First Order Costs: What You Actually Pay
The number on the advert is rarely the number on your card statement. This guide breaks down every component of a first order for Mounjaro or Wegovy in the UK — the pen, the consultation, the needles, the sharps bin and the postage — so you know the real figure before you reach the checkout.
A first order of a prescription weight loss injection is not a single purchase. It is a medicine, a clinical assessment and a small bundle of consumables, and different pharmacies package those three things differently. One provider folds everything into a single price. Another advertises a low medicine price and then adds the consultation, the needles and the postage at checkout. Both are lawful. Only one of them is easy to compare.
In August 2026, a first month of Mounjaro at the 2.5 mg starting dose typically sits somewhere between £100 and £150 across GPhC-registered pharmacies, with some high-street and app-based providers charging above £200 for the identical pen. Wegovy at 0.25 mg generally runs lower, from around £49 on a first-order promotion to roughly £120 at standard rates. Those are the medicine prices alone. What you actually pay depends on what else the provider bundles in.
This page explains what makes up a first order, why the first month is the cheapest month you will have, and how to read a headline price properly.
Your first order is always the lowest dose.
Both medicines are titrated, meaning the dose is stepped up gradually rather than started at full strength. Mounjaro begins at 2.5 mg once weekly and Wegovy at 0.25 mg once weekly, each held for around four weeks before any increase. This is a safety protocol, not an upsell: starting low gives your body time to adjust and reduces the nausea and digestive side effects that are most common in the first weeks.
The financial consequence matters. Starting doses are the cheapest strengths a pharmacy sells, so your first invoice is the smallest one you are likely to see. Budget against the dose you expect to settle on, not the one you start on. No prescriber can tell you in advance exactly where that will be.
1. The medication
One pre-filled pen, which holds four weekly doses — a full month at your starting strength. This is the line item pharmacies advertise, and it is the only one that is genuinely comparable between providers, because the pen itself is identical.
2. The consultation
A clinical assessment by a registered prescriber is mandatory and cannot be skipped. Most providers include it free on a first order; a minority charge £20 to £50 separately, and some also bill a prescription writing fee.
3. Equipment and delivery
Pen needles, a sharps bin for safe disposal, and tracked postage. Each is small on its own — commonly £3 to £6 — but together they can add £10 to £15 to an order that looked complete on the product page.
Why headline prices can be misleading
A headline price is a marketing figure. It is chosen to be the lowest number a provider can defensibly print, which usually means the cheapest dose, on a first-order promotion, with everything optional stripped out. That is not dishonest, but it does mean two advertised prices are almost never measuring the same thing.
Three things most often separate the advert from the invoice. The first is unbundling: needles, sharps bins and postage listed as add-ons rather than included. The second is a delivery threshold, where free postage applies only above a spend your starter order does not reach. The third is a promotional price that applies to the first month alone, so month two arrives at a rate you never saw during comparison.
The worked example below shows how a £119 advert becomes a £132.44 payment. The figures are illustrative and not taken from any single pharmacy, but the shape of the gap is typical.
| Item | Shown in the advert | Charged at checkout |
|---|---|---|
| Starter pen (Mounjaro 2.5 mg, one month) | £119.00 | £119.00 |
| Online consultation and prescription | Included | £0.00 |
| Pen needles (four) | Not shown | £4.99 |
| Sharps bin | Not shown | £3.50 |
| Tracked delivery | “Free delivery”* | £4.95 |
| First order total | £119.00 | £132.44 |
*Free delivery applied above a £150 spend, which a single starter pen does not reach. Illustrative worked example, August 2026.
Check what happens in month two.
A large first-order discount tells you very little about the cost of treatment. If you step up from 2.5 mg to 5 mg after four weeks and the introductory rate has also expired, your second invoice can be substantially higher than your first. Before you order, find the standard price of the dose above your starting one. If a provider does not publish it, treat that as a reason to look elsewhere.
What to check before you pay
Take the order through to the final payment screen before committing. Every fee has to be disclosed there, whatever the product page said. Then work through this list:
- Is the pharmacy registered with the General Pharmaceutical Council, and is the registration number shown on the site?
- Is the consultation included, or charged separately? Is there a separate prescription fee on top?
- Are needles and a sharps bin included, and how many needles are supplied?
- What does delivery cost for a single-pen order, and is any free-postage threshold above that amount?
- Is the price a first-order promotion? What is the standard price afterwards?
- What does the next dose up cost, and when would you move to it?
- Is this a one-off purchase or does ordering enrol you in a recurring subscription, and how is it cancelled?
One point is worth stating plainly: price should not be the deciding factor on its own. A pharmacy that assesses you properly, answers questions between orders and handles a dose increase carefully is worth more than a £15 saving. Any provider willing to supply without a genuine clinical assessment should be avoided regardless of price.
Next steps
First order costs are one part of the picture. Repeat costs, consultation fees, delivery charges, subscription terms and promotional pricing each behave differently over a full course of treatment, and we cover them separately.
- Understanding treatment costs — the full cost hub, including repeat and subscription charges.
- Compare prices from UK pharmacies — current prices from regulated providers, including the fees that sit beneath the headline.
Disclaimer: PenCompare is an independent comparison platform. This guide is for informational purposes and does not replace professional medical advice.
Prices were checked in August 2026 and change frequently. Always confirm the current total at the provider’s checkout before paying. Whether a treatment is suitable for you is a decision for a registered prescriber.