Semaglutide is a GLP-1 receptor agonist — the same active molecule sold under three brands: Ozempic (diabetes injection), Wegovy (weight-loss injection, now also a pill), and Rybelsus (oral diabetes tablet). It curbs appetite, slows digestion, and improves blood-sugar control. It’s prescription-only, and compounded versions are not FDA-approved.
What is semaglutide?
Semaglutide is a synthetic peptide that imitates GLP-1 (glucagon-like peptide-1), a hormone your gut releases after eating. By activating the GLP-1 receptor for days at a time, it lowers appetite, slows gastric emptying, and prompts glucose-dependent insulin release — which is why it supports both blood-sugar control and weight loss. For the full mechanism, see how semaglutide works. Rapid weight loss on semaglutide can also thin facial fat — see Ozempic face.
Which brands contain semaglutide?
Semaglutide isn’t sold under its own name as a brand — it’s the ingredient inside three FDA-approved products, each with a different approved use, dose, and format:
Brand semaglutide (Ozempic, Wegovy, Rybelsus) is an FDA-approved finished product. Compounded semaglutide uses the same active molecule but is prepared by compounding pharmacies and is not FDA-approved — the FDA doesn’t review it for safety, effectiveness, or manufacturing quality. It’s often cheaper, but understand that trade-off first.
Semaglutide vs. tirzepatide
The other big GLP-1 ingredient is tirzepatide (Mounjaro and Zepbound), a dual GIP/GLP-1 agonist that tends to produce more weight loss in trials. See the full semaglutide vs. tirzepatide comparison.
What does semaglutide cost?
Price depends on the brand, your insurance, and whether you use a manufacturer savings card, cash-pay telehealth, or (unapproved) compounded routes. See the full price landscape by route on our semaglutide cost page, or the route-by-route ranking on the cheapest semaglutide guide.
Semaglutide dosage & titration
Semaglutide is dosed differently across its three products — Wegovy up to 2.4 mg weekly, Ozempic up to 2 mg weekly, and Rybelsus up to 14 mg daily. See all three schedules side by side on the semaglutide dosage chart, with what each step means, the maximum dose, and missed-dose rules.
One molecule, 3 brands — and why that decides your bill
Semaglutide is sold under 3 US brand names. They are the same active drug, but they are different products with different approved uses — and insurers price the product, not the molecule. That single fact explains most of the confusion in this category.
Ozempic — type 2 diabetes, plus cardiovascular risk reduction in diabetes with established heart disease.
Wegovy — chronic weight management, plus cardiovascular risk reduction in adults with established heart disease and overweight or obesity.
Rybelsus — type 2 diabetes — the daily oral tablet.
The practical consequence: asking for the diabetes brand to treat weight is off-label and rarely covered, so it usually costs you the coverage route rather than saving money. The on-label product for your goal is the one plans actually pay for.
The second indication that can bypass an exclusion
Wegovy carries a cardiovascular-risk-reduction indication (SELECT trial). Because that is not a weight-loss use, it can unlock coverage where a plan excludes weight-loss drugs outright.
Many employer plans carve out weight-loss medication entirely, and Medicare Part D excludes drugs used for weight loss by statute. People in that position often conclude they have no route at all — and that conclusion can be wrong, because the request would be made on the other indication, documented as such. Whether it applies depends on your diagnosis, not on how the drug is marketed. See GLP-1 insurance coverage.
What the trial evidence actually shows
Semaglutide lost the only direct head-to-head against tirzepatide — −13.7% versus −20.2% mean weight change over 72 weeks (SURMOUNT-5, N=751, NEJM 2025). It beat dulaglutide in SUSTAIN-7.
Two caveats worth carrying. Trial doses were titrated to what each participant tolerated, so results reflect real-world use rather than top-dose-versus-top-dose. And “more on average” is a group result — plenty of people do excellently on the drug that came second. Cost, coverage and tolerance decide the individual choice more often than the ranking does.
Practical rules specific to semaglutide
These numbers belong to semaglutide and must not be transferred to tirzepatide.Applying one molecule's window to the other is a real and common error. Always follow the Instructions for Use for the product in your hand.
Missed a dose: take it within about 5 days, then resume your usual schedule. Past that, skip it and take the next on schedule — never double up.
Changing your dose day: leave at least 48 hours between doses. Moving your dose later is always safe because it only lengthens the gap; it is moving earlier that runs into the minimum.
In-use storage: An in-use Ozempic pen can be kept up to 56 days. Wegovy exists in more than one device format now, so check the pen you were actually dispensed rather than assuming.
Freezing: a pen that has frozen must not be used even if it thawed and looks normal — the damage is invisible. This one is class-wide.
The semaglutide labels do NOT carry the oral-contraceptive instruction that the tirzepatide labels do. This is one of the most commonly mis-generalised facts in the category — do not transfer it in either direction.
Compounded semaglutide: what changed
Compounded semaglutide is not FDA-approved as a finished product, and its strength and purity are not FDA-verified. FDA declared the semaglutide shortage resolved in February 2025, which narrowed commercial-scale compounding. Patient-specific compounding remains permitted in narrow circumstances, but large-scale production of copies of a commercially available approved drug is a different matter.
The cost comparison also inverts once you look past the headline. Insurance essentially never covers compounded drugs, so the cash price is the entire price permanently — no copay to fall back on, no appeal route if it rises, no manufacturer assistance behind it. An approved product that gets covered can drop to a copay, and a denial can be fought. Price the covered route before deciding on the advertised number.
What it costs without insurance
Wegovy runs about $349/month at maintenance ($199/mo for the first 2 fills, then $349), the oral pill from about $149, and Ozempic self-pay $199/mo for the first 2 fills, then $349 (0.25/0.5/1 mg) or $499 (2 mg) against a list of $969–$998/mo.
Two traps in this category. Manufacturer copay cards are barred on Medicare, Medicaid and TRICARE — commercial insurance only — which is the most common cause of a surprise bill at the counter. And introductory pricing covers starting doses and early fills, so multiplying it by twelve to budget a year produces a number that does not exist. Ask what you pay at the dose you are titrating toward.
How to get semaglutide online
Semaglutide is prescription-only. A licensed clinician — in person or via telehealth — decides whether it’s appropriate and which brand fits. The online path is an online visit, a prescription, and home delivery; a prescription is always required. Compare vetted providers below.
Independent, US-licensed providers that prescribe GLP-1 medications. We compare and link — we never sell medication.
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Semaglutide is a prescription medicine in the GLP-1 receptor agonist class — a peptide that mimics the natural GLP-1 gut hormone. It reduces appetite, slows how fast the stomach empties, and helps the body release insulin when blood sugar is high. It’s the active ingredient in Ozempic, Wegovy, and the Ozempic pill — the tablets that replaced the Rybelsus brand in the US on May 4, 2026. This is general information, not medical advice.
Is semaglutide the same as Ozempic?
Semaglutide is the active ingredient in Ozempic — so Ozempic is one brand of semaglutide, but not the only one. The same molecule is also sold as Wegovy (for weight loss) and as the Ozempic pill, a daily tablet for type 2 diabetes that replaced the Rybelsus brand in the US in May 2026. The brands differ in their approved use, dose, and whether they’re an injection or a pill.
What’s the difference between semaglutide and tirzepatide?
Semaglutide activates one receptor (GLP-1). Tirzepatide — the ingredient in Mounjaro and Zepbound — activates two (GIP and GLP-1), and in head-to-head trials produced more weight loss on average. Semaglutide comes as an injection or a pill; tirzepatide is injection-only. Which fits is a decision for your prescriber.
Is compounded semaglutide the same as brand semaglutide?
It’s the same active molecule, but compounded semaglutide is not an FDA-approved finished product — the FDA does not review compounded medicines for safety, effectiveness, or manufacturing quality the way it does brand products. It’s often cheaper, but that trade-off matters; read the risks before considering it.
Is there a semaglutide pill?
Yes. Rybelsus has been an oral semaglutide tablet for type 2 diabetes since 2019, and a higher-dose oral semaglutide for weight loss (the Wegovy pill) launched in 2026. Oral semaglutide must be taken on an empty stomach with a small sip of water and a wait before eating; follow the specific product’s label.
How do I get semaglutide online?
Semaglutide is prescription-only in the US. The usual online route is a licensed telehealth provider: you complete an online visit, and if a brand (Ozempic, Wegovy, or Rybelsus) is appropriate the clinician prescribes it and a pharmacy ships it to you. A prescription is required — avoid any site selling semaglutide with no consultation. Compare providers and prices before you sign up; cost varies widely by brand, insurance, and pharmacy.