What compounded actually means
Compounded is not generic, not counterfeit, and not FDA approved. Here is what the word actually describes, and the questions worth asking a provider.
Key takeaways
- Compounded means prepared for a patient by a licensed pharmacy rather than manufactured as an FDA-approved finished product.
- It is not a generic, it is not counterfeit, and it has not been reviewed by the FDA for safety, effectiveness or manufacturing quality. All three are true together.
- 503A pharmacies compound for an individual patient against a prescription. 503B outsourcing facilities register with the FDA and follow stricter manufacturing standards.
- Compounding a copy of an approved drug is only permitted in limited circumstances, and those circumstances have changed as shortages were declared resolved.
- Salt forms such as semaglutide sodium are not the same active ingredient as the approved drug, and the FDA has said so.
A compounded medication is prepared for a patient by a licensed pharmacy rather than manufactured and approved as a finished drug product. That is the whole definition, and almost every misunderstanding comes from filling the gap with something else.
It is not a generic, because a generic is an approved copy of an approved drug. It is not counterfeit, because it is made by a licensed pharmacy under state and federal oversight. And it has not been reviewed by the FDA for safety, effectiveness, or manufacturing quality, because compounded preparations are not approved products.
All three of those things are true at once. Anyone who tells you only the flattering one is selling.
The actual definition
A compounded drug is prepared by a pharmacist for a patient, usually because an approved product does not fit that patient in its available form or strength. Compounding is legal, long-standing, and regulated under sections 503A and 503B of the Federal Food, Drug, and Cosmetic Act.
What it is not is approved. The FDA does not review compounded preparations for safety, for effectiveness, or for manufacturing quality before they reach a patient. That is the single most important sentence on this page, and it is the one most peptide sites leave out.
It is also not counterfeit or gray market. A licensed compounding pharmacy is inspected, licensed by its state board, and accountable for what leaves the door. That is a meaningfully different thing from a website selling a vial labeled not for human consumption.
503A and 503B, and why it matters to you
A 503A pharmacy compounds against a prescription for a specific, identified patient. A 503B outsourcing facility registers with the FDA, can produce larger batches without a patient-specific prescription, and is held to current good manufacturing practice requirements and FDA inspection.
Neither is automatically better for you, but they answer different questions. 503B brings more manufacturing oversight. 503A allows a preparation genuinely tailored to one person. A prescription arranged through the provider network is filled by a pharmacy working with that network, and you are entitled to ask which one filled yours.
The copies question, honestly
Compounding something that is essentially a copy of an available approved drug is restricted. The main openings are a genuine drug shortage, or a clinical difference that matters for an individual patient, such as a dose or formulation the approved product does not offer.
That is why compounded semaglutide and tirzepatide became widely available in the first place: both were on the FDA drug shortage list. The FDA later declared the tirzepatide shortage resolved in late 2024 and the semaglutide shortage resolved in early 2025, with wind-down dates during 2025 for compounding based on shortage alone.
The rules in this area keep moving, and any page claiming to state today's legal position permanently is overreaching. What matters practically is that your prescription comes from a licensed provider who is responsible for that judgment, and is filled by a licensed pharmacy operating under the rules as they currently stand. If a seller cannot tell you which pharmacy filled it, that is your answer.
What to ask before you buy anything compounded
These questions are quick, and the ones that get a vague answer tell you the most.
- Which pharmacy fills it, and is it a 503A or a 503B?
- Is there a real prescription from a licensed provider who reviewed my history, or a form nobody read?
- Exactly what is in the vial, including the form of the active ingredient? Salt forms such as semaglutide sodium are not the same active ingredient as approved semaglutide, and the FDA has flagged them.
- What else is in it? Combination vials with vitamins or amino acids added are a formulation choice with its own risk profile, not a bonus feature.
- Is it tested for sterility and potency, and will you show me?
- Who do I call when something goes wrong, and is there a provider on the other end?
How Baseline handles it
Baseline is a wellness consulting practice. It does not prescribe. Intake is reviewed independently by a licensed provider network, that network makes the prescribing decision, and fulfillment happens through a licensed compounded 503A or 503B pharmacy working with them.
The reason to say that plainly is that the structure is the safety feature. A compounded preparation with a real prescriber, a real pharmacy and scheduled check-ins is a different product from the same molecule bought from a website, even though the label reads the same.
What this means for you
Compounded is a legitimate category with a real caveat: it is not FDA approved or FDA reviewed for quality. Judge the provider and the pharmacy behind it, and ask what is in the vial.
Therapies discussed here
References
- Federal Food, Drug, and Cosmetic Act, sections 503A and 503B
- FDA, compounding and the FDA: questions and answers
- FDA, medications containing semaglutide marketed for type 2 diabetes or weight loss, including notes on salt forms
- FDA drug shortages database, semaglutide and tirzepatide status updates, 2024 to 2025