Mounjaro (tirzepatide) settled a long-running debate about whether adding GIP agonism to GLP-1 would help or hurt in type 2 diabetes.
Tirzepatide engages two incretin pathways at once, producing greater HbA1c and weight reduction than GLP-1 agonism alone in head-to-head trials. The once-weekly subcutaneous injection improves glycemic control in adults with type 2 diabetes alongside diet and exercise.
Tirzepatide was subsequently approved as Zepbound for chronic weight management and obstructive sleep apnea, making it one of the highest-value assets in the industry. Supply constraints, compounding disputes, and outcomes data have defined its commercial trajectory.