Healthwise360
Cheapest Weight Loss Injections UK
The cheapest weight loss injection in the UK right now is Wegovy, from £76.94 for a 0.25 mg starter pen at Pharmacy + Me. The cheapest Mounjaro starter pen is £99. We compare the cheapest weight loss injections in the UK at 60+ GPhC registered pharmacies, so you can find the lowest price for your dose in one place.
- 60+ GPhC registered pharmacies
- No paid rankings
- Prices checked 20 September 2026
Numbers on this page are research snapshots, not live quotes.
Cheapest weight loss injections UK at a glance
Looking for cheap weight loss injections in the UK? Here are the cheapest UK weight loss injections at our latest check (20 September 2026). The lowest listed pen price is the cheapest pharmacy we found. Typical is what most pharmacies charge.
| Medicine and dose | Lowest | Typical |
|---|---|---|
| Wegovy 0.25 mg (starter) | £76.94 | £100 |
| Wegovy 2.4 mg (long term) | £135 | £200 |
| Mounjaro 2.5 mg (starter) | £99 | £159 |
| Mounjaro 15 mg (top dose) | £229 | £300 |
Prices are for the pen only. Delivery is not always included. It depends on the pharmacy.
See every dose and pharmacy →Which weight loss injection is cheapest in the UK?
Wegovy is the cheapest weight loss injection in the UK at every month of the first 6 in our price tables. The Wegovy starter pen costs from £76.94, against £99 for Mounjaro. On the dose most people stay on, Wegovy 2.4 mg costs from £135, against £229 for Mounjaro 15 mg. These are different medicines and different doses, so this is a price comparison, not a like for like one.
So, which is the cheapest injection for weight loss? Look at price alone and the table above answers it. But the cheapest weight loss injection is not always the best one for you. In a head to head trial, people lost more weight on Mounjaro. A prescriber can help you choose.
Cheapest GLP-1 injections UK
Both are GLP-1 medicines. Wegovy copies one gut hormone, GLP-1. Mounjaro copies two, GIP and GLP-1. Both are weekly injections, and both are prescription only. Here is our cheapest GLP-1 price comparison for the UK.
| Wegovy | Mounjaro | |
|---|---|---|
| Medicine inside | Semaglutide | Tirzepatide |
| Cheapest starter pen | £76.94 | £99 |
| Cheapest long term pen | £135 (2.4 mg) | £229 (15 mg) |
| Pharmacies we check | 63 | 69 |
Cheapest monthly weight loss injections UK
One pen lasts 4 weeks, so the price of one pen is your monthly cost. The cheapest weight loss injections per month in the UK start at £76.94. But the price goes up as your dose goes up, so look at the first 6 months, not just month 1.
What your first 6 months cost
| Month | Wegovy dose | Wegovy lowest | Mounjaro dose | Mounjaro lowest |
|---|---|---|---|---|
| 1 | 0.25 mg | £76.94 | 2.5 mg | £99 |
| 2 | 0.5 mg | £76.94 | 5 mg | £128.24 |
| 3 | 1 mg | £76.94 | 7.5 mg | £178 |
| 4 | 1.7 mg | £117 | 10 mg | £198 |
| 5 | 2.4 mg | £135 | 12.5 mg | £212 |
| 6 | 2.4 mg | £135 | 15 mg | £229 |
| 6 month total | £617.82 | £1,044.24 |
At typical prices, the first 6 months cost about £913 for Wegovy and £1,418 for Mounjaro.
This table assumes your dose goes up every 4 weeks. Your prescriber decides when, and many people stay on a lower dose for longer. The lowest prices can come from different pharmacies.
Cheapest weight loss injection starter dose UK
With weight loss injections, starter dose pens cost the least. The cheapest weight loss pen in the UK is the Wegovy 0.25 mg starter pen, from £76.94. A cheap starter pen is a good start, but check the price of the dose you will be on in month 3 and beyond. Your maintenance costs matter more over a year.
Where is the cheapest place to buy weight loss injections in the UK?
The cheapest place to buy weight loss injections in the UK is a GPhC registered online pharmacy. At our latest check, these pharmacies had the most of the lowest prices:
- Pharmacy + Me: cheapest for Wegovy 0.25 mg, 0.5 mg, 1 mg and 7.2 mg.
- Medicine Marketplace: cheapest for Wegovy 1.7 mg and 2.4 mg.
- Medicine Marketplace: cheapest for Mounjaro 2.5 mg, 7.5 mg, 10 mg, 12.5 mg and 15 mg.
- Pharmacy + Me: cheapest for Mounjaro 5 mg.
The cheapest place to get weight loss injections in the UK can change each month, so always look at the date next to the price. Use our price pages for your dose:
Cheapest weight loss injections online: what to check
The cheapest weight loss injections online are only a good deal if the pharmacy is safe. Cheap weight loss injections online should always come from a GPhC registered online pharmacy, with a health check by a qualified prescriber.
- Find the GPhC number on the pharmacy's website. It is usually in the footer.
- Check it on the official GPhC register. The name and address should match.
- Expect a health form. Weight loss injections are a prescription only medicine. A real pharmacy will always ask about your weight, health and other medicines.
Is the cheapest weight loss jab safe?
Yes. Cheap weight loss jabs in the UK are safe if they come from GPhC verified pharmacies after a health check. Be careful if a site sells weight loss injections with no health questions, has no GPhC number, sells "pens" on social media, or charges far less than every pharmacy in our table.
Read our pharmacy safety guide →Cheaper options you may see on Google
You may see other low cost weight loss injections in the UK and cheap weight loss medications online. Here is how they compare.
- Daily injections (liraglutide, such as Nevolat or Saxenda). The pen price can look low, but you inject every day and one pen lasts about a week on the full dose. So the month can cost more than it looks.
- The Wegovy pill. A daily tablet with the same medicine as Wegovy. Check the current price before you compare it with the injection. Read our Wegovy pill guide →
- Orlistat tablets. A low cost tablet, not an injection. It works in a different way, and most people lose much less weight than on Wegovy or Mounjaro.
- Ozempic. Ozempic is licensed for type 2 diabetes, not weight loss. UK pharmacies should not sell it to you for weight loss.
Affordable weight loss injections in the UK, like any cheap weight loss injection in the UK, still need a prescription. Cheap weight loss medication from a site with no health check is not safe.
Can you get weight loss injections cheaper on the NHS?
Yes, if you qualify. On the NHS, you pay a normal prescription charge in England, or nothing in Scotland, Wales and Northern Ireland. But only some people can get them right now.
- Mounjaro: GPs in England can prescribe it for people with the greatest need, starting with a BMI of 40 or more and several weight related health problems.
- Wegovy: through specialist weight management services, usually for a BMI of 35 or more with a weight related health problem, for up to 2 years.
Most people get private weight loss injections in the UK. The cheapest private weight loss injections in the UK are on our price pages. For the cheapest private weight loss treatment in the UK, compare prices for your dose before each order.
How we find the cheapest prices
This cheapest weight loss injections UK comparison only uses pharmacies from our UK pharmacy listings that pass the same 5 checks. No pharmacy can pay to rank higher.
- GPhC registration. We check each pharmacy on the official GPhC register.
- Safe prescribing. A prescriber must check your health before any pen is sent.
- Full price. We record the price of every dose in our multi pharmacy price tables.
- Delivery. We check cold packing, delivery times and tracking.
- Support. We look at dose advice and how easy it is to get help.
We record the standard prices available on the date shown on this page. Prices, fees and offers can change after that date, so check the provider’s final price before proceeding. First-order codes are not included. Featured partners appear separately from the price tables and cannot change the price-based order.
Read how we check prices →FAQs
What is the cheapest weight loss injection in the UK?
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Wegovy, from £76.94 for a 0.25 mg starter pen at our latest check. The cheapest Mounjaro starter pen is £99.
Are the cheapest weight loss injections in the UK safe?
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Yes, if they come from a GPhC registered pharmacy and a prescriber checks your health first. Never buy from a site that does not ask about your health.
Do prices include delivery?
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Not always. It depends on the pharmacy. Many add a delivery charge at checkout because the pen must stay cold.
Why does the price at checkout look different?
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Offers, delivery and consultation fees change often. We show standard prices from our last check, so always check the final price before you pay.
Can I switch to a cheaper pharmacy?
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Yes. A new pharmacy will do its own health check first. Tell them your current dose so you can carry on without a break.
How often do you check prices?
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We show the date when the prices on this page were checked. Provider prices, delivery fees and offers can change after that date, so confirm the final amount directly with the provider before proceeding.
Which is cheaper, Wegovy or Mounjaro?
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Wegovy is cheaper at every dose step. Over the first 6 months, the lowest prices add up to about £618 for Wegovy and £1,044 for Mounjaro.
What is a cheap alternative to Mounjaro?
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Wegovy is the main lower cost option. It costs less per pen at every stage. People lose a bit less weight on it than on Mounjaro, so ask your prescriber which suits you.
Is Ozempic cheaper than Mounjaro?
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Ozempic is licensed for type 2 diabetes, not weight loss. For weight loss, the same medicine is sold as Wegovy, which costs less than Mounjaro.
