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What is Mounjaro?
About this page. Written by the GLPInfo editorial team with AI assistance from the official sources listed at the end, and approved by the site owner before publication. It has not been reviewed by a named clinician. Published 7 Sep 2026 · next scheduled review 7 Dec 2026.
This page is information, not medical advice. It never tells you which medicine or dose is right for you: those decisions sit with you and a licensed prescriber. Report suspected side effects to FDA MedWatch. Spotted an error? Tell us.
Mounjaro is tirzepatide under its type 2 diabetes brand, FDA-approved in May 2022. It is the same molecule as Zepbound, which carries the weight-management indication. GLPInfo lists Mounjaro's price as a fact because people ask; whether it is appropriate for anyone is a prescriber's decision.
How it works
Tirzepatide activates both the GIP and GLP-1 receptors, improving blood-sugar control and reducing appetite. Mounjaro is a once-weekly single-dose pen.
Doses
2.5mg for the first four weeks, then 5mg, with increases in 2.5mg steps at intervals of at least four weeks up to 15mg as the prescriber judges.
Mounjaro and weight loss
Weight loss is an effect of tirzepatide seen in its diabetes trials (SURPASS) and studied for its own sake in SURMOUNT, but Mounjaro's FDA-approved indication is type 2 diabetes. Prescribing Mounjaro for weight management is off-label, which is a lawful clinical decision for a prescriber and not something a comparison site advises on. Zepbound is the weight-management brand and is cheaper to self-pay.
Side effects and safety
As for Zepbound: predominantly gastrointestinal, with a boxed warning about thyroid C-cell tumours seen in rodents, and pancreatitis, gallbladder disease and hypoglycaemia among the serious risks. Report suspected side effects to FDA MedWatch.
What it costs today
First-month all-in prices for Mounjaro at the 2.5mg starting dose currently start from $499 at LillyDirect across the channels we compare, read 6 Sep 2026. Compare all Mounjaro channels or see the 12-month true cost.
Frequently asked questions
How much does Mounjaro cost without insurance?
$499 at every dose through LillyDirect; some telehealth channels list far higher prices for the pen. Live comparison. Zepbound, the same molecule, self-pays from $299.
Is Mounjaro the same as Zepbound?
Yes, the same tirzepatide, different brand and indication. Zepbound is FDA-approved for weight management; Mounjaro for type 2 diabetes.