This is the question underneath all the others. Here is my answer, and then the reasoning.

Yes — when it is the real medication, at the right dose, with a provider watching. Every clause in that sentence is doing work.

FDA approval means something specific

The brand-name medications approved for weight management are Wegovy (semaglutide) and Zepbound (tirzepatide). Ozempic and Mounjaro are the same molecules approved for type 2 diabetes.

Approval is not a marketing badge. I have had patients question whether FDA approval can be trusted at all. I laughed — not at them, but because so few people ever see the scientific rigor involved, or the caliber of the minds reviewing that data. Mistakes can always happen. But approval means someone has done a thorough weighing of effectiveness, safety, and benefit before that medication reached you.

In practice: facilities are inspected, every pen contains what the label says at the strength it says, and the medication was studied in tens of thousands of patients over years. Side effects keep being collected afterward — that surveillance is how the eye-related labeling change in Chapter 4 came about. A system that updates its warnings is working.

Compounded versions are a different thing

Compounded semaglutide and tirzepatide are not FDA-approved.

Pharmacy compounding is a legitimate, regulated part of medicine. But the FDA does not review compounded products for safety, effectiveness, or manufacturing quality the way it reviews an approved drug. Nobody has verified that a given vial contains what it claims, at the strength it claims.

That is not a technicality. The FDA has documented dosing errors with compounded GLP-1s — including patients who drew up many times their intended dose because the product came as a vial and syringe rather than a pre-set pen. It has also warned about products using salt forms of semaglutide that are not the same active ingredient as the approved medication.

Here I want to be straightforward about where I part company with the standard references.

The mainstream position is to advise against compounded GLP-1s altogether — no regulatory review for safety, quality, or effectiveness, and safety problems reported. That position is defensible, and you deserve to know it is the majority view among physicians.

My position is narrower. The quality of a compounded medication depends enormously on the pharmacy behind it, and those pharmacies are not interchangeable. I work only with a state-licensed Section 503A pharmacy that fills patient-specific prescriptions and can document its potency, sterility, and ingredient-sourcing standards. A prescription filled at a pharmacy meeting that bar, under a licensed provider monitoring you, is a materially different proposition from what most people mean when they say "compounded."

What I will not defend is that other thing. "Cheap semaglutide" from a website with no physician involved is a fundamentally different risk category — even though the words on the label may look similar.

I understand why people go looking. These medications are expensive, coverage is inconsistent, and the gap between what patients need and what they can afford is real. The answer is transparency about what you are getting, not pretending the difference does not exist.

What supervision actually buys you

I have had patients come to me with very different stories. Some bought from scam websites and never received anything. Others were sold poor-quality medication by pharmacies and providers nobody was vetting. And I recently saw a patient getting no results who had been pushed well past the maximum approved dose before she felt any appetite suppression whatsoever — which tells you a great deal about what she was being given, and about who was supervising her.

The medication is only part of the treatment. The rest is someone checking whether it is working, whether you are losing the right kind of weight, whether your labs are holding steady, and whether a symptom you dismissed is one of the rare ones that matters.

Taking a prescription medication without that is like flying a plane without a pilot. You might well take off. There is no one aboard who knows how to land.