How much does Mounjaro cost per week on a private prescription?

Step 1: understand how Mounjaro is priced in the UK

Mounjaro comes as a pre-filled KwikPen, each containing four weekly doses. Private providers price it per pen, which equates to roughly one month of treatment at a fixed dose. Because there are six licensed strengths (2.5mg through to 15mg), the monthly figure varies considerably across the titration schedule.

Since Eli Lilly raised its UK list price in September 2025, market rates for private prescriptions have shifted upward. Reported private prices now range broadly from around £149 to around £375 per four-week pen depending on dose and provider, figures that have been widely discussed in the UK press and are consistent with Lilly's revised list pricing. The 15mg pen's list price rose from approximately £122 to around £330 at that point. Any specific price you're quoted will sit somewhere in that band, though the exact figure depends on your current dose and which service you use.

One practical note: treatment begins at 2.5mg, a tolerability dose whose job is to let your body settle before therapeutic titration starts. The pen you carry in month one costs less than the pen you'll likely be taking at month six. If you want to understand how much tirzepatide you take per week at each stage of the schedule, that can help you plan your budget across the full titration rather than fixating on the starting price. People also find it useful to read about how much weight loss tirzepatide tends to deliver per week, since understanding the likely return helps put the ongoing cost into perspective. For a fuller breakdown of how Mounjaro pricing works at each strength, the Mounjaro price guide on this site walks through the landscape in detail.

Step 2: look at what headline prices usually leave out

A low advertised figure is often just the medicine. When you add what's missing, the picture changes. Common extras that not every provider includes:

Consultation and prescription fees. A legitimate supply of Mounjaro requires a prescriber to assess your medical history, current medicines, BMI and any relevant conditions, as required for any prescription-only medicine. Some services charge separately for this; others fold it in.

Delivery. Next-day tracked courier services for temperature-sensitive medicines are not free to run. A provider quoting a medicine-only price frequently adds this at checkout.

Aftercare access. Questions come up between doses. Dose increases require clinical sign-off. Repeat orders need re-review. Whether that support is available seven days a week, and whether it carries a fee, is worth establishing before you commit to a service.

Dose-increase evidence checks. A regulated provider should ask for evidence (confirmed weight data, for example) before authorising a higher dose. That clinical layer has a cost, even when it isn't itemised.

The Mounjaro overview page covers the clinical background to treatment, including the titration schedule, in plain terms.

Step 3: what nume's single price includes

At nume, we are deliberately not the cheapest option in the market. That's a choice, not an oversight. One transparent price covers the consultation, the prescription, the medicine, and next-working-day DPD delivery. Priority aftercare runs seven days a week. Nothing is added at checkout; nothing recurs automatically. Every repeat order is clinically re-reviewed before it ships, there is no subscription that rolls forward without anyone looking at your case.

Your consultation is reviewed the same day by a real, named prescriber on the GPhC register, not a form that feeds an algorithm. If you order before 12pm on a working day and your prescription is approved, your pen leaves our GPhC-registered pharmacy the same day. It arrives the next working day in plain packaging, tracked on your phone through DPD. Tuck it in the fridge door when it arrives and it's ready for your injection day without any fuss.

You can verify our pharmacy on the GPhC register (registration number 9012878) at pharmacyregulation.org. Current treatment pricing is shown on the treatment page. Our about us page explains the clinical team behind the service, including our lead prescriber.

Step 4: why 'cheapest' is the wrong test for a prescription medicine

Mounjaro is a Prescription-Only Medicine. UK law exists precisely to ensure it reaches patients through a clinical pathway that keeps them safe. The MHRA has warned publicly about counterfeit weight-loss pens circulating online, some containing insulin rather than tirzepatide. In 2025, around 20 million doses of illegally traded weight-loss medicines (approximately £45m street value) were seized, and the first UK site manufacturing fake tirzepatide pens was raided.

A price far below the market rate is a red flag, not a bargain. Sellers offering these medicines without a prescription, via social media, or with discount codes attached to the medicine itself are operating outside UK law. The MHRA Yellow Card scheme accepts reports of suspect sellers directly from members of the public.

For a prescription medicine, the right question isn't which provider charges least, it's which provider is genuinely regulated, clinically rigorous, and supplies from the licensed UK chain. Those properties have a floor price that discount codes don't change.

Curious about what Mounjaro can realistically achieve? Many people want to know how much weight loss to expect in week 1 of Mounjaro, and looking at how much weight loss a week on Mounjaro is typical gives a broader picture, though if you want to dig into the numbers further, the data on how much you lose a week on Mounjaro offers an honest, evidence-based view from clinical trials. Or if you're ready to get started, check your eligibility and speak to our prescribers.