Tirzepatide: A novel, first-in-class, dual GIP/GLP-1 receptor agonist

The objective of this article is to review the efficacy and safety of tirzepatide and discuss its potential role in the treatment of type 2 diabetes. Tirzepatide is a novel once-weekly dual GIP and GLP-1 receptor agonist which has been studied in the SURPASS clinical trials in doses of 5 mg, 10 mg, and 15 mg. Tirzepatide phase III clinical trials, SURPASS-1 through SURPASS-5, demonstrate that this medication is safe and effective in treating type 2 diabetes both with and without a variety of background medications versus placebo, semaglutide, insulin degludec, and insulin glargine in different patient populations. Most adverse events were gastrointestinal in nature, with a relatively low withdrawal rate in the active treatment arms. It seems likely that tirzepatide will be recommended as a preferred option in the American Diabetes Association treatment algorithm for high glucose lowering effects in patients with a compelling need for low hypoglycemia risk and weight loss. However, the positioning of tirzepatide in the treatment algorithm will ultimately be dependent on the results of the cardiovascular outcomes trial (CVOT) or other outcome-based trials. Tirzepatide is effective for treating type 2 diabetes by lowering glycated hemoglobin and contributing to significant weight loss.