Wegovy pack size: what does each pen actually contain?

What exactly is inside a Wegovy box?

Open a Wegovy box and you'll find a single pre-filled pen, a Patient Information Leaflet, and, depending on the strength, a set of NovoFine needle tips. The pen itself is pre-set: the dose is already dialled in at manufacture for that specific strength. There's no cartridge to load and no dose to measure. You attach a needle, prime it once (the first time you use a pen), inject into the abdomen, thigh or upper arm, and dispose of the needle safely afterwards.

The pen holds enough semaglutide for exactly four doses at the labelled strength. Use it once a week on the same day each week, and one box carries you through a full four weeks. If you're unsure about injection technique, the semaglutide overview page covers the practicalities in plain terms, and the Patient Information Leaflet walks through each step in detail.

One thing people sometimes assume: that the pen can be shared or split between two people on different doses. It can't, and it shouldn't. The pen is designed for single-patient use, calibrated to one strength, and sharing prescription medicines carries real clinical risk on top of being unlawful.

Which pack size and dose strength will a prescriber start you on?

The prescribing pathway for Wegovy begins at 0.25 mg, regardless of your starting weight. That low starting dose isn't a therapeutic shortfall, it's there to let your body adjust to semaglutide before the dose is increased. Most people find the early weeks manageable; nausea and similar effects, if they appear at all, tend to be at their most noticeable at the beginning or after each step up.

From 0.25 mg, the schedule typically moves in approximately four-week steps: 0.25 mg, then 0.5 mg, 1.0 mg, 1.7 mg, and finally the standard 2.4 mg maintenance dose. Since January 2026, a 7.2 mg dose is also licensed in the UK, the MHRA approved a dedicated single-dose 7.2 mg pen in April 2026, designed for adults with a BMI of 30 or above, with titration still beginning at 0.25 mg and rising through the usual steps under prescriber guidance. If you want to understand how Wegovy's sizing works across each strength, that page goes into more detail on how those steps work in practice.

A prescriber decides which pack you receive at each stage. Evidence of your current dose and treatment progress is reviewed before any step up, at nume, that review happens every time you order a repeat, not as a formality but as a genuine clinical check.

How does the pack size affect what you pay?

Because each box is a four-week supply, the cost you'll see from any private provider is typically quoted per pen or per month, they're the same thing. The pack size itself is fixed (one pen, four doses), so what changes across providers is the clinical infrastructure wrapped around it: whether a prescription fee is charged separately, whether delivery is included, whether aftercare is accessible once the box arrives.

Eli Lilly raised Mounjaro's UK list price significantly from September 2025, and Novo Nordisk's pricing has followed similar market movement. Reported private prices for Wegovy across UK providers currently range roughly £149 to £375 per month depending on the dose strength and provider. For more context on what drives those figures and what a legitimate price should include, the Wegovy cost guide covers the landscape honestly.

At nume, one price covers the consultation, prescription, the medicine itself, and free next-working-day tracked delivery. No separate prescription charge, no delivery fee on top. Current pricing is shown on the treatment page.

Does pack size change if you buy the starter pack?

Some providers label their lowest-dose pens as a "starter pack". The physical contents are the same (one pen, four doses, at 0.25 mg) but the framing is designed to signal that this is the right point of entry. It's accurate as far as it goes. The clinical guidance from the NHS semaglutide information page is clear that treatment begins at the lowest dose and increases gradually under prescriber direction; nobody should be jumping straight to a maintenance dose because a lower one seems less worthwhile.

If you've seen the phrase Wegovy starter pack while researching, it simply refers to that first 0.25 mg pen, and if you're also trying to work out how semaglutide sizing is structured across the different pens and strengths, that page explains the full picture clearly. There's nothing structurally different about the packaging, the same box format applies at every dose level. What matters is that the dose on the label matches the dose your prescriber has authorised for you at that point in your treatment.

We hear this question fairly often, usually from people who've been on Wegovy with a previous provider and are trying to transfer at a higher dose. That's absolutely possible through a regulated pharmacy, but it requires evidence of your current dose, not least because receiving a maintenance-dose pen without the right clinical background behind it would be clinically inappropriate. It's worth knowing before you start looking around. NICE's recommendation for semaglutide, set out in NICE technology appraisal TA875, situates this within a broader framework of ongoing clinical oversight for good reason.