Frequently Asked Questions
Common questions about Mounjaro pricing and availability in the UK.
How much does Mounjaro cost in the UK?
Mounjaro prices vary significantly between pharmacies. The 2.5mg starting dose ranges from around £130 to £230 per month. Higher doses like 15mg can cost £170 to £320+ per month. Using a price comparison tool like WeightCompare can save you over £100 per month.
Do I need a prescription for Mounjaro?
Yes. Mounjaro (tirzepatide) is a prescription-only medicine (POM) in the UK. You need a valid prescription from a registered prescriber. Most online pharmacies on our site offer their own online consultation service where a prescriber can assess your suitability and issue a prescription.
What doses does Mounjaro come in?
Mounjaro is available in 6 doses: 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg, and 15mg. You typically start on 2.5mg for 4 weeks, then increase to 5mg. Your prescriber will guide dose increases (titration) based on your response and tolerability.
Is Mounjaro available on the NHS?
Mounjaro was approved by NICE for NHS use for type 2 diabetes. For weight management, it is primarily available through private prescriptions. Availability on the NHS for weight loss may expand in the future. Most people currently buy Mounjaro privately from online pharmacies.
What is the difference between Mounjaro and Wegovy?
Mounjaro (tirzepatide) works on two hormones (GIP and GLP-1), while Wegovy (semaglutide) works on one (GLP-1). Clinical trials showed Mounjaro produced greater average weight loss (around 22% vs 15% body weight). Both are prescription-only injectable medications given once weekly.
How do I use a Mounjaro pen?
Mounjaro comes in a pre-filled, single-use pen (KwikPen). You inject it once a week, on the same day each week, into your stomach, thigh, or upper arm. Each pen is used once and disposed of safely. Your pharmacy or prescriber will provide injection guidance.
What are the common side effects of Mounjaro?
The most common side effects are gastrointestinal: nausea, diarrhoea, decreased appetite, vomiting, and constipation. These are usually mild to moderate and tend to improve as your body adjusts. Starting on the lowest dose (2.5mg) and gradually increasing helps minimise side effects.
How do I know if a pharmacy is legitimate?
All pharmacies on WeightCompare are registered with the General Pharmaceutical Council (GPhC). You can verify any pharmacy by checking their GPhC number on the official GPhC register. We link directly to each pharmacy's GPhC registration from our comparison table.
Are the prices on WeightCompare accurate?
We update prices daily by checking pharmacy websites. However, prices can change at any time. Always confirm the final price directly with the pharmacy before ordering. If you spot an incorrect price, please let us know.
Does WeightCompare earn commission?
Yes, we earn a small referral commission when you visit a pharmacy through our links. This never affects the price you pay or how pharmacies are ranked. Pharmacies are always listed in order of price, lowest first. We are completely transparent about this.
Still have questions? Get in touch
Compare prices now