What does tirzepatide 5mg cost in the UK?

Step 1: understand what's driving the 5mg price point

The 5mg pen is the second step in tirzepatide's titration schedule. Treatment starts at 2.5mg (a dose designed to let your body adjust rather than to deliver the full therapeutic effect) and many people move to 5mg after the first four weeks, subject to their prescriber's review. That matters for cost planning because you'll spend at least a month at each level before a dose increase is considered, so it's worth understanding the tirzepatide 2.5mg cost before factoring in what you'll pay at the next step.

Eli Lilly raised Mounjaro's UK list price significantly from September 2025, with the highest-dose pen rising from around £122 to around £330 in list-price terms, as widely reported at the time. Private prices since then have ranged roughly £149–£375 per month across the dose range and between providers. The 5mg pen sits within that range; for dose-by-dose context, the full tirzepatide cost overview covers where 5mg sits relative to other doses. These are market figures (hedged, not guarantees) and your quoted price should reflect the complete cost, not just the medicine itself.

NICE's appraisal of tirzepatide (TA1026) confirmed it as clinically recommended for eligible adults, which has shaped private providers' confidence in offering it, and, frankly, has supported pricing at this level.

Step 2: identify what a quoted price actually includes

A price comparison for tirzepatide is only useful if you're comparing the same things. Some providers quote the pen price alone. Others charge separately for the consultation, the prescription, delivery, and any follow-up clinical support. By the time those are added, a low headline number can look quite different.

The questions worth asking before you pay: Is the consultation free, or is there a fee even if treatment isn't prescribed? Does the prescription cost extra? What happens if you need to contact someone between doses, is aftercare included or billed separately? Is delivery free, and how fast? For a medicine that requires ongoing clinical oversight, those answers matter as much as the per-pen figure, and they're all relevant when you're comparing tirzepatide 5mg prices across providers. The Mounjaro price guide unpacks the typical cost components across the private market.

At the other end of the dose range, it's also worth knowing what you're likely budgeting toward, the tirzepatide 15mg cost page covers what the highest maintenance dose typically looks like.

Step 3: apply the right yardstick, it isn't cheapest

Here's the honest version: a small saving on the pen price answers the wrong question for a prescription medicine. The MHRA has warned publicly about counterfeit weight-loss pens sold through social media and unverified online sellers, some containing insulin rather than tirzepatide, with hospitalisations reported. By 2025, enforcement operations had seized roughly 20 million doses of illegally traded weight-loss medicines with a street value of around £45 million, and the first UK site producing fake tirzepatide pens was raided in Northampton. The safest way to check any online pharmacy is to look up its registration on the GPhC register, every legitimate UK pharmacy has a verifiable premises number.

Red flags worth knowing: sellers offering tirzepatide without a prescription, prices far below the market range, and discount codes from sources you can't verify. Legitimate supply of a prescription-only medicine always involves a prescriber making a clinical decision about you specifically.

At nume, we're not the cheapest option, that's deliberate. One price covers the consultation, prescription, treatment, delivery and aftercare. Nothing billed separately, nothing recurring unless you choose to reorder. Our clinical team reviews every consultation and every repeat request personally. If you'd like to explore what's included or check whether tirzepatide is clinically suitable for you, the free consultation is the place to start, no commitment, just a proper clinical assessment. The weight-loss treatment overview is also a good starting point if you're still weighing your options.