Byetta vs Mounjaro
Compare Byetta and Mounjaro on active ingredient, dosing schedule, FDA-approved use and pharmacy acquisition cost.
By Sam Reed · Founder and data leadVerified Feb 11, 2026
The short answer
Byetta contains Exenatide and Mounjaro contains Tirzepatide. These are different molecules, so their dosing and clinical evidence differ.
Side by side
Costs are what a pharmacy pays to acquire each product, from CMS NADAC. Not a retail price, and not what you would pay.
= better value on that rowScroll sideways on small screens — the first column stays pinned
Data sources · cited with retrieval dates
- CMS NADACNational Average Drug Acquisition Cost, weekly fileretrieved Feb 11, 2026
- CMS Medicare Part DPrescriber public use file, by geography and drugretrieved Feb 11, 2026
- CMS State Drug UtilizationQuarterly Medicaid prescription and reimbursement dataretrieved Feb 11, 2026
NADAC figures are pharmacy acquisition costs, not retail prices and not what you will pay. This content is educational and is not medical advice.