@AddisonG, not sure what country you’re in, but different countries have different laws. I’m in the US, and here any doctor can prescribe any medication they want.
@Frozenblub, you already have the diagnoses, and you have a history of something that works. Telling your current doctor about what you know worked in the past is not something that will be looked at as drug seeking behavior. Doctors, for the most part, don’t have the kind of ignorant judgments that society as a whole has. They will understand your medical needs, and they will know that you have experience with past treatments and will want to know your experience in that area.