First off, the VA wonu2019t call another pharmacy to transfer your prescription.Generally, they will require you to see a VA doctor to verify need and write a new u201cVAu201d script. It will have to be part of the u201cVA Formularyu201d or you will be given a u201csubstituteu201d that the VA has deemed to be just as effective (which is highly debatable and sometimes truly inadequate.) Donu2019t bother with off-label uses, the VA only uses them when it saves them money.They might send you to the Emergency Room (which doubles as the VAu2019s Urgent Care facility) or they might have a doctor or two standing by to handle these and similar things. It depends on the VAMC you visit.Your wait will be determined by the veterans ahead of you and their medical urgency and the staffing. You could feasibly get in and out in under 30 minutes if you want the Rx mailed to you (Some scripts HAVE to be mailed.) But you should plan on at LEAST 3 hours if you just u201cdrop-inu201d expecting it to be like a local pharmacy.A better option would be to schedule an appointment with a VA Primary Care for the day after your appointment with a non-VA doctor.Controlled substances are another matter. Basically anything Schedule II-IV. You would be lucky to have those in hand in less than 6 hours and I would say it is 50/50 you would get them at all the same day. So appointment & mail-order is the path I personally find preferable.An exception to (the exception of) controlled substances would be psychotropic drugs. The VAMCs I am aware of have walk-in Mental Health clinics. You still need to establish a medical history of needing the medication (subsequent visits would be easier.) So psychotropics are actually the easiest to obtain. Walk-in clinic (~an hour) then pharmacy (~an hour.)A few closing notes.Unless you are rated by the VA as 50% disabled or any VA disability rating for the condition being treated (or POWu2019s, Medal of Honor awardees, impoverished & a few others) you will pay a copay.If itu2019s your first time at the VA there is a ton of paperwork.If you get a prescription for the pharmacy they want to see your smiling face AT the pharmacy window before they will start processing your Rx. Otherwise they will try and mail it to you.Itu2019s probably easier to go to Wal-Mart and pay the $4.00.Other veterans that have used other VAMCs might have slightly different experiences. Hell, you canu2019t even go from say Texas to California and get your Texas medical records to display on your new doctors computer. Despite Obamau2019s grandstanding about digitizing VA records. The records are truly digitized and I can print them all from online but my medical team canu2019t see them or collate the data. (Sorry, TMIu2026)