How many doses are in a Wegovy pen — and what that means in practice

You've just opened your first Wegovy box, here's what you're looking at

The box contains one pen. Inside that pen is enough semaglutide for four weekly injections, pre-loaded at a fixed dose. You press the pen against your skin, press the button, and the device delivers exactly the right amount, no measuring, no drawing up from a vial. If you want to confirm how many doses are in one Wegovy pen before you start, that page walks through the count and what each cap removal means in practice. Each dose is separated by a cap that you remove before use; the pen won't fire a second dose until the following week's cap is taken off.

Most people keep the pen in the fridge door between uses, which makes the weekly routine fairly straightforward, it's there when you need it, and you're not hunting for it. Storage is refrigerated at 2–8 °C; the patient information leaflet sets out the exact window if you ever need to keep it at room temperature, and that's the document to follow rather than any general guidance.

The full Wegovy dose schedule covers every strength in the titration ladder, but the four-doses-per-pen rule holds from the first 0.25 mg starter pen to the 2.4 mg maintenance pen. That's five strengths, all using the same format. What you receive at any given point depends on where you are in your treatment plan.

What changes with the 7.2 mg pen, and who it's for

The higher-strength option breaks the four-dose pattern. On 14 April 2026 the MHRA approved a dedicated single-dose 7.2 mg Wegovy pen, one pen delivers one injection, and that's its entire supply. You use a fresh pen each week at this strength.

That approval followed an earlier route to 7.2 mg (from January 2026) using three 2.4 mg pens per week, which was a temporary bridging arrangement. The single-dose pen replaced that with a cleaner, auto-dosing device: a covered needle that locks after use, designed so the full 7.2 mg is delivered in one injection rather than split across three.

It's worth being clear about who the 7.2 mg pen is licensed for. The MHRA approved it for adults with a BMI of 30 or above, the cardiovascular indication is not covered by this pen. If you want to understand the milligram breakdown at each stage of the schedule, this page on Wegovy pen strengths in mg goes into the numbers in detail. Clinical trial data at the 7.2 mg dose showed an average weight reduction of around 20.7% over 72 weeks, which narrows the gap with the highest tirzepatide doses reported in the SURMOUNT-5 trial.

Specific dose availability is confirmed at the point of clinical assessment, a prescriber reviews which pen is right for you before anything is dispensed.

Doses, increments and why you can't just jump ahead

Semaglutide is titrated slowly for a reason. Starting at 0.25 mg and stepping up through 0.5 mg, 1.0 mg, 1.7 mg, and 2.4 mg (with 7.2 mg as the ceiling) gives your body time to adjust to the GI effects that come with GLP-1 medicines, nausea in particular. Each step typically lasts around four weeks, which is also why one pen equals one supply period at most strengths.

You cannot combine doses from two different-strength pens to hit the next level faster. Each pen is pre-set and the device doesn't allow partial doses. The Wegovy dose increment guide explains the timing and the reasoning behind the escalation, which is grounded in the NHS's own guidance on weight-management injections.

If you're curious how the 1.7 mg pen fits into this (since it's the step most people find least discussed) details on the 1.7 mg pen's dose count are worth a look before your titration reaches that point. The count is four, same as the others, but the pen format can look different from the earlier strengths.

According to the NHS semaglutide medicines page, missing a dose within five days of when it was due means you can take it late; missing it by more than five days means you skip it and continue the following week. Never double up. These decisions belong to your prescriber and the patient leaflet.

Wegovy as a prescription medicine, and what that means for how you access it

Because Wegovy is a prescription-only medicine, the number of doses and pens you receive at any one time is determined by a prescriber's authorisation, not by how many you'd like to order. A legitimate supply always comes with a valid prescription following a clinical assessment. That's not a formality, it's the framework that makes treatment safe.

There's a meaningful difference between buying from a regulated, GPhC-registered pharmacy and buying from an unverified seller online. The MHRA has warned repeatedly about counterfeit weight-loss pens circulating through social media and unofficial websites. You can check any online pharmacy's registration at the GPhC pharmacy register, it takes about thirty seconds.

Cost is a reasonable question too. If you're thinking about what a private Wegovy supply actually costs and what those monthly figures include, the Wegovy cost page sets out the current landscape honestly. For a broader look at how Wegovy compares with other licensed weight-loss treatments, the treatment overview covers the options available through a regulated UK service.

If you'd like a prescriber to assess whether Wegovy is the right fit for your circumstances, start your free consultation and a GPhC-registered prescriber will review your case the same day.