Is Ozempic safe for weight loss? Risks and safety overview

Ozempic (semaglutide) is a prescription medication developed to help people with type 2 diabetes to manage their blood sugar levels.

Many people who take Ozempic for type 2 diabetes have noticed it can also lead to weight loss. As a result, many people who do not have type 2 diabetes are interested in using Ozempic to help lose weight. There have also been reports of doctors prescribing Ozempic off-label as a weight loss medication – this can lead to avoidable risks.

However, in the UK, Ozempic is only approved to manage type 2 diabetes. It is not licensed as a weight loss treatment, and using it solely for that purpose is not recommended.

This article explains what current research and UK medical guidance say about Ozempic and weight loss.

Medically reviewed by

Dr Kathryn Basford

Last reviewed: 16 Jan 2026

Is Ozempic safe for weight loss?

Ozempic is not recommended for weight loss in the UK because it’s not licensed for that purpose. While Ozempic is generally considered safe when prescribed for type 2 diabetes, weight loss is a side effect of this medication and not the intended outcome.

The active ingredient in Ozempic is semaglutide. This is also the active ingredient in Wegovy, a different medication that is licensed for weight loss in different doses.

Learn more about safe Ozempic doses.

Is Ozempic approved for weight loss?

No, Ozempic is not approved for weight loss in the UK. The Medicines and Healthcare products Regulatory Agency (MHRA) has licensed Ozempic only for the treatment of type 2 diabetes, to be used alongside a reduced-calorie diet and regular exercise.

Doctor’s advice: “When used for weight management, semaglutide can be taken for as long as it continues to be effective and suitable for you. Wegovy is the only semaglutide medication licensed for weight loss in the UK, and you should be monitored by a doctor throughout your treatment.” – Dr Kathryn Basford, Online Doctor.

What are the side effects of Ozempic?

Ozempic can cause side effects. Most are mild and temporary, but some are more serious. Understanding these potential side effects can help you manage them effectively, to help you use the medication safely. Talk to your doctor if you have any persistent or severe side effects with Ozempic.

Common side effects

Most people can take Ozempic without major issues, but some side effects are common (affecting between 1 in 10 and 1 in 100 people), especially during the first few weeks of treatment.

Common side effects can include:

feeling sick (nausea)
vomiting
diarrhoea
stomach pain
constipation
decreased appetite
worsening diabetic eye disease (retinopathy complications) in people with pre-existing eye problems

These side effects are typically temporary and often improve during the first few weeks. If you find them particularly uncomfortable or they do not go away after a few days, talk with your doctor.

Serious risks

While rare (affecting between 1 in 1,000 and 1 in 10,000 people) more serious side effects can occur with Ozempic. If you experience any of the following, speak to a doctor or call 111:

inflammation of the pancreas (pancreatitis)
gallbladder issues, such as gallstones
severe allergic reactions, including anaphylaxis

If you get severe or life-threatening symptoms, such as signs of anaphylaxis (difficulty breathing, swelling of the face or throat) or sudden vision changes from diabetic eye complications, call 999 immediately. For less urgent but concerning reactions, such as persistent nausea, vomiting, or mild allergic reactions, you can contact NHS 111 for guidance.

Who should avoid Ozempic?

Certain health conditions or risk factors may make Ozempic unsuitable for some people. Before starting treatment, speak with your doctor to make sure it is safe and appropriate for you.

Ozempic should not be used by:

people allergic to semaglutide or any of the ingredients
people with type 1 diabetes
people who are pregnant or breastfeeding
anyone under 18 years old

Medications containing semaglutide like Ozempic should be used with caution if you have a history of pancreatitis. Discontinue treatment immediately if pancreatitis is suspected, and do not restart it if the diagnosis is confirmed.

Before prescribing Ozempic, your doctor will check your medical history and check for any of these conditions. If you are at risk of any of the above, your doctor may recommend an alternative treatment that is safer for you.

Frequently asked questions

Can I take Ozempic for weight loss if I do not have diabetes?

No, Ozempic is not licensed for weight loss in the UK. It can only be prescribed for type 2 diabetes on the NHS.

People without diabetes who want to use semaglutide for weight management should request Wegovy, the version licensed for this purpose.

Are there alternatives to Ozempic for weight loss?

Yes. Wegovy is the approved form of semaglutide for people who want to lose weight. It works in the same way as Ozempic but is specifically licensed for weight loss.

Another medication, Mounjaro (tirzepatide), is also approved for weight management and works through a similar mechanism to help reduce appetite and support weight loss. Lifestyle changes remain a key component of any weight loss plan, whether or not medication is prescribed.

Discover more alternatives to Ozempic.

Does Ozempic increase the chance of cancer?

Research so far shows that semaglutide (Ozempic) does not appear to increase the risk of pancreatic or thyroid cancer. A meta-analysis of clinical trials, real-world studies and a comprehensive safety review have all found no clear link between semaglutide use and these cancers.

What is ‘Ozempic face’?

‘Ozempic face’ is an informal term for changes in facial appearance due to rapid weight loss, such as sagging skin or a more tired look. It is not a side effect of the medicine itself but a result of losing fat quickly, which can affect how your face looks.

Medically reviewed by

Dr Kathryn Basford

Dr Kathryn Basford is a GP based in London. She graduated from the University of Manchester and completed her GP training through Whipps Cross Hospital in London. Outside of work she enjoys baking and keeping active, running marathons, swimming, and triathlons.

Last reviewed: 16 Jan 2026