GLP-1 weight loss injections such as Wegovy®, Ozempic® and Mounjaro® are effective treatments when prescribed safely and monitored properly. The MHRA has highlighted a rare risk of pancreatitis — so it’s important to know the warning signs. Seek urgent medical advice if you develop severe, persistent upper abdominal pain (especially radiating to the back), with or without nausea and vomiting.
GLP-1 medications (such as Ozempic®/Wegovy® and Mounjaro®) have changed the landscape of medical weight management. For the right patient, used properly and with medical oversight, they can support meaningful weight loss and improved long-term metabolic health.
As with all prescription medicines, there are potential side effects and risks. Recently, the MHRA (Medicines and Healthcare products Regulatory Agency) issued a Drug Safety Update strengthening warnings about an important (but uncommon) risk associated with GLP-1 medications: acute pancreatitis.
At Montpellier Medical, we believe patients deserve both: access to effective treatments and clear safety information — without alarmism. Here’s what you need to know.
What are GLP-1 (and GLP-1/GIP) medications?
GLP-1 receptor agonists are medicines originally developed for type 2 diabetes, and some are also licensed for weight management. The MHRA update covers several medications used in the UK, including:
- Semaglutide (Ozempic®, Wegovy®)
- Liraglutide (Victoza®, Saxenda®)
- Dulaglutide (Trulicity®)
- Exenatide (Byetta®, Bydureon®)
- Tirzepatide (Mounjaro®) — a dual-acting GLP-1/GIP medication
These medicines reduce appetite and improve metabolic regulation, helping many patients reduce excess weight safely and sustainably.
What has the MHRA warned about?
The MHRA has strengthened wording in product information because there have been rare reports of severe pancreatitis, including necrotising and fatal cases. The overall frequency remains uncommon, but early recognition matters.
This update is not designed to create fear — it is designed to ensure both clinicians and patients know what to look out for.
What is pancreatitis?
Pancreatitis means inflammation of the pancreas, an organ involved in digestion and blood sugar regulation.
It can range from mild to severe. The key issue is that severe pancreatitis needs rapid medical assessment and treatment — which is why the symptom guidance is so important.
Symptoms to watch for
If you are taking a GLP-1 medication, seek urgent medical attention if you develop:
Severe, persistent abdominal pain…
Especially pain that:
- is strong and continuous (not fleeting cramps)
- does not settle
- may radiate through to your back
- may be accompanied by nausea and vomiting
Pancreatitis can be difficult to recognise early, because some people experience nausea or digestive symptoms when starting GLP-1 medications. However, severe pain that persists is not a “normal” side effect.
BOTTOM LINE: IF IT FEELS SEVERE, PERSISTENT AND UNUSUAL – DON’T WAIT!
Putting this risk into perspective
It’s completely understandable to feel concerned when you hear a serious-sounding risk like pancreatitis — particularly when media headlines focus on worst-case scenarios.
But it’s important to remember: many very commonly used medications carry rare but serious risks.
A good comparison is ibuprofen and other anti-inflammatory painkillers (NSAIDS), which many people view as “simple” and would not think twice about taking. Yet clinically we know NSAIDs can rarely cause serious complications including:
- gastrointestinal bleeding
- kidney injury
- increased risk of cardiovascular events in some individuals
Despite this, NSAIDs are widely used because the approach is sensible and medical: we screen suitability, use the lowest effective dose, advise warning symptoms, and review risks in context.
This is exactly how GLP-1 prescribing should be approached too.
Why a medically-led weight management service is safer
The MHRA also highlights that privately prescribed GLP-1 medications may not always appear clearly in NHS medical records, which can delay diagnosis if someone presents unwell.
This is why Montpellier Medical provides a safe, medically-led, thorough weight management service, including:
- doctor-led prescribing (not automated questionnaires)
- full medical assessment and medication review
- careful screening for suitability and risk including blood test analysis
- structured follow-up and monitoring
- clear advice on side effects versus red flags
- communication with your NHS GP
In short: we don’t just prescribe – we practise medicine.
Reassurance: should most patients be worried?
For the vast majority of suitable patients:
- GLP-1 medications are well tolerated
- most side effects are mild and manageable (nausea, reflux, constipation/diarrhoea)
- serious complications like pancreatitis are uncommon
What matters most is that patients:
- are carefully selected
- receive proper counselling
- are monitored
- know when to seek urgent help
That combination makes this treatment significantly safer than “self-directed” prescribing.
When to seek urgent medical attention
If you are taking Wegovy®, Ozempic®, Mounjaro® (or similar), and develop:
- severe, persistent abdominal pain (especially radiating to the back)
- nausea and vomiting
SEEK URGENT MEDICAL ASSESSMENT IMMEDIATELY.
Need support with safe weight management?
If you’re considering weight loss injections — or you’ve already started treatment elsewhere and want proper medical oversight — Montpellier Medical offers a safe, thorough, medically-led weight management service focused on long-term health and patient safety.
Drop us an email or book an initial weight management consultation via the website.