Overview
This article explains heart palpitations as a possible side effect of Wegovy and Mounjaro, 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 weight loss medication.
Why heart palpitations can happen
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.
What can help manage heart palpitations
If symptoms are mild, the following steps may help you monitor and reduce palpitations:
1. 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.
2. Reduce common triggers
Certain substances can raise heart rate and make palpitations more noticeable. Consider reducing or avoiding:
Caffeine
Alcohol
Smoking or nicotine products
When to contact your 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 to contact 999
Contact 999 immediately:
If heart palpitations are accompanied by any heart attack symptoms such as chest pain, tightness in the chest, neck, jaw, arm or back as it can be a sign of a cardiac event.
Need extra support?
If you would like to discuss your symptoms in more detail, the clinical team is available to help. Reach out for personalised advice on managing heart palpitations while using Wegovy or Mounjaro.
Learn more
For tailored advice on managing side effects and understanding what to expect from treatment, visit the Weight Loss Guide.
If you still need help after reviewing the information above, additional assistance is available