How to evaluate a peptide pharmacy
Published 2026-07-11 · No medical advice · Not sponsored by any clinic or pharmacy
What to look for, what to ignore, and which public sources actually answer the question.
Every compounded GLP-1 prescription passes through a pharmacy before it reaches you, and the clinic you signed up with is almost never the pharmacy doing the compounding. That handoff is where most of the real risk in this category lives, and it's the part clinics talk about least. Here's what to actually check, in order of how much it matters.
1. Is it a 503A or a 503B?
These are two different FDA regulatory categories with different oversight models. A 503A pharmacy compounds against an individual, patient-specific prescription; a 503B outsourcing facility compounds in larger batches under closer-to-manufacturing FDA oversight, including routine inspections. Neither is automatically better; each has a different job. What matters is that the pharmacy discloses which one it is and that the category matches how it's actually operating. See our full 503A vs 503B explainer for the difference in plain terms.
2. Is it licensed in your state?
A pharmacy can hold a clean sterile-compounding license in its home state and still be legally unauthorized to ship into yours. Pharmacy licensing is state-by-state, and most compounding pharmacies do not publish a full state-by-state license list on their marketing site. You can check directly: every state has a board of pharmacy with a public license lookup. Search "[your state] board of pharmacy license search" and look up the pharmacy by name, not just the clinic. If the clinic won't tell you which pharmacy fills your prescription before you pay, that alone is worth pausing on.
3. Accreditation: PCAB, or USP <795>/<797>/<800>
PCAB (Pharmacy Compounding Accreditation Board) accreditation is a voluntary, third-party audit of a compounding pharmacy's practices against national standards. It is not required to operate, which is exactly why it's a useful signal: a pharmacy that sought it out is telling you something about how it wants to be evaluated. Absent PCAB, look for the pharmacy explicitly stating compliance with USP <795> (non-sterile compounding), <797> (sterile compounding — this is the relevant one for injectables), and <800> (handling hazardous drugs). These are published national standards a serious pharmacy will name specifically, not gesture at with words like "pharmaceutical-grade" or "FDA-registered facility" (registration is not the same thing as accreditation or inspection).
4. FDA inspection history and warning letters
The FDA publishes warning letters and, on request, Form 483 inspectional observations. A pharmacy having a 483 in its history is not automatically disqualifying, compounding is a hands-on process and observations happen; what matters is whether findings were resolved and whether there's a pattern. A warning letter (a step up from a 483, issued when the FDA determines violations are serious enough to warrant formal notice) within the last two years, especially one involving sterility or the specific medication you're being prescribed, is a hard stop. You can search the FDA's public warning letter database directly by company name.
5. Recalls
An active or recent recall of the specific product line you'd be prescribed is disqualifying on its own. Recalls are searchable on FDA.gov and are usually covered by trade press when they involve a well-known compounder.
6. API sourcing
Ask, in writing, where the active pharmaceutical ingredient (the actual tirzepatide or semaglutide, not the finished product) comes from. A legitimate compounder can name its supplier and confirm the supplier is FDA-registered, and will provide a Certificate of Analysis on request. "Pharmaceutical-grade API from a trusted partner" with no supplier named is marketing language, not an answer.
None of this requires special expertise, only asking the question and checking a public database. The clinics that discourage you from asking, by not naming a pharmacy, by being vague about accreditation, or by treating the question as rude, are telling you something.