Find a pharmacy that actually has it in stock.

503A pharmacies are state-licensed compounding pharmacies that prepare medications for individual patient prescriptions. 503B outsourcing facilities are FDA-registered, can compound at scale (including for office stock), and follow current Good Manufacturing Practice (cGMP) standards similar to drug manufacturers. 503Bs are subject to direct FDA inspection; 503As are regulated primarily at the state board level. Both can be legitimate sources — the practical differences are scale, oversight depth, and whether they ship to non-prescriber addresses.

It depends on FDA shortage status and the specific molecule. Tirzepatide was removed from the FDA shortage list in August 2024; semaglutide followed in February 2025. Once a drug is off the shortage list, federal compounding under sections 503A and 503B narrows substantially — patient-specific exemptions still exist, but bulk compounding for general patients is restricted. Active enforcement has tightened through 2025, so verify your pharmacy's current legal status and product source before refilling.

Three signals worth checking: (1) PCAB accreditation — the Pharmacy Compounding Accreditation Board is the recognized third-party standard for compounders; (2) state board of pharmacy license verified through the NABP (National Association of Boards of Pharmacy); (3) for 503B facilities, FDA registration listed on the FDA's 503B outsourcing facility list. Ask about beyond-use dating, sterility testing, and whether they batch-test each lot. Reputable compounders are direct about all three.

Manufacturer locator services are the most reliable sources for live retail stock. NovoCare (Novo Nordisk) tracks Wegovy, Ozempic, Saxenda, and Rybelsus availability. LillyDirect (Eli Lilly) covers Zepbound and Mounjaro and offers self-pay vials. Both let you filter by ZIP and call to confirm. Independent local pharmacies often track inventory more carefully than chains and are worth calling.

Pharmaceutical distribution is allocated by manufacturer to wholesalers to pharmacies. A pharmacy's stock depends on its wholesaler relationship, dispense volume, and order timing. Two pharmacies six blocks apart can have totally different stock states on the same day. The standard advice is to call several pharmacies before assuming a drug is unavailable in your area.

It can be a good option when local pharmacies don't have stock or your local market is overpriced. The trade-offs: shipping (3–7 business days), temperature-controlled packaging is required and adds cost, and resolving issues like batch problems is slower than walking back into a local pharmacy. Established 503B outsourcing facilities are generally lower-risk for mail-order than smaller 503A pharmacies that ship interstate.

(1) Do you currently stock [drug name + dose]? (2) When was that confirmed? (3) For compounded GLP-1: who is your active pharmaceutical ingredient supplier, and do you do batch potency testing? (4) What's the cash price for a one-month supply? (5) Do you accept my insurance? (6) Earliest pickup or shipping date? Five minutes on the phone often saves a wasted trip or a switch to a less suitable provider.