Understanding the Wegovy click method before your first injection

What the clicks on your Wegovy pen actually tell you

The Wegovy pen is a pre-filled, dial-and-inject device. Before you inject, you rotate the dose selector until the correct dose appears in the window. As you turn it, you'll feel and hear small detent clicks — these are the dial increments, not confirmation of anything yet. The number in the window is what you've set; no dose has moved anywhere.

The critical click comes at the other end of the process. Once the needle is under the skin and you press the purple injection button, the plunger drives the medicine through. Keep steady pressure on the button and hold the pen in place. When the plunger has fully travelled and the dose is complete, the pen delivers a distinct final click, firmer and often louder than the dial clicks. That click means delivery is done. The guidance on the Wegovy patient information leaflet, summarised on the NHS semaglutide page, is explicit: continue holding the pen against the skin for a further ten seconds after this click before withdrawing.

Why does ten seconds matter? Subcutaneous delivery is slower than an intravenous one. Pulling away immediately can allow a small tail of medicine to track back along the needle track, meaning the dose you set isn't entirely the dose you received. It's a small difference in timing with a meaningful effect on consistency.

You can find a detailed breakdown of how the clicks map to specific dose steps, including a full Wegovy click chart for the 2.4 mg strength, which covers each increment at that maintenance dose, on the Wegovy click chart, which covers each strength in the titration schedule.

The decision that trips people up: what to do if the window doesn't reach zero

After the final click and your ten-second hold, you'll withdraw the pen and check the dose window. Ideally it reads zero, the full dose delivered. If the window shows a number above zero, not all of the medicine was injected. This is the decision the click method is specifically designed to prevent, but it can still happen if the pen is angled awkwardly, the button wasn't pressed fully, or the skin was pinched in a way that blocked the plunger.

Your prescriber and the patient information leaflet are the authority on what to do when this happens, not a forum post, not a general guide. Do not attempt to re-inject the remainder into the same site or into a different site without clinical guidance. Contact your prescribing team. At nume, our aftercare team is available seven days a week for exactly this kind of question.

The Wegovy click guide covers the pen's dose window in more detail, including what a properly zeroed window looks like versus a partial delivery.

Choosing and preparing the injection site

Three sites are licensed for subcutaneous delivery: the abdomen (avoiding the area directly around the navel), the outer thigh, and the outer upper arm. Rotation matters. Using the same spot repeatedly causes a localised tissue response (lipohypertrophy) that can reduce absorption and leave a raised, firm patch. A practical habit many patients develop is to assign different sites to different weeks, or to map sections within each site.

Before injecting, the skin should be clean. Alcohol swabs are the standard method; allow the area to air-dry for a few seconds before inserting the needle, since injecting through wet alcohol can cause brief stinging. Remove the outer cap and inner needle cap only immediately before use. The needle is a single-use item; the question of reusing needles comes up often, and the answer is always no, a used needle is blunted, potentially contaminated, and carries an infection risk.

If you're thinking about cost in the context of managing your treatment, the Wegovy price guide sets out what private prescriptions typically include and what to look for in a provider.

Practical timing and what to do when life gets in the way

Wegovy is injected once a week, and the day you choose becomes your anchor. Busy periods (the run-up to a long weekend, a holiday, a Monday when you've only just remembered) don't have to derail the schedule as badly as people fear. If you need to shift your injection day, the clinical rule is that at least 48 hours must pass between doses. Moving a Thursday dose to a Saturday is fine as a one-off adjustment; moving it forward to a Tuesday is not. For any change that's more than a day or two in either direction, check with your prescriber first.

Storing the pen correctly keeps the medicine stable. Wegovy is refrigerated at 2–8°C between uses; if a pen has been left at room temperature, the exact window within which it remains usable is specified in the patient information leaflet, and that document (not this page) is your reference. The NHS medicines page for semaglutide summarises the key handling points in accessible language.

If you haven't yet started Wegovy and want to understand the full treatment journey, our Wegovy overview covers eligibility, how the titration works, and what to expect from a private prescription through a regulated pharmacy. When you're ready, start your free consultation with our clinical team.