfer my Rx for any reason, then I would just have my GP talk to my pdoc. GP can write the Rx for the summer.