Why Are They Increasing the Price of Mounjaro? (October 2026)

01 · The reasons

Why Lilly increased the UK price of Mounjaro

Lilly raised the UK list price as part of an agreement announced on 14 August 2025, with the new prices effective 1 September 2025.¹⁰

Several factors sit behind it, as set out in public reporting and Lilly's statement:

• Price alignment. The UK launch price was set well below European and US levels to speed early access. Lilly describes the move as bringing UK pricing closer to other developed countries.
• US policy pressure. The increase followed pressure from the US administration for drugmakers to charge more outside the US.
• Cross-border supply. Lower UK prices made it attractive to buy in Britain and sell elsewhere, which is another reason cited for the change.

02 · What you pay

What the increase means for what you pay

The list price is what Lilly charges pharmacies; the price you pay is set by the pharmacy. Sell prices vary because of confidential discounts, so the headline rise does not map neatly onto a pharmacy's shelf price.

Our standard price for the Mounjaro pen is £169.99 per month at 2.5mg, rising to £329.99 at 15mg, all six doses in stock. New customers save £40 on their first order at any dose with code FIRST40, and an automatic £25 reorder discount applies to every future order (code DOSE25). See the Mounjaro discount code page for details.

03 · Planning

Planning your costs after the rise

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 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. A new customer's first order is £40 less and every later order £25 less.

Curious about the wider story? See why Mounjaro's price is increasing at UK pharmacies and whether Mounjaro is doubling in price.

04 · Cutting cost safely

Ways to manage cost safely

Each KwikPen is designed and licensed to deliver exactly four weekly doses. Use the pen as designed, then dispose of it.

Our guide to increasing your Mounjaro dose explains how dose changes are planned, and some readers look at fixed-price Mounjaro options for budgeting.

05 · Beware cheap fakes

Price rises and counterfeit risk

Higher prices make fake pens more tempting. The MHRA has seized thousands of fake weight-loss pens in the UK and has 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.¹²

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 is cloudy, discoloured, has particles, is past expiry, has been frozen, or has been above 30°C. Once in use, a pen can be kept out of the fridge at not above 30°C for up to 30 days, and must then be thrown away.¹³ We are supplied through official LillyDirect supply, with genuine KwikPens. The Mounjaro trade price page explains more about how supply pricing works.

06 · Is it still worth it

Is Mounjaro still worth considering?

That is your decision with a prescriber. In SURMOUNT-1 (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. These are trial averages and individual results vary.² For someone starting at 100 kg, 20.9% is about 21 kg.

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.¹

NHS route

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 at least one weight-related condition, and the primary-care rollout began in June 2025 with the highest-need groups first.⁴⁶ Many people who meet the licensed criteria choose regulated private treatment rather than wait.

How ordering works

• Complete a free online consultation, with no obligation.
• Payment is taken when you place the order; if the prescriber decides the treatment is not suitable, the order is refunded automatically in full.
• We dispense and dispatch (same day if ordered by 3pm) with free next-day tracked delivery.

Start your free consultation or browse all weight loss treatments.

Mounjaro (tirzepatide) is a prescription-only medicine, supplied only after an online consultation reviewed by a GPhC-registered prescriber. Individual results vary. This page is information, not a substitute for medical advice.