Overview
Heart palpitations are a possible side effect of Wegovy® and Mounjaro®. This article explains how this symptom may feel, practical steps to help manage it, and when to seek medical support. Use this information if you notice a racing or unusually strong heartbeat while taking either medication.
Use this article when you want to:
Understand why heart palpitations can happen with Wegovy® or Mounjaro®.
Find practical steps to help monitor and manage palpitations.
Know when to contact your GP, call 111, or call 999.
Why Can Heart Palpitations Happen With Wegovy® or Mounjaro®?
Heart palpitations are an uncommon side effect of Wegovy® and Mounjaro®, affecting fewer than 1 in 100 people.
An increased heart rate may feel like:
A fast pulse.
A racing or pounding heartbeat, even while resting.
An increased awareness of your heartbeat (palpitations).
Researchers are still studying why some people experience an increased heart rate while taking weight loss medication such as Wegovy® or Mounjaro®.
What Can Help Manage Heart Palpitations?
If symptoms are mild, the following steps may help you monitor and reduce palpitations.
Monitor Your Heart Rate
Keep track of your resting heart rate, either manually or with a smartwatch or fitness tracker.
Make a note of:
When palpitations occur.
How long they last.
Whether they happen at rest or after certain activities.
This information can be helpful if you need to speak with a clinician.
Reduce Common Triggers
Certain substances can raise your heart rate and make palpitations more noticeable. Consider reducing or avoiding:
Caffeine
Alcohol
Smoking or nicotine products
When Should I Contact My GP or Call 111?
Contact your GP or call 111 if:
You experience repeated palpitations that keep coming back or worsen over time.
You have a family history of heart problems.
When seeking medical advice, make sure you tell your healthcare provider that you are taking weight loss medication, including Wegovy® or Mounjaro®.
When Should I Contact 999?
Contact 999 immediately if heart palpitations are accompanied by any heart attack symptoms, such as chest pain, or tightness in the chest, neck, jaw, arm, or back — this can be a sign of a cardiac event.