Mounjaro KwikPen Price in the UK: Every Strength (November 2026)

01 · Prices

Mounjaro KwikPen prices by strength

Prices checked 10 November 2026. New customers get £40 off with code FIRST40, repeat orders are £25 off with DOSE25, and Subscribe & Save takes £40 off every order. Order from our Mounjaro page.

02 · How to order

How to order a KwikPen

Choose your dose, complete the free consultation, and if a GPhC-registered prescriber approves it, our pharmacy sends your pen with free next-day tracked, temperature-controlled delivery. Mounjaro (tirzepatide) is a prescription-only medicine, supplied only after an online consultation reviewed by a GPhC-registered prescriber. This page is information, not a substitute for medical advice.

03 · What one pen contains

What one Mounjaro KwikPen contains

Each KwikPen is designed and licensed to deliver exactly four weekly doses.¹ Each pen is a single strength, so moving to a new dose means a new pen. That is why the pen price is also the monthly cost of treatment.

Do not try to split doses, count clicks or "microdose" from a pen. The pen is not designed for it, and you cannot be sure how much medicine you are getting. If you need a slower increase, the prescriber can keep you on your current dose for longer.

04 · Which pen you start on

Which KwikPen will you need?

Everyone starts on 2.5mg once a week for at least 4 weeks. The dose then rises to 5mg, and can step up by 2.5mg at intervals of at least 4 weeks to a maximum of 15mg.¹ If you step up every four weeks, your first four pens (2.5mg to 10mg) cost £879.96 with us at standard prices. Many people stay on a lower dose for good. See the full Mounjaro dose schedule.

05 · Market prices

KwikPen prices across UK pharmacies

Across the UK pharmacies we track, Mounjaro pens range from £143.96 to £339.00 depending on dose, and the gap between providers for the same dose runs from £27 to £40.03, checked on 10 November 2026. Eli Lilly raised the UK list price of Mounjaro in September 2025, and pharmacy sell prices vary because of confidential discounts.² Our Mounjaro price comparison and price increase pages explain more.

06 · In the box

What comes with your pen

Every pen from us comes with needles and a sharps bin, sent tracked in temperature-controlled packaging. Use a new needle for each injection and put used needles straight into the sharps bin. Licensed injection sites are the stomach area (at least 5cm from the belly button), the front of the thigh, or the back of the upper arm if someone else gives the injection.³ See our guide to injection sites.

07 · Storage

How to store a KwikPen

Keep unused pens in the fridge at 2°C to 8°C. 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. Do not use a pen that has been above 30°C or has been frozen.³

08 · Saving on pens

Ways to pay less per pen

• Use FIRST40 on your first order and the repeat discount after that.
• Choose Subscribe & Save for £40 off every order.
• Buy a bundle once you are settled on a dose.
• Spread the cost with Klarna or Clearpay.

Never buy pens from social media or without a prescription. The MHRA has seized thousands of fake weight-loss pens in the UK and has issued alerts after falsified Mounjaro pens were identified.⁴