What is Semaglutide?
Semaglutide is a GLP-1 receptor agonist — a lab-made version of a hormone your gut releases after eating. Novo Nordisk sells it under three brand names: Ozempic (weekly injection for type 2 diabetes), Wegovy (higher-dose weekly injection for weight management), and Rybelsus (a daily oral tablet for diabetes).
It was first approved by the FDA in 2017 for type 2 diabetes. In 2021, the higher 2.4 mg dose was approved as Wegovy for chronic weight management, and it quickly became one of the most prescribed weight loss medications in the United States.
Semaglutide works best alongside diet and exercise changes, and it requires a prescription from a licensed provider — either in person or through telehealth.
How it works
GLP-1 (glucagon-like peptide-1) is released by your intestines when you eat. It tells your pancreas to release insulin, slows how quickly food leaves your stomach, and signals your brain that you are full. Semaglutide mimics this hormone but resists breakdown, so one injection keeps working for a full week.
The practical effect: you feel full sooner, stay full longer, and food noise — the constant background pull toward eating — quiets down for most people. Blood sugar control improves at the same time, which is why the same molecule treats both diabetes and obesity.
Dosing schedule
Semaglutide is titrated — you start low and step up every 4 weeks so your body can adjust. The Wegovy weight-management schedule:
| Dose | When |
|---|---|
| 0.25 mg / week | Weeks 1–4 — starter dose, not therapeutic |
| 0.5 mg / week | Weeks 5–8 |
| 1.0 mg / week | Weeks 9–12 |
| 1.7 mg / week | Weeks 13–16 |
| 2.4 mg / week | Week 17+ — full maintenance dose |
Results in clinical trials
In the STEP 1 trial (Wilding et al., NEJM 2021), adults taking weekly 2.4 mg semaglutide lost an average of 14.9% of their body weight over 68 weeks, versus 2.4% on placebo. About one in three participants lost 20% or more. Results in diabetes-dose trials (Ozempic, up to 2 mg) are lower — roughly 4–6%.
Side effects
Common
- Nausea (most common, usually fades)
- Vomiting
- Diarrhea
- Constipation
- Stomach pain
- Fatigue
- Headache
Serious (rare)
- Pancreatitis
- Gallbladder problems (gallstones)
- Kidney injury from dehydration
- Hypoglycemia (when combined with insulin or sulfonylureas)
How much does Semaglutide cost?
What you pay depends entirely on the route: branded with insurance, branded cash-pay, or compounded (when legally available).
| Route | Typical cost |
|---|---|
| Wegovy (list price) | $900–$1,400 / month |
| Wegovy (NovoCare cash-pay) | ~$499 / month |
| Ozempic (list price) | ~$950–$1,000 / month |
| Compounded semaglutide (when legal) | $150–$400 / month |
| With insurance coverage | $0–$100 / month copay (plan-dependent) |
Prices vary by clinic, dose, and location — always confirm directly. See real local pricing on our clinic listings.
Frequently asked questions
Is semaglutide the same as Ozempic?
Ozempic is one brand of semaglutide, approved for type 2 diabetes at doses up to 2 mg weekly. Wegovy is the same molecule approved for weight management at up to 2.4 mg weekly. Rybelsus is the oral tablet form for diabetes. Same active ingredient — different doses, delivery, and FDA approvals.
How fast does semaglutide work for weight loss?
Most people notice reduced appetite within the first 1–2 weeks, but meaningful weight loss builds over months as the dose titrates up. In STEP 1, weight loss continued through roughly week 60 before plateauing. Expect the full effect to take 4–6 months at the maintenance dose.
Do you regain weight after stopping semaglutide?
Usually some, yes. In the STEP 1 extension study, participants regained about two-thirds of lost weight within a year of stopping. Most providers treat it like a chronic-condition medication — the plan for maintenance (staying on, tapering, or transitioning to lifestyle-only) should be part of your first conversation.
Can I get semaglutide without a prescription?
No. Semaglutide is prescription-only in the US, whether branded or compounded. Anything sold without a prescription — online "research" vials, unregulated imports — is illegal and unsafe: unverified purity, dosing, and sterility. A legitimate provider consult is the only safe route.
Is compounded semaglutide still available?
The FDA declared the semaglutide shortage resolved in 2025 and moved to enforcement against most compounding. Some clinics still offer it under narrow exemptions, but availability is shrinking and the legal picture keeps shifting. Ask the clinic directly what they dispense and where it is sourced.
Related medications
This page is for educational purposes only and is not medical advice. Semaglutide is a prescription medication — talk to a licensed healthcare provider about whether it is right for you. GLPFinders is a directory service and does not prescribe, sell, or dispense medications.