--- title: "Tirzepatide: What It Is, Evidence and Legal Status (2026)" description: "Tirzepatide: FDA-approved GIP and GLP-1 drug for type 2 diabetes and weight. FDA-approved use. US status as of Oct 17, 2026: approved. No dosing, no…" canonical: https://plainlygraded.com/peptides/tirzepatide/ last_updated: 2026-10-17 breadcrumb: "Home > Compounds > Tirzepatide" publisher: Plainly Graded policy: "No dosing, no sourcing, no vendor links. Every claim cites a public source." --- > We collect and compare information from public, cited sources. We cannot guarantee that it is complete, current or correct. This is not medical advice. Only a doctor can prescribe, and a doctor should confirm anything you read here before you act on it. # Tirzepatide Also called "Mounjaro", "Zepbound", "tirz" - [FDA approved](https://plainlygraded.com/regulatory/#tirzepatide) - [WADA: not prohibited](https://plainlygraded.com/regulatory/#tirzepatide) STATUS AS OF 17 OCT 2026 FDA: approved as Mounjaro (type 2 diabetes) and Zepbound (chronic weight management) · WADA: gLP-1 agonists are not prohibited; WADA says the status is unchanged for 2027 · [tracker entry](https://plainlygraded.com/regulatory/#tirzepatide) **The short answer:** Tirzepatide is an FDA-approved drug from Eli Lilly that acts on two hormone receptors, GIP and GLP-1. As of October 17, 2026 it is sold as Mounjaro for type 2 diabetes and as Zepbound for chronic weight management, and GLP-1 drugs are not on the 2026 WADA List. Written by [Maren Holt](https://plainlygraded.com/about/team/) 2 PUBLIC SOURCES · UPDATED 17 OCT 2026 · NO TIES TO SELLERS [How we source](https://plainlygraded.com/how-we-source/) ## What is Tirzepatide? Tirzepatide is a peptide drug that activates the GIP and GLP-1 receptors. It is approved and prescribed under the brand names Mounjaro and Zepbound. ## What is Tirzepatide claimed to do, and what does the evidence show? **Overall grade** - Approved **Strongest evidence** Phase 3 trials | Use | Claimed | Shown | Grade | | --- | --- | --- | --- | | Type 2 diabetes and chronic weight management | Lowers blood sugar and body weight | Approved by the FDA for these uses on the basis of phase 3 trials. See the label for exactly what was approved.[1] | Approved | ## What are the known risks and side effects of Tirzepatide? The approved labels list the known side effects and warnings, including a boxed warning. We link to the label rather than restate it. Who should be especially careful - **People with a history of eating disorders.** Weight-loss drugs can make disordered eating harder to manage. NEDA and 988 can help. - **People who are pregnant, trying to get pregnant or breastfeeding.** There is no human data in pregnancy. - **Anyone under 18.** It has not been studied in young people. Get medical help now if you have - Swelling of the face, lips or throat, trouble breathing, chest pain, a racing heart or fainting. **Call 911.** - Redness spreading from an injection site, warmth, pus or a fever. Get same-day care. - Severe stomach pain that won't go away, with or without vomiting. Get same-day care. - Unsure what you took or whether a reaction is serious: **Poison Control 1-800-222-1222** (free, 24 hours). - Thoughts of harming yourself: call or text **988**. If food, weight or exercise feels out of control You are not alone. Talk to someone at the [NEDA](https://www.nationaleatingdisorders.org/) helpline, or call or text 988. ## Is Tirzepatide legal? Approved as Mounjaro (type 2 diabetes) and Zepbound (chronic weight management).[1] Every status change for Tirzepatide is logged with its date and source in the [regulatory tracker entry for Tirzepatide](https://plainlygraded.com/regulatory/#tirzepatide). ## Is Tirzepatide banned in sport? GLP-1 agonists are not prohibited; WADA says the status is unchanged for 2027.[2] Anti-doping rules work on strict liability: a positive test counts whatever the label said. ## What don't we know about Tirzepatide? Still unknown - How it compares directly with retatrutide: no head-to-head result has been published. Why this page has no dosing We don't publish doses, schedules or mixing instructions for Tirzepatide or any unapproved peptide. No human dose has been established for most of these uses, so we list what to ask a licensed prescriber instead. [Here's why, and who can legally answer](https://plainlygraded.com/why-we-dont-give-dosing/) ## What should you tell your doctor if you're using Tirzepatide? Tell them exactly what you took, for how long, and where it came from, and bring the label. These questions can help the conversation: - Is there an approved treatment for my goal that has been tested in people? - What should I watch for, and which symptoms mean I should stop and call you? - Could it interact with the medicines I already take? ### Compare next - [Retatrutide](https://plainlygraded.com/peptides/retatrutide/) **Sources** 1. DailyMed / US Food and Drug Administration. Mounjaro and Zepbound (tirzepatide) prescribing information. 2. World Rugby. [WADA publishes 2027 Prohibited List (GLP-1 agonists unchanged)](https://www.world.rugby/keep-rugby-clean/news/1048285/wada-publishes-2027-prohibited-list), 2026-10-06. (news report) **Changelog** 17 OCT 2026 Draft. Statuses read from the regulatory record dated 2026-10-17. Spotted an error? [Report it](https://plainlygraded.com/corrections/). We never change a page's updated date without changing its content. --- We collect and compare information from public, cited sources. We cannot guarantee that it is complete, current or correct. This is not medical advice. Only a doctor can prescribe, and a doctor should confirm anything you read here before you act on it. Canonical page: https://plainlygraded.com/peptides/tirzepatide/