Mounjaro vs Wegovy Cost Per Month in the UK, Compared

Mounjaro vs Wegovy cost per month in the UK is the question that decides many people's choice, because both jabs work but neither is cheap, and you may be paying for a year or more. The short answer: Wegovy usually costs less per month at the starter dose, while Mounjaro costs more but tends to deliver more weight loss per pound. Here is the honest breakdown, with real prices checked on 24 August 2026.

Mounjaro vs Wegovy cost per month: the headline numbers

Both medicines are priced per four weeks (roughly a month) as a private prescription. The cost climbs as you titrate up through the doses, so your monthly bill in month one is not what you will pay at your maintenance dose.

Across the providers we track, Wegovy's cheapest starter dose (0.25 mg) is £79.99 for four weeks, and Mounjaro's cheapest starter (2.5 mg) is £131. That is a meaningful gap early on. But because Mounjaro often produces more weight loss, the "cost per percentage point lost" can be closer than the sticker prices suggest.

Why the monthly cost differs

Wegovy (semaglutide) has been on the UK weight-loss market longer and has more competing supply, which tends to push prices down. Mounjaro (tirzepatide) is the newer, dual-action medicine and generally sits at a higher price band across every dose.

There is also a titration effect. Both start low and increase in steps — Mounjaro from 2.5 mg up to a maximum of 15 mg; Wegovy from 0.25 mg up to 2.4 mg. Higher doses cost more, so your monthly spend rises over the first few months before settling at your maintenance dose.

Cost per month by dose: real UK prices

Below is a like-for-like snapshot at a spread of GPhC-registered and CQC-regulated providers, using ongoing (post-promo) monthly prices for the starter doses. First-month promotional prices, where offered, are shown in brackets.

The spread is wide: across all tracked pharmacies, Mounjaro's starter dose ranges from £131 to £220 a month, and Wegovy's from £79.99 to £164 — for the identical pen. Prices are set by each pharmacy and change often, so always confirm on the provider's own site before ordering. For the complete league table across every dose, see the homepage price table.

What you'll actually pay as doses climb

Because most people move up to a treatment dose, the maintenance-dose price matters more than the starter. On Mounjaro, a typical maintenance dose of 10 mg ranges from about £229 to £324 a month depending on provider; the top 15 mg dose runs roughly £266–£359. On Wegovy, the 2.4 mg maintenance dose is generally cheaper than Mounjaro's higher doses.

So the honest picture is: Wegovy tends to keep a lower monthly cost across the whole journey, while Mounjaro asks more each month but, on the trial evidence, gives more weight loss for it. Which represents better value depends on how you weigh results against budget — we work through that in Mounjaro or Wegovy for weight loss.

How to keep the monthly cost down

A few practical levers genuinely reduce what you pay:

• First-month discounts. Many providers cut the first box — useful for testing tolerance before committing.
• Discount codes. Legitimate GPhC-registered pharmacies often list codes openly. Our recommended provider offers £35 off your first order with code NEWME.
• Don't chase the very cheapest blindly. Check the provider is GPhC-registered or CQC-regulated, and that support (dose reviews, messaging) is included.
• Avoid unregulated sellers. Never buy from social media or "compounded" sources — they are not legal, licensed supply and carry real safety risks.

Our recommended provider, The Weight Clinic, prices Mounjaro from £160 a month (£125 first month) and Wegovy from £115 a month (£80 first month), with monthly video reviews and a refund if the prescriber declines you — a fair way to try either without gambling a full month's cost up front.

Cost isn't the only factor

Both medicines are prescription-only, and a prescriber decides which suits you based on your BMI, health history and goals. Private eligibility typically starts at a BMI of 30+, or 27+ with a weight-related condition. Side-effect profiles overlap heavily — nausea, diarrhoea, constipation and vomiting are common on both — and any suspected side effect should be reported through the MHRA Yellow Card scheme.

If you're already on one and thinking about the other for cost reasons, read our practical guide to switching from Wegovy to Mounjaro before making any change, and see the wider picture in our full UK comparison. This article is price and information only, not medical advice.

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