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Mounjaro vs. Zepbound

Published on 
February 3, 2025
Virta Team

Mounjaro and Zepbound target different primary conditions. Mounjaro is a dual GIP and GLP-1 agonist for type 2 diabetes, while Zepbound, a semaglutide-based GLP-1 agonist, focuses on chronic weight management. Mounjaro delivers superior HbA1c reductions and comparable weight-loss benefits to Zepbound. Neither has significant off-label uses. Side effects like nausea overlap, though Mounjaro’s dual mechanism may elevate thyroid tumor risks. Mounjaro costs $1,135/month, while Zepbound’s cost is unspecified in the data. Neither drug faces shortages.

How Mounjaro Works

Enhances the effects of both incretin hormones. GIP improves insulin sensitivity and enhances fat metabolism, while GLP-1 reduces appetite, delays gastric emptying, and promotes insulin secretion, making it effective for blood sugar control and weight loss.

Common Side Effects

Nausea, vomiting, diarrhea, decreased appetite, and indigestion

Serious Potential Side Effects

Pancreatitis, thyroid tumors (potential risk), gallbladder issues, kidney problems, and serious allergic reactions

How Zepbound Works

Enhances the effects of both incretin hormones. GIP improves insulin sensitivity and enhances fat metabolism, while GLP-1 reduces appetite, delays gastric emptying, and promotes insulin secretion, making it effective for blood sugar control and weight loss.

Common Side Effects

Nausea, vomiting, diarrhea, decreased appetite, and indigestion

Serious Potential Side Effects

Pancreatitis, thyroid tumors (potential risk), gallbladder issues, kidney problems, and serious allergic reactions

Brand Name

Mounjaro
Zepbound

Generic Name

Tirzepatide
Tirzepatide

Overview

Dual GIP and GLP-1 receptor agonist for type 2 diabetes management, showing promise in significant weight loss through appetite regulation and enhanced insulin sensitivity.
Dual GIP and GLP-1 receptor agonist for chronic weight management, showing promise in significant weight loss through appetite regulation and enhanced insulin sensitivity.

Year Approved

2022
2023

Category

Dual GIP and GLP-1
Dual GIP and GLP-1

Indicated for

Type 2 diabetes management
Chronic weight management in adults with obesity or overweight with related conditions

Administration type

Injectable
Injectable

Also used (but not approved) for

Weight Management
Weight Management

Frequency

Once / week
Once / week

Typical dose range

2.5–15 mg
2.5–15 mg

Average cost per month

$1,135
$1,125

Availability

No current shortages
No current shortages