Fat Loss Injection Prices in the UK: What Is Cheapest? (October 2026)

01 · Price

What does a fat loss injection cost in the UK?

Private Mounjaro (tirzepatide) is the main fat loss injection people compare on price. Across the UK pharmacies we track, the cheapest and dearest pen at any dose are £143.96 and £339.00 per month, checked 11 October 2026. For the 2.5mg starting pen alone the range is £143.96 to £179.99.

Providers also differ from each other for the same dose, by £27 at the smallest gap and £41 at the largest. Boots' Mounjaro prices run from £179.00 to £339.00. Comparing the same dose is the only fair way to shop.

02 · Our prices

What do we charge at EverydayMeds?

Our Mounjaro pen costs £169.99 at the 2.5mg starting dose, standard price. New customers save £40 on their first order with code FIRST40. Every later order is £25 off the standard price, applied automatically (code DOSE25). The Mounjaro discount code page explains how both discounts work. The consultation is free and the price shown is the price paid.

03 · Planning

What will it cost over a year?

If you step up after 4 weeks on each dose, your first four pens (2.5mg to 10mg) cost £959.96 at standard prices. A first year of 13 pens costs £2,711.88 if you stay on 5mg after your 2.5mg starting pen, up to £3,599.88 if you step up through every dose to 15mg. Your first order is £40 less and every later order £25 less than those figures.

Many people settle at 5mg, 10mg or 15mg, and higher is not automatically better.¹ A maintenance dose in the middle of the range costs £279.99 (7.5mg) or £290.99 (10mg) per month at standard price.

04 · Ordering

How ordering works

Ordering takes three steps and starts with a free online consultation.

• Complete a short health questionnaire, free with no obligation.
• A GPhC-registered prescriber reviews it. Payment is taken when you place the order, and if the prescriber decides the treatment is not suitable, the order is refunded automatically in full.
• We dispense and dispatch, with same-day dispatch when ordered by 3pm and free next-day tracked delivery in temperature-controlled packaging.

All six doses are in stock. We supply through official LillyDirect, and you can pay by card, Klarna or pay-monthly options, with no subscription. Browse fat loss jabs online or see all weight loss treatments.

05 · Cheap does not mean safe

Why the cheapest price can be dangerous

The MHRA has seized thousands of fake weight-loss pens in the UK and issued alerts after falsified Mounjaro pens were identified. Fake pens have caused hospitalisations, and some contained insulin rather than tirzepatide.⁷

Only buy from a pharmacy you can verify on the GPhC register, never from social media, beauty salons or unverified websites. Genuine treatment always involves a prescription and a clinical consultation.⁷

A genuine pen has a batch number and expiry date, arrives cold-chain packaged, and the solution is clear and colourless. Do not use a pen that has been frozen, looks cloudy, has particles, or is past expiry.¹³

06 · Stretching pens

Storing and using your pen

Mounjaro is a once-weekly medicine, and each KwikPen contains four weekly doses.¹

Keep pens in the fridge and never freeze them. Once in use, a pen can be kept out of the fridge at a temperature not above 30°C for up to 30 days after first use, and must then be thrown away.¹³

07 · What you get for the money

What the treatment delivers

In the SURMOUNT-1 trial of 2,539 adults, people taking tirzepatide alongside diet and exercise lost on average 15% of body weight on 5mg, 19.5% on 10mg and 20.9% on 15mg over 72 weeks, versus 3.1% with lifestyle changes alone. Individual results vary.² For someone starting at 100 kg, 20.9% is about 21 kg.

Progress is gradual. The 2.5mg weeks are an adjustment phase, and most measurable progress builds from 5mg onward.¹ Read more on whether fat loss injections work, their side effects and whether they are safe.

Get medical help straight away for severe, persistent stomach pain that may spread to your back, pain in the upper right abdomen with fever or yellowing of the skin or eyes, or swelling of the face or throat with difficulty breathing.¹³

08 · NHS and eligibility

NHS access and who can get it privately

Mounjaro is available on the NHS, but access is being phased in over several years. NICE recommends it for adults with a BMI of at least 35 plus a weight-related condition, and the primary-care rollout began in June 2025 with the highest-need groups first.⁴ See our fat loss injections NHS guide.

Privately, Mounjaro is licensed for adults with a BMI of 30 or above, or 27 to 30 with a weight-related condition, alongside a reduced-calorie diet and more activity. A prescriber assesses suitability first.¹