Overview
Switching from Mounjaro® to Wegovy® is a common transition for MedExpress patients continuing GLP-1 weight-loss treatment, and the switch is designed to keep your weight-loss progress on track while minimising overlapping side effects.
Use this article when you want to:
Understand when to start Wegovy® after your final Mounjaro® dose
Find out how your Wegovy® starting dose is determined when switching from Mounjaro®
Know what to expect in the first few weeks after switching from Mounjaro® to Wegovy®
Is It Safe to Switch From Mounjaro® to Wegovy®?
Switching from Mounjaro® to Wegovy® is generally safe and is a common transition for MedExpress patients. Because both medications are GLP-1-based weight loss treatments, the switch from Mounjaro® to Wegovy® is usually designed to be smooth while maintaining your weight-loss progress.
This article explains the typical timeline for switching from Mounjaro® to Wegovy®, how your Wegovy® starting dose is chosen, and what to expect during the transition.
When Should I Start Wegovy® After Stopping Mounjaro®?
In most cases, no long washout period is required when switching from Mounjaro® to Wegovy®.
The typical approach is:
Take your final scheduled dose of Mounjaro®.
Wait 7 days.
Start your first dose of Wegovy® on your usual injection day.
This 7-day interval between your last Mounjaro® dose and your first Wegovy® dose helps your body begin clearing Mounjaro® while introducing Wegovy®, which reduces the risk of overlapping side effects.
How Is My Wegovy® Starting Dose Chosen When Switching From Mounjaro®?
You do not always need to restart at the lowest Wegovy® dose (0.25mg) when switching from Mounjaro®.
MedExpress prescribers select your Wegovy® starting dose based on:
Your current Mounjaro® dose strength
How long you have been on that Mounjaro® dose
Your history of side effects and tolerability on Mounjaro®
Tailoring your Wegovy® starting dose to your previous Mounjaro® treatment helps maintain your weight-loss progress while keeping the transition comfortable for your digestive system.
What Should I Expect After Switching From Mounjaro® to Wegovy®?
Although Mounjaro® and Wegovy® are similar treatments, they contain different active ingredients — Mounjaro® contains tirzepatide, and Wegovy® contains semaglutide. During the first few weeks after switching from Mounjaro® to Wegovy®, you may notice the following.
Adjustment Period
Your appetite may feel slightly different while your body adapts to Wegovy®. This change in appetite is normal and usually temporary.
Possible Side Effects
Some people experience mild, short-term side effects when switching to Wegovy®, such as:
Nausea
Changes in bowel habits
Mild digestive discomfort
These side effects usually settle as your body adjusts during Wegovy®'s standard titration schedule — the gradual, once-weekly dose increases followed by all new Wegovy® patients.