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Mounjaro vs Glucophage

Tirzepatide  ·  Metformin

A first-line oral tablet against a dual-incretin injection: two very different starting points for type-2 diabetes, with very different effects on weight.

Reviewed by the Priya Life Science Editorial Team, led by Sreepriya Prasannan
MSc Digital Transformation of Life Sciences (Innopharma Education / Griffith College); MSc & BSc Botany HSE Spark Ignite 2026 — Top 14 finalist
Compiled from official FDA data · Last verified · Editorial standards

At a glance

MounjaroTirzepatide
GlucophageMetformin
Brand names
Mounjaro / Zepbound
Glucophage
Drug class
GIP/GLP-1 receptor agonist
Biguanide
Route
Subcutaneous
Not listed
Marketed by
Eli Lilly
EMD Serono (Merck KGaA)
First FDA approval
13 May 2022
3 Mar 1995
US shortage
Not listed
Not listed

Key differences

What each one treats

MounjaroTirzepatide

MOUNJARO ® is indicated as an adjunct to diet and exercise to improve glycemic control in adults and pediatric patients 10 years of age and older with type 2 diabetes mellitus. MOUNJARO ® is a glucose-dependent insulinotropic polypeptide (GIP) receptor and glucagon-like peptide-1 (GLP-1) receptor agonist indicated as an adjunct to diet and exercise to improve glycemic control in adults and pediatric patients 10 years of age and older with type 2 diabetes mellitus. ( 1 )

GlucophageMetformin

The first-line oral medicine for type-2 diabetes.

How each one works

MounjaroGIP/GLP-1 receptor agonist

12.1 Mechanism of Action Tirzepatide is a GIP receptor and GLP-1 receptor agonist. It contains a C20 fatty diacid that enables albumin binding and prolongs the half-life. Tirzepatide selectively binds to and activates both the GIP and GLP-1 receptors, the targets for native GIP and GLP-1. Tirzepatide enhances first- and second-phase insulin secretion, and reduces glucagon levels, both in a glucose-dependent manner.

GlucophageBiguanide

The first-line oral medicine for type-2 diabetes.

Related comparisons

Ozempic VS Mounjaro Mounjaro VS Trulicity Mounjaro VS Victoza Mounjaro VS Byetta Ozempic VS Glucophage Jardiance VS Glucophage

Read more

Mounjaro profile Glucophage profile GLP-1 Agonists All comparisons
This is not a recommendation of one drug over the other.

Which medicine is right for a given person depends on their diagnosis, other conditions, other medicines, kidney and liver function, pregnancy, and cost or reimbursement — none of which this page knows. Two drugs in the same class are not automatically interchangeable. Never start, stop or switch a prescription medicine on the basis of a web page; that decision belongs to you and your clinician or pharmacist.

How this page is built

The facts on this page are pulled directly from official U.S. FDA datasets — they are not written from memory. Each field below names the dataset it came from, so you can check it yourself.

Plain-English summaries and drug-class explainers are written and reviewed by the Priya Life Science editorial team, led by Sreepriya Prasannan (MSc Digital Transformation of Life Sciences (Innopharma Education / Griffith College); MSc & BSc Botany). Data is retrieved automatically from the sources above and cross-checked with AI-assisted verification (Anthropic's Claude) — brand and generic names are matched against the exact FDA product record so that a combination product or a different formulation cannot be mistaken for the drug on this page. An editor reviews the result before publication. We describe this in full in our editorial standards and corrections policy. The FDA data on this page was last retrieved on 5 Aug 2026.

Please verify before you rely on this. This page is general information for life-science and pharmaceutical professionals. It is not medical advice, and it has not been reviewed by a clinician — our editorial team holds life-science qualifications, not clinical ones. It is not exhaustive and may not reflect the most recent label change. Always check the official prescribing information (US Prescribing Information or EU SmPC) and speak to your doctor or pharmacist before acting on anything here. Drugs in the same class are not automatically interchangeable, and approvals, brand names and indications differ between the US, the EU/Ireland (EMA/HPRA) and other regions. Spotted an error? Tell us — we correct promptly and log it.