Can you use GLP-1’s if You Have a Heart Condition?

Posted on August 10, 2026 by Sally-Anne Turner

It can seem like a catch-22 for many people who want to lose weight medically after exhausting all other options.

They have likely been living for some time with extra weight, have tried to lose weight using various methods to find no substantial change. Being diagnosed with obesity or carrying extra weight will then likely lead to secondary issues with their heart. Or maybe it is the other way around. Either way, many medical providers in the online world will not offer those with heart issues GLP-1 medications, even with clinical oversight.

This can be a real downer and can lead many to think that there is no way to improve their health by losing weight.

At the Bodyline Clinic, we pride ourselves on being able to potentially provide weight loss services to people who may be rejected from online pharmacies or online doctors' surgeries for GLP-1s. One area of complex care that we offer is weight loss medications to those who have cardiovascular conditions and may also want to lose weight.

Each case of weight loss is unique, and here, we will walk you through why people may be rejected for medicated weight loss with heart disease, and how our team may be able to help.

Heart Conditions and Weight

Heart conditions can be loosely defined as a chronic condition where the heart cannot pump blood effectively to meet the body's needs. When it comes to heart conditions and health, this is not an uncommon condition in the UK.

According to the British Heart Foundation:

1. Total cardiovascular disease affects over 8 million people (split evenly with over 4 million men and 4 million women).
2. Coronary heart disease affects 2.3 million people (about 1.5 million men and 830,000 women).
3. Over 1 million people have heart failure.
4. Around 1.4 million living people are heart attack survivors.
5. Approximately a quarter of all deaths in the UK each year are due to heart disease, with as many as 47,000 deaths under the age of 75 being due to some sort of heart failure.

Common symptoms of mild to severe heart failure include:

1. Fatigue
2. Ankle swelling
3. Palpitations
4. Tachycardia (fast heart rate)
5. Bradycardia (slow heart rate)
6. Fainting spells
7. Dizziness
8. Headaches
9. Limited exercise tolerance

Carrying extra weight puts more pressure on the heart, increases inflammation and ups the likelihood of metabolic issues. Those with heart conditions are also more likely to have comorbidities with type 2 diabetes and hypertension, adding to the complexity of managing their health.

Recent clinical evidence suggests that rapid or excessive weight loss in those who are overweight can be detrimental to their health. This is why many online pharmacies and doctors' surgeries will not approve those who have heart conditions for medicated weight loss. If you want to undertake weight loss using GLP-1s, you will need extensive clinical oversight and an individualised assessment of your health — no tick-box exercises.

Can You Take GLP-1s if You Have Heart Failure?

It is something of a frustrating answer.

Simply put, it depends on the type and the severity of the heart condition that you have, the specific weight loss option and type that are being considered, and other secondary complications that you may have.

Research from the New England Journal of Medicine suggests that many injectable GLP-1 receptor agonists may be used cautiously in those who have heart failure or heart conditions. The SELECT trial demonstrated that semaglutide injectables reduced major adverse cardiovascular events in those with established cardiovascular disease and obesity. However, this study included relatively few people who had symptomatic heart failure.

For those with heart failure and preserved ejection fraction, emerging evidence from the STEP HFpEF trials suggests that semaglutide can improve symptoms, physical function and overall quality of life, whilst also enabling weight loss.

In people diagnosed with heart failure with reduced ejection fraction (HFrEF), evidence for GLP-1 receptor agonists remains more limited than in HFpEF. Earlier trials such as FIGHT found no significant clinical benefit from liraglutide and raised potential safety signals, although subsequent analyses have produced more encouraging findings for semaglutide. Further dedicated trials are therefore needed to establish its safety and efficacy in people who have HFrEF.

What About Oral GLP-1s?

With the release last month of the Wegovy pill and the upcoming Eli Lilly pill hitting the UK in September, more people are wanting to make the switch from injectable GLP-1s to oral options. Do they present similar issues when paired with heart disease?

HFpEF (Preserved Ejection Fraction)

If you have preserved ejection fraction and want to take oral GLP-1s, the evidence is generally positive, especially if the person taking them is obese. This therapy appears to improve both symptoms and function of the heart.

HFrEF (Reduced Ejection Fraction)

As with injectable GLP-1s, the research is less conclusive. It does not highlight major issues when taking oral semaglutide, but there is less evidence of overall positive results.

Risks and Safety Considerations

When considering any kind of medicated weight loss, there are a few cardiovascular safety issues that providers need to look out for and manage on a case-by-case basis.

Heart Rate Changes

These are of particular concern. GLP-1 receptor agonists can cause a temporary and modest increase in the resting heart rate, which is approximately 2 to 5 beats per minute. This is generally well tolerated in most patients, but in those with heart failure, particularly those who have a reduced ejection fraction, it can become heightened, making them more sensitive to tachycardia.

Fluid Balance and Dehydration

GLP-1s can cause significant gastrointestinal side effects, which include nausea, vomiting and diarrhoea. In those who have heart failure and are also taking diuretics or SGLT2 inhibitors, these effects can precipitate dehydration and electrolyte imbalances. These complications can destabilise previously controlled heart failure and may necessitate hospital admission. They can also lead to hypokalaemia, hyponatraemia and acute kidney injury.

When you are taking any GLP-1 medication and have heart disease, your clinical team should be monitoring you for:

1. Worsening breathlessness or ankle/lower leg swelling — signs of fluid retention or heart failure decompensation. You may need to start taking water retention tablets.
2. Dizziness or postural hypotension — standing up and feeling dizzy, more of a concern if you are taking heart medications.
3. Rapid weight changes — these can point to fluid loss or gain, neither of which is good. You may need fluid retention tablets to stabilise.
4. Palpitations or irregular heartbeat — fluttering or pumping sensations in your chest.
5. Severe, persistent abdominal pain with or without vomiting — may point to pancreatitis requiring urgent assessment.
6. Symptoms of gallstones — right upper abdominal pain and nausea.
7. Visual changes — particularly for people with diabetes and pre-existing retinopathy.

Monitoring for renal function, electrolyte imbalances and blood pressure is essential, more so in the first three months of taking these medications. Those who have heart issues and want to lose weight this way should note that they will need to report persistent issues promptly to their prescriber.

You should not adjust your heart condition medications without medical guidance.

When to Seek Help if Using GLP-1s

If you have any kind of cardiovascular condition or heart failure and want to consider medicated weight loss options, consultation before beginning treatment is essential. Before you start any GLP-1 medication, you should arrange an appointment with your GP as well as your cardiologist and your prescribing team to discuss your specific clinical situation.

This is more important if you have been diagnosed with heart failure in the last six months, have recently experienced worsening symptoms, or have other medical conditions. If you are on any heart medication, or have recently changed your dosage, you should also specify this at all of the consultations.

You should contact your GP or heart failure nurse immediately if you experience any of the following symptoms whilst taking either injectable or oral weight loss medications:

1. Increasing breathlessness, more so if you are lying down or resting.
2. Rapid weight gain (more than 2kg in three days).
3. Ankle or leg swelling.
4. Persistent nausea, vomiting or loose bowel movements that last over 24 hours.
5. Feeling dizzy, light-headed or physically fainting.
6. Chest pain, irregular heartbeat or palpitations.
7. Reduced urine output or dark urine.
8. Noticeable fatigue or weakness.
9. Severe and persistent abdominal discomfort — this can point to pancreatitis.
10. Abdominal pain on the upper right side — this can be symptomatic of gallstones.
11. Vision issues if you are taking GLP-1s with diabetes.

If at any point during treatment you are concerned about side effects or feel unwell, please contact your prescribing team as soon as possible for guidance.

Complex Care with Bodyline

When you come to the Bodyline Clinic and you are approved for weight loss medications with a heart condition, we will deliver them to you via a personalised, structured and clinician-led treatment model.

This will ensure:

1. Personalised GLP-1 treatment plans aligned to any clinical cardiovascular and comorbidity needs.
2. Ongoing medical supervision and monitoring, in-person or online.
3. Heart-safe diet guidance, including meal replacement options where appropriate.
4. Physical activity planning which is risk assessed.
5. Psychological coaching and adherence support.
6. Tracking of clinical markers like blood pressure, lipids, weight and blood glucose.

These are just for starters. Based on your heart health and any comorbid conditions you may have, you may need more clinical assessments and monitoring tests. We may also recommend you sign up to NHS weight loss programmes to use in tandem with our medicated options.

We know how it may seem. You have a heart condition and have been rejected for weight loss medications from online pharmacies and doctors' surgeries. Our team at the Bodyline Clinic assess each person's suitability for GLP-1 medication and will conduct a thorough assessment of your health. We may need to reach out to your GP, but rest assured that with the help of our clinically backed treatment and our clinical team, we will aim to provide you with the highest level of medicated weight loss care.

So, contact our team today to book your free consultation.

FAQs

Does a Heart Condition Prevent You from Using GLP-1s?

It depends on the GLP-1 medication and the severity of the heart condition. In short, it's hard to say without a clinical assessment from a medically registered team.

Is Heart Disease Linked to Being Overweight?

Unfortunately, it is, with heart disease being one of the most common comorbidities of being overweight. There is evidence that suggests that GLP-1 injectables and oral pills can have favourable results on both weight loss and heart health, reducing both at the same time.

What Care Is Offered at the Bodyline Clinic?

This will depend on the severity of your heart health and any existing comorbid conditions that you have. As an overview, we offer all of our complex care patients:

1. Personalised GLP-1 treatment plans.
2. Medical supervision and monitoring.
3. Heart-safe diet guidance.
4. Physical activity planning.
5. Psychological coaching.
6. Tracking of clinical markers.