Talk to your Doctor and ask what the restrictions are. What I would recommend is that you call her/his office and tell them the name and city of the nearest pharmacy and have them send an "escript" to that pharmacy. If he requires a blood test then locate a close Lab such as Lab Corp. to have the blood work done.
If your Doctor does not want to help you out perhaps you need to find another doctor. You might also look at Costco Pharmacy options if you are close to one. You do not need to be a member to use the Cost Pharmacies