Mounjaro (tirzepatide) prices in the UK have fallen dramatically since the drug's launch in late 2023. What started at £249/month for the 2.5mg starting dose has dropped to as low as £139/month from the most competitive pharmacies. But will prices keep falling in 2026, or have we hit the floor?
- Increased competition: the number of GPhC-registered pharmacies offering Mounjaro has grown from ~15 at launch to 60+ by early 2026
- Improved supply chains: early supply constraints from Eli Lilly have eased significantly
- Prescriber network growth: more independent prescribers means lower consultation fees
- Market maturity: pharmacies are competing on price as the market commoditises
- Discount code proliferation: first-order discounts have become a standard acquisition tool
| Period | Cheapest 2.5mg | Cheapest 10mg | # Pharmacies |
|---|---|---|---|
| Q4 2023 (launch) | ~£249 | ~£329 | ~15 |
| Q2 2024 | ~£219 | ~£289 | ~25 |
| Q4 2024 | ~£179 | ~£239 | ~40 |
| Q2 2025 | ~£159 | ~£209 | ~55 |
| Q1 2026 (current) | ~£139 | ~£189 | 63+ |
The most likely scenario is continued gradual price erosion of 5–10% per quarter as the market matures. We forecast the cheapest 2.5mg dose reaching £119–£129/month by Q4 2026, with the 10mg dose dropping to £169–£179/month.
Pharmacies have fixed costs (consultation, dispensing, cold chain logistics) that create a natural price floor. If margins compress further, some pharmacies may exit the market or consolidate, stabilising prices around current levels.
Tirzepatide's patent protection means biosimilar competition is unlikely before 2027–2028 at the earliest. When biosimilars do arrive, prices could fall dramatically — as seen with insulin and other biologics. This is a longer-term price catalyst.
- Use our price comparison table to find the cheapest pharmacy for your specific dose
- Apply a discount code on your first order — most pharmacies offer 10–30% off for new patients
- Consider a 3-month supply if your pharmacy offers bulk discounts
- Sign up for our price alert emails to be notified when prices drop at your preferred pharmacy
Prices are most competitive at the 2.5mg and 5mg doses. If you're starting treatment, now is a good time — the market is more competitive than it has ever been.