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, Trulicity, 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 and 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.

← All providers and medications

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

Bottom line

4 molecules act on the GLP-1 receptor and they are sold under 11 names here. 4 of the weight-loss drugs on this site are not GLP-1s at all — Phentermine, Trulicity, Contrave, Qsymia — which is the confusion worth clearing before comparing anything. And there is no GLP-3.

Last updated 2026-06-10 — each product's price and approval status

What are the names of the GLP-1 drugs?

Four molecules, sold under 11 names. semaglutide is sold as Compounded semaglutide and Ozempic and Rybelsus and Wegovy pill and Wegovy; tirzepatide is sold as Compounded tirzepatide and Mounjaro and Zepbound; orforglipron is sold as Foundayo; liraglutide is sold as Saxenda and Victoza. 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, Trulicity, 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	$199
Ozempic	Novo Nordisk	injection	FDA approved for type 2 diabetes	$199
Rybelsus	Novo Nordisk	pill	FDA approved for type 2 diabetes	—
Wegovy pill	Novo Nordisk	pill	FDA approved for chronic weight management	—
Wegovy	Novo Nordisk	injection	FDA approved for chronic weight management and cardiovascular risk reduction	$349

Compounded semaglutide and Ozempic and Rybelsus and Wegovy pill and Wegovy are the same molecule. What differs is the approved indication, the dose ceiling and the price — a gap of $150 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	$200
Mounjaro	Eli Lilly	injection	FDA approved for type 2 diabetes	$499
Zepbound	Eli Lilly	injection	FDA approved for chronic weight management and obstructive sleep apnea	$449

Compounded tirzepatide and Mounjaro and Zepbound are the same molecule. What differs is the approved indication, the dose ceiling and the price — a gap of $299 a month for the same substance.

3. orforglipron— the first as a daily pill

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	$415
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 only one of them publishes a verified price here.

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	—
Trulicity	dulaglutide	injection	—
Contrave	naltrexone + bupropion	pill	$99
Qsymia	phentermine + topiramate	pill	$98

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-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. Whether that difference is what produces the higher trial figure is not something the trials were designed to answer, because they were never run head to head.

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 and Ozempic and Rybelsus and Wegovy pill and Wegovy; tirzepatide, sold as Compounded tirzepatide and Mounjaro and Zepbound; orforglipron, sold as Foundayo; liraglutide, sold as Saxenda and Victoza. 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, Trulicity, 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 and 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 labelling; prices are read from the seller's own published page on the date shown. Information only, not medical advice.