Tirzepatide
| Above: Tirzepatide molecular structure
Below: animation of a 3D tirzepatide molecule | |
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| Pronunciation | /tɜːrˈzɛpətaɪd/ tur-ZEP-ə-tyde | 
| Trade names | Mounjaro, Zepbound | 
| Other names | LY3298176, GIP/GLP-1 RA | 
| AHFS/Drugs.com | Monograph | 
| MedlinePlus | a622044 | 
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| Routes of administration | Subcutaneous | 
| Drug class | Antidiabetic, GLP-1 receptor agonist | 
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| Bioavailability | 80% | 
| Protein binding | Albumin | 
| Metabolism | Proteolytic cleavage, β-oxidation of fatty diacid section and amide hydrolysis | 
| Elimination half-life | 5 days | 
| Excretion | Urine and faeces | 
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| Formula | C225H348N48O68 | 
| Molar mass | 4813.527 g·mol−1 | 
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Tirzepatide is an antidiabetic medication used to treat type 2 diabetes and for weight loss. Tirzepatide is administered via subcutaneous injections (under the skin). In the United States, it is sold under the brand name Mounjaro for diabetes treatment and Zepbound for weight loss and treatment of obstructive sleep apnea.
Tirzepatide is a gastric inhibitory polypeptide (GIP) analog and a GLP-1 receptor agonist. The most common side effects include nausea, vomiting, diarrhea, decreased appetite, constipation, upper abdominal discomfort, and abdominal pain.
Developed by Eli Lilly and Company, tirzepatide was approved for treatment of diabetes in the US in May 2022, in the European Union in September 2022, in Canada in November 2022, and in Australia in December 2022. The US Food and Drug Administration (FDA) considers it a first-in-class medication. The FDA approved it for weight loss in November 2023. Also in November 2023, the UK Medicines and Healthcare products Regulatory Agency revised the indication for tirzepatide (as Mounjaro) to include the treatment for weight management and weight loss. In December 2024, the FDA revised the indication for tirzepatide (as Zepbound) to include the treatment of moderate to severe obstructive sleep apnea.