Nothing. There is no GLP-3 — the name gets searched because people extend GLP-1 by analogy, the way GLP-2 exists. GLP-2 is a real hormone, and there is a drug for it, but it treats short bowel syndrome and has nothing to do with weight. If you are looking for something stronger than a GLP-1, what you have actually found is tirzepatide, which adds a second receptor rather than a higher number.

Is Zepbound the same as Mounjaro?

Same molecule, tirzepatide, from the same manufacturer, under two brand names with two approved indications: Zepbound for chronic weight management and obstructive sleep apnea, Mounjaro for type 2 diabetes. Moving between them is a prescribing and coverage decision rather than a change of medication.

Is Contrave or phentermine a GLP-1?

No, and this is the most consequential confusion in the category. Phentermine, Contrave, Qsymia are approved for weight but act by completely different mechanisms — none of them touches the GLP-1 receptor. They are priced differently, they carry different side effects, and comparing them to a GLP-1 on "which works better" compares two different kinds of thing.

Which GLP-1 comes as a pill?

Foundayo, Rybelsus and Wegovy pill. Everything else on this list is an injection. An oral GLP-1 is a genuinely different product rather than the same drug in another shape — absorption differs, and so does the price.

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Which drugs are GLP-1s, and which are not

Bottom line

Five molecules act on the GLP-1 receptor and they are sold under 12 names here. 3 of the weight-loss drugs on this site are not GLP-1s at all — Phentermine, Contrave, Qsymia — which is the confusion worth clearing before comparing anything. And there is no GLP-3.

Last updated 2026-09-22 — each product's price and approval status. Read and dated by Alex Seot.

What are the names of the GLP-1 drugs?

Five molecules, sold under 12 names. Semaglutide is sold as Compounded semaglutide, Ozempic, Rybelsus, Wegovy pill and Wegovy. Tirzepatide is sold as Compounded tirzepatide, Mounjaro and Zepbound. Orforglipron is sold as Foundayo. Liraglutide is sold as Saxenda and Victoza. Dulaglutide is sold as Trulicity. Brands sharing a molecule are the same active substance under different approved indications and dose ceilings — Zepbound and Mounjaro are both tirzepatide from the same manufacturer, one approved for weight and sleep apnea, the other for type 2 diabetes. Tirzepatide is the odd one: it acts on the GIP receptor as well as GLP-1, which is why it is described as dual-agonist rather than as a stronger GLP-1. Separately, Phentermine, Contrave, Qsymia are approved for weight and are not GLP-1s at all — different mechanisms, different side effects, different prices, and comparing them to a GLP-1 on effectiveness compares two different kinds of thing. There is no GLP-3; the name is searched because people extend the series by analogy. GLP-2 exists as a hormone and has a drug, but it treats short bowel syndrome rather than weight.

Every GLP-1, by molecule

1. semaglutide

Brand	Maker	Form	Approved for	A month
Compounded semaglutide	503A/503B compounding pharmacies	injection	Not FDA approved	—
Ozempic	Novo Nordisk	injection	FDA approved for type 2 diabetes: glycemic control, cardiovascular risk reduction, and kidney outcomes	$349
Rybelsus	Novo Nordisk	pill	FDA approved for type 2 diabetes	—
Wegovy pill	Novo Nordisk	pill	FDA approved for cardiovascular risk reduction in adults with established cardiovascular disease and either obesity or overweight, and for chronic weight management in adults	$299
Wegovy	Novo Nordisk	injection	FDA approved for cardiovascular risk reduction, chronic weight management from age 12, and noncirrhotic MASH with moderate to advanced liver fibrosis at stages F2 to F3 — the last under accelerated approval, which the label says may be contingent on a confirmatory trial	$349

Compounded semaglutide, Ozempic, Rybelsus, Wegovy pill and Wegovy are the same molecule. What differs is the approved indication, the dose ceiling and the price — a gap of $50 a month for the same substance.

2. tirzepatide— also acts on GIP, which is why it is called a dual agonist

Brand	Maker	Form	Approved for	A month
Compounded tirzepatide	503A/503B compounding pharmacies	injection	Not FDA approved	—
Mounjaro	Eli Lilly	injection	FDA approved for type 2 diabetes: to improve glycemic control, and on the label revised August 2026 also to reduce the risk of cardiovascular death, heart attack and stroke in adults with type 2 diabetes at high risk of them	$499
Zepbound	Eli Lilly	injection	FDA approved for chronic weight management and obstructive sleep apnea	$449

Compounded tirzepatide, Mounjaro and Zepbound are the same molecule. What differs is the approved indication, the dose ceiling and the price — a gap of $50 a month for the same substance.

3. orforglipron— a daily pill taken with or without food, where the semaglutide tablets need an empty stomach

Brand	Maker	Form	Approved for	A month
Foundayo	Eli Lilly	pill	FDA approved for chronic weight management	$299

4. liraglutide

Brand	Maker	Form	Approved for	A month
Saxenda	Novo Nordisk	injection	FDA approved for chronic weight management	—
Victoza	Novo Nordisk	injection	FDA approved for type 2 diabetes and cardiovascular risk reduction	—

Saxenda and Victoza are the same molecule. What differs is the approved indication, the dose ceiling and the price — and neither publishes a verified price here.

5. dulaglutide

Brand	Maker	Form	Approved for	A month
Trulicity	Eli Lilly	injection	FDA approved for type 2 diabetes and cardiovascular risk reduction	$389

These are sold for weight loss and are not GLP-1s

Approved for weight, and often discussed alongside the drugs above, but none of them acts on the GLP-1 receptor. They are cheaper, they have different side effects, and a comparison on “which works better” is comparing different mechanisms.

Drug	What it actually is	Form	A month
Phentermine	phentermine	pill	—
Contrave	naltrexone + bupropion	pill	$99
Qsymia	phentermine + topiramate	pill	$75

GLP-2, GLP-3, and GIP

There is no GLP-3: The name gets searched because GLP-1 looks like the first of a series. It is not. If you are looking for something that acts on more than one receptor, that is tirzepatide — GLP-1 plus GIP — and the next one in trials adds a third rather than being called GLP-3. GLP-1 vs GLP-3, explained →
GLP-2 is real and unrelated: Glucagon-like peptide-2 is a genuine hormone with a genuine drug — teduglutide, for short bowel syndrome. It is not a weight-loss drug and no weight-loss product is built on it. Finding it while searching for a stronger GLP-1 is a dead end.
GIP is the second receptor in tirzepatide: Glucose-dependent insulinotropic polypeptide. Tirzepatide acts on it as well as on GLP-1, which is the pharmacological difference between tirzepatide and semaglutide.The two have been run head to head. SURMOUNT-5 found that weight fell 20.2% on tirzepatide against 13.7% on semaglutide over 72 weeks, in adults with obesity. SURPASS-2 found that tirzepatide lost 1.9 to 5.5 kg more than semaglutide 1 mg over 40 weeks, in type 2 diabetes. No trial isolates how much of that difference the GIP half accounts for.

What is a GLP-1? →Four things to know before the price →What each is approved to treat →Which is best, by what you want →What is not approved yet →Survodutide, not yet approved →Retatrutide, not yet approved →CagriSema, not yet approved →Every verified price, ranked →What the labels list →Everything on semaglutide →Everything on tirzepatide →

GLP-1 names, answered

What are the names of the GLP-1 drugs?: By molecule: semaglutide, sold as Compounded semaglutide, Ozempic, Rybelsus, Wegovy pill and Wegovy; tirzepatide, sold as Compounded tirzepatide, Mounjaro and Zepbound; orforglipron, sold as Foundayo; liraglutide, sold as Saxenda and Victoza; dulaglutide, sold as Trulicity. Brands that share a molecule are the same active substance under different approved indications and dose ceilings, not different drugs.
What is GLP-3?: Nothing. There is no GLP-3 — the name gets searched because people extend GLP-1 by analogy, the way GLP-2 exists. GLP-2 is a real hormone, and there is a drug for it, but it treats short bowel syndrome and has nothing to do with weight. If you are looking for something stronger than a GLP-1, what you have actually found is tirzepatide, which adds a second receptor rather than a higher number.
Is Zepbound the same as Mounjaro?: Same molecule, tirzepatide, from the same manufacturer, under two brand names with two approved indications: Zepbound for chronic weight management and obstructive sleep apnea, Mounjaro for type 2 diabetes. Moving between them is a prescribing and coverage decision rather than a change of medication.
Is Contrave or phentermine a GLP-1?: No, and this is the most consequential confusion in the category. Phentermine, Contrave, Qsymia are approved for weight but act by completely different mechanisms — none of them touches the GLP-1 receptor. They are priced differently, they carry different side effects, and comparing them to a GLP-1 on "which works better" compares two different kinds of thing.
Which GLP-1 comes as a pill?: Foundayo, Rybelsus and Wegovy pill. Everything else on this list is an injection. An oral GLP-1 is a genuinely different product rather than the same drug in another shape — absorption differs, and so does the price.

Approval status and indications are read from each product's FDA labeling; prices carry their source and the date each was read. Information only, not medical advice.

Where every approval and label on this page comes from

Which molecule is a GLP-1, and what each brand is approved for, are questions with a register behind them.

DailyMed, U.S. National Library of Medicine — The register every FDA label quoted on this site is read from, with the version history that dates each one.
Drugs@FDA: FDA-approved drugs — What is approved, for which indication, and when — the register behind every approval date here.