Switching from Mounjaro® to Wegovy® is generally safe and is a common transition for many patients. Because both medications are GLP-1–based weight loss treatments, the switch is usually designed to be smooth while maintaining weight loss progress.
This guide explains the typical switching timeline, how the Wegovy® starting dose is chosen, and what to expect during the transition.
Overview
Use this guide to understand:
When to start Wegovy® after Mounjaro®
How your Wegovy® starting dose is determined
What to expect during the switch from Mounjaro® to Wegovy®
When to start your new treatment
In most cases, no long washout period is required when switching from Mounjaro® to Wegovy®.
Typical approach:
Take your final scheduled dose of Mounjaro®
Wait 7 days
Start your first dose of Wegovy® on your usual injection day
This one-week interval helps your body begin clearing Mounjaro® while introducing Wegovy®, which reduces the risk of overlapping side effects.
How the Wegovy® starting dose is chosen
You do not always need to restart at the lowest Wegovy® dose (0.25 mg) when switching from another GLP-1 medication.
MedExpress prescribers select your Wegovy® starting dose based on:
Your current Mounjaro® dose strength
How long you have been on that dose
Your history of side effects and tolerability
Tailoring the starting dose helps maintain treatment effectiveness while keeping the transition comfortable for your digestive system.
What to expect during the switch
Although Mounjaro® and Wegovy® are similar treatments, they contain different active ingredients. During the first few weeks after switching, you may notice:
Adjustment period
Your appetite may feel slightly different while your body adapts to Wegovy®. This is normal and usually temporary.
Possible side effects
Some people experience mild, short-term symptoms such as:
Nausea
Changes in bowel habits
Mild digestive discomfort
These effects usually settle as you continue following the standard Wegovy® titration schedule.
Key takeaway
Switching from Mounjaro® to Wegovy® is usually straightforward. Most patients wait 7 days after their last Mounjaro® dose before starting Wegovy®, and the starting dose is personalised based on prior treatment and tolerability.
If you still need help after reviewing the information above, additional assistance is available.