Mounjaro 2.5 mg KwikPen solution for injection in pre-filled pen
Mounjaro 2.5 mg KwikPen solution for injection in pre-filled pen
Mounjaro 2.5 mg/dose KwikPen is a multi-dose pre-filled injection pen manufactured and marketed by Eli Lilly. The 2.5 mg strength is the starter dose. Each pen delivers four once-weekly subcutaneous doses of 2.5 mg tirzepatide in 0.6 mL solution.
UK retail price
£179.00
Verified today.
Estimated landed cost
£29.00
Modelled manufacturing and landed-cost estimate.
Price comparison
Retail vs estimated landed cost
Cost share
16%
of retail price
Retail multiple
6.2×
Retail price divided by estimated landed cost.
Difference
£150.00
Not profit. Other costs sit between landed cost and retail.
Confidence
69%
Evidence and modelling confidence.
Last analysed
today
Retail price checked today.
Price history
UK retail price trend
Verified retail-price checks recorded by TrueCost over time.
Last checked today
Latest
£179.00
Lowest recorded
£179.00
Highest recorded
£179.00
View individual price checks
1 recorded price checks
↓
View individual price checks
1 recorded price checks
Boots Online Doctor – Mounjaro prescription and orders
Cost model
What makes up the estimated cost?
TrueCost models the major components, manufacturing, assembly, packaging and landed costs required to produce the product.
Tirzepatide active pharmaceutical ingredient
Active ingredientThe pen contains 10 mg of tirzepatide plus manufacturing overfill. Tirzepatide is a complex synthetic peptide rather than a low-cost small-molecule API, so the estimate allows for peptide synthesis, purification, yield loss, analytical testing and pharmaceutical-scale production. Public data do not disclose Lilly's internal API cost.
£12.00
41.4%
Excipients and formulation materials
Raw materialsIncludes water for injection, phosphate buffer, sodium chloride, phenol, benzyl alcohol, glycerol and pH-adjustment chemicals. The quantities per pen are small, so the material cost is low relative to the active ingredient.
£0.15
0.5%
Cartridge and primary container components
Physical componentsAllowance for the glass or polymer cartridge, stopper, seals and associated primary-container materials holding approximately 2.4 mL of solution plus excess volume.
£1.20
4.1%
Disposable KwikPen mechanical device
Physical componentsCovers the pen body, cartridge holder, cap, cap clip, dose mechanism, dose window or indicator, dose knob, plunger components and internal seals. The device has no electronics, but requires precision-moulded and assembled components.
£4.80
16.6%
Sterile formulation, filling and device assembly
Manufacturing processIncludes solution preparation, sterile filtration or aseptic processing, filling into cartridges, pen assembly, in-process controls and allowance for normal production losses. Sterile fill-finish costs are material even when the liquid volume is small.
£4.50
15.5%
Primary and secondary packaging
PackagingIncludes label, folding carton, leaflet, tamper or identification materials and packing operations. Needles are excluded because the research pack states they are not supplied with the pen.
£1.30
4.5%
Quality control, batch release and regulatory production testing
Quality operationsAllocated cost for analytical testing of the API and finished product, sterility or microbiological controls, device-function checks, stability-related release work and batch documentation.
£2.50
8.6%
Direct factory overhead
Factory overheadAllocation for cleanroom operation, equipment depreciation, utilities, maintenance, production supervision and directly attributable manufacturing support.
£1.80
6.2%
Freight and temperature-controlled logistics to the UK
LogisticsAssumes European production or batch release and consolidated shipment to the UK. The medicine requires refrigerated storage before use, but per-unit freight cost can be modest when shipped in volume.
£0.60
2.1%
Import clearance and duty allowance
Import costsSmall allowance for customs handling, documentation and potentially applicable import charges. The actual duty treatment depends on origin, tariff classification and the specific supply route; this estimate does not assume a substantial tariff.
£0.15
0.5%
More detail
Explore the analysis
Open any section below to see more about the evidence, methodology and assumptions behind this estimate.
Estimated cost range
£18.00 – £45.00
↓
Estimated cost range
£18.00 – £45.00
The central TrueCost estimate is a modelled value. The plausible range reflects uncertainty in component pricing, manufacturing, assembly, freight and other landed-cost assumptions.
Analysis freshness
Fresh · Full analysis today
↓
Analysis freshness
Fresh · Full analysis today
7 Sept 2026 · today
7 Sept 2026 · today
Retail prices are rechecked after 30 days when the product is requested. The full manufacturing and landed-cost analysis is refreshed after 180 days.
Evidence quality
7 research sources · 69% confidence
↓
Evidence quality
7 research sources · 69% confidence
Research sources
7 sources used
↓
Research sources
7 sources used
Lilly UK – Current medicines
Lists Mounjaro among Lilly UK medicines and links the product to Eli Lilly’s UK information resources.
Mounjaro KwikPen 10mg solution for injection in pre-filled pen – UK Summary of Product Characteristics
The UK SmPC covers the 2.5 mg KwikPen presentation and specifies 2.5 mg per 0.6 mL dose, four doses per pen, 2.4 mL total volume, excipients, storage, pack sizes, needles not included and UK marketing authorisation details.
Mounjaro – European Medicines Agency product information
Lists the multi-dose KwikPen presentation and identifies Eli Lilly facilities and Millmount Healthcare facilities in Italy, France, Spain and Ireland in the manufacturer/batch-release information.
What excipients does the Mounjaro KwikPen contain? – Lilly Medical UK
Provides the per-dose quantities and purposes of the inactive ingredients, including buffer, tonicity agents, preservatives, vehicle and pH adjusters.
Boots Online Doctor – Mounjaro prescription and orders
Lists Mounjaro 2.5 mg, one pen, at £179. The page also confirms the UK product contains tirzepatide.
NHS Business Services Authority – Mounjaro price increase and Drug Tariff redetermination
Records the 2.5 mg Mounjaro KwikPen reimbursement price as £133 from September 2025, useful as a regulated UK price benchmark but not a private retail price.
Introducing the Mounjaro Pen – Lilly UK patient booklet
Illustrates and names the pen cap, cap clip, cartridge, cartridge holder, pen body, dose indicator, plunger, label, dose window, dose knob and red inner seal; it also states that needles are not included.
Model assumptions
6 assumptions
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Model assumptions
6 assumptions
- The unit contains 10 mg total tirzepatide in 2.4 mL of solution, plus normal manufacturing overfill or priming excess.
- The pen is manufactured or batch-released in Europe and supplied to the UK, with shipment cost allocated across a pallet or consolidated pharmaceutical shipment.
- The pen is a disposable multi-dose device with no electronic components and no needles included.
- Tirzepatide API cost is estimated from commercial synthetic-peptide pharmaceutical manufacturing economics; the actual internal transfer price is not publicly disclosed.
- The range reflects uncertainty in API pricing, sterile manufacturing yields, quality-control requirements, device procurement costs, cold-chain logistics and country-specific manufacturing arrangements.
- The estimate is for one pen, not a three-pen pack, and excludes any patient-service or dispensing costs.