Quick answer: in September 2025, Eli Lilly raised the UK list price of Mounjaro substantially — in some cases roughly doubling it — after pressure to align UK prices with other markets. Private pharmacy prices jumped as a result. The good news: pharmacies absorbed the rise unevenly, so comparing prices matters more now than ever.
What happened
Mounjaro (tirzepatide) launched in the UK at prices Eli Lilly later described as below other developed markets. In August 2025 the manufacturer announced a UK list-price increase effective 1 September 2025, citing the need for international price alignment. Reported list prices rose sharply across all six doses.
What it meant in practice
- Private prices rose — but not uniformly. Pharmacies buy through wholesalers and set their own margins, so the increase landed differently at different providers. Some absorbed part of it to stay competitive.
- Discount codes became more important. Providers leant harder on first-order and loyalty offers to keep customers, which is why the discount codes page can move the real price by double-digit percentages.
- Switching surged. Many patients changed pharmacy in autumn 2025. If you haven’t re-compared since the rise, you’re likely overpaying — check the live comparison.
Could prices fall again?
Possibly. Competition among UK online pharmacies is intense, new weight-loss medicines keep arriving, and manufacturers adjust pricing under commercial and political pressure. What we can say factually: the spread between the cheapest and most expensive legitimate pharmacy remains wide, and it shifts week to week. The live index figures tell the current story better than any prediction:
- Lowest new customer total shown: £99.00
- Lowest returning customer total shown: -
- Lowest monthly subscription total shown: -
- Lowest 3-month subscription monthly equivalent shown: -
- Lowest 6-month subscription monthly equivalent shown: -
What to do about it
- Re-compare now.
If your price memory predates September 2025, it’s out of date.
- Compare at your current dose.
The rise hit doses differently — check yours in the comparison.
- Stack the discounts.
Codes from the hub plus the cheapest base price is the real optimisation.
Background sources: Eli Lilly UK pricing announcement (August 2025); contemporaneous reporting by the BBC, Reuters and The Guardian. Prices quoted on this page are live index figures, not historical records.
Mango Market is an independent comparison service, not a pharmacy. Nothing here is medical advice — treatment decisions belong to you and a qualified prescriber. Editorial standards · Methodology.