How Much Do Weight Loss Injections Cost in the UK? (November 2026)

01 · What it costs

Weight loss injection prices with us

Prices are live, checked 10 November 2026, and include the consultation, prescriber review, free next-day tracked delivery, needles and a sharps bin. New customers get £40 off with code FIRST40, repeat orders are £25 off, and Subscribe & Save takes £40 off every order on injections. Start with Mounjaro or Wegovy.

Mounjaro and Wegovy are prescription-only medicines, 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.

02 · Cost over the first months

What weight loss injections cost over the first months

Both injections start at a low dose and step up, and each step is a pricier pen. For Mounjaro, the dose rises from 2.5mg to 5mg after at least 4 weeks, then can step up by 2.5mg at intervals of at least 4 weeks.¹ If you step up every four weeks, your first four Mounjaro pens (2.5mg to 10mg) cost £879.96 with us at standard prices. For Wegovy, the dose steps up every 4 weeks to reach 2.4mg from week 17.²

Over a first year, Mounjaro costs £2,399.88 with us if you stay on 5mg after the starting pen, up to £3,279.88 if you step up through every dose to 15mg, at standard prices before discounts.

03 · Cost per week

Weight loss injection cost per week

Because each pen covers four weekly doses, the weekly cost of Mounjaro with us works out as follows at standard prices:

Repeat discounts and Subscribe & Save bring the weekly cost down further. See Mounjaro prices by dose for the full breakdown.

04 · What is included

What the price includes

When you compare providers, check what the headline price covers. With us, every pen price includes:

• The online consultation and review by a GPhC-registered prescriber, with no consultation fee.
• Free next-day tracked, temperature-controlled delivery.
• Needles and a sharps bin.
• An automatic full refund if the prescriber decides treatment is not suitable for you.

Some providers charge separately for consultations, delivery or needles, which can make a lower headline price cost more overall.

05 · Private vs NHS

Private or NHS: which costs less?

The NHS is cheaper if you qualify, but the criteria are tighter and waiting times can be long while the rollout is phased in.³ Privately, Mounjaro and Wegovy are licensed for adults with a BMI of 30 or above, or 27 to under 30 with at least one weight-related condition, so more people are eligible, but you pay the full cost of each pen. Our eligibility guide explains both routes.

06 · Comparing prices

Weight loss injection price comparison

Prices vary between 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. Compare the same dose, check whether a price is a first-order offer, and add any consultation or delivery charges. See our Mounjaro price comparison and Wegovy price comparison.

07 · Value for money

Cost versus results

Mounjaro costs more than Wegovy but gave more weight loss on average: in SURMOUNT-5, tirzepatide gave 20.2% average weight loss over 72 weeks versus 13.7% for semaglutide 2.4mg.⁴ Some people pay more for the larger average loss; others choose Wegovy to keep costs down. Our Mounjaro vs Wegovy page weighs this up.

08 · NHS costs

How much are weight loss injections on the NHS?

If you are prescribed them on the NHS, you pay the standard prescription charge in England, and prescriptions are free in Scotland, Wales and Northern Ireland. NICE recommends Mounjaro for adults with a BMI of at least 35 plus at least one weight-related condition, and the rollout is being phased in over several years, starting with the highest-need groups.⁵³

09 · Keeping costs down

How to keep the cost of injections down

• Use the repeat discount or Subscribe & Save every month after your first order.
• Buy bundles once you are settled on a dose.
• Spread the cost with Klarna or Clearpay if it helps.
• Do not step up for the sake of it; many people do well on a lower dose.

Never buy cheap pens from unregistered sellers. The MHRA has seized thousands of fake weight-loss pens in the UK.⁶