The GLP-1 Medication Side Effect Nobody Warned You About

By Dr. Teresa Alasio, MD — Founder, Intentional Self Aesthetics

Patients ask me about GLP-1 injections almost every week now. And I think that’s a good thing — this class of medication has genuinely changed what’s possible for people who’ve struggled with weight for years. The results are real.

But there’s a conversation I keep having that I wish I’d had with more patients before they started their medication. It’s about a side effect that doesn’t show up in the standard list — and that most weight loss programs don’t think about at all.

The side effects everyone knows about

Nausea, fatigue, and GI discomfort are the most commonly discussed GLP-1 medication side effects. They’re real, they’re manageable for most patients, and they tend to improve after the first few weeks of titration. Any good GLP-1 provider should be walking you through these and monitoring your response.

The one they don’t mention

Here’s what I see in my practice that the brochure doesn’t cover: what rapid weight loss does to your face and your muscle.

When you lose a significant amount of weight quickly, you don’t just lose fat — you often lose muscle mass, too. And in the face, volume loss can show up as hollowed cheeks, looser skin around the jaw, and an overall appearance that reads as older rather than lighter. Patients and physicians have started calling this “Ozempic face,” though the issue isn’t specific to Ozempic — it can happen with any GLP-1 medication when weight loss is rapid and unsupervised.

I’m not saying this to scare anyone away from GLP-1 medication. I prescribe it. It works. But the outcome you want — looking and feeling better, not just lighter — requires thinking about more than the scale.

Why it happens

Fat in the face isn’t just cosmetically useful — it provides structural support. When it goes quickly, the skin doesn’t always follow at the same pace. The result can be sagging or deflation that looks different from normal aging but happens faster.

Muscle loss is a separate issue that affects both your body composition and your metabolism. Losing muscle while losing fat means you’re losing the tissue that burns the most calories at rest — which can make long-term weight maintenance harder and your body look softer than you expected.

What you can actually do about it

This is where physician supervision matters beyond just writing the prescription.

For muscle preservation: Emsculpt NEO uses high-intensity electromagnetic energy to stimulate muscle contractions at a level you simply can’t achieve through exercise. For patients on GLP-1 medication, it’s one of the most effective tools we have for building and maintaining muscle mass during active weight loss.

For the face: The goal is to stay ahead of volume loss, not catch up to it. Depending on where you are in your weight loss journey, we might look at biostimulators that encourage your skin’s own collagen production, RF microneedling to improve skin tightening, or targeted filler to restore structure — all part of a plan, not a reaction to a problem that’s already happened.

None of this requires a separate set of providers, separate visits to separate offices, or coordinating between people who don’t know each other. That’s the advantage of a physician-led practice that offers both medical weight loss supervision and aesthetic care under the same roof.

What to ask your GLP-1 provider

If you’re considering a GLP-1 medication or are already on one, here are three questions worth asking:

• How will you monitor my muscle mass, not just my weight?
• What’s your plan if I start noticing facial volume changes?
• Are you prescribing FDA-approved branded medications, or compounded formulations?

The answers tell you a lot about whether your provider is thinking about your whole outcome — or just the number on the scale.

How we approach it at Intentional Self Aesthetics

Our Medical Weight Loss Program was built around this exact problem. We prescribe only FDA-approved branded GLP-1 medications, and we supervise every patient’s care personally — not through a protocol or an algorithm. For patients who want it, muscle preservation using Emsculpt NEO and aesthetic restoration are built into the program from the start.

We’re currently accepting a limited number of founding patients for virtual visits across Connecticut and New York.

Learn more about the program and apply for a founding spot →

Dr. Teresa Alasio is a board-certified physician (Pathology, Cytopathology) and the founder of Intentional Self Aesthetics in New Canaan, CT. She writes a regular health column in the New Canaan Sentinel.