Taking a week's break from Wegovy: what actually happens

Step 1: work out how long the gap actually is

Wegovy's active ingredient, semaglutide, has a half-life of roughly a week. That means it lingers in your system well after the injection day passes. A gap of a few days feels significant, but the medicine is still working. The NHS medicines guidance for semaglutide sets a practical ten-day rule: if you are within ten days of your missed dose, take it as soon as you remember and shift your injection day to match. If you are beyond ten days, skip that dose entirely and wait until your next scheduled one.

That ten-day boundary is the starting point, but it does not cover every situation. People who have been off Wegovy for two, three or four weeks are in different territory to someone who is three days late. And someone who stopped at 1.7mg is in a different position to someone who had only just moved to 0.5mg. The gap length, the dose you were on, and your reason for stopping all feed into what a sensible restart looks like.

A question our prescribers hear regularly is whether one missed injection undoes months of progress. The short answer is no, but extending a break without clinical input is where the risk creeps in. If you are unsure where you stand, this page on every-other-week dosing covers what irregular timing does to the medicine's effectiveness over time.

Step 2: understand what a longer break does to your appetite and side effects

Two things tend to happen when semaglutide clears your system. First, appetite returns. GLP-1 medicines reduce hunger partly by slowing how quickly food leaves the stomach and partly through signals to appetite centres in the brain. Without the medicine, those signals fade, often within a fortnight. Some people notice this more than others, and how quickly it happens varies.

Second, restarting at your previous maintenance dose after a longer break can bring back the nausea, stomach discomfort and fatigue that many people experienced in the early weeks. The gastric-emptying slowdown that your gut adapted to is effectively new again. That is why clinical guidance generally favours stepping back down the dose ladder and re-titrating when a meaningful break has occurred, what counts as meaningful is something to work through with your prescriber.

The NHS page for semaglutide covers the standard side-effect profile and what to expect during dose increases. It is worth reading if you are planning a restart, so you know which symptoms are expected and which need medical attention.

Step 3: talk to your prescriber before stopping or restarting

A planned break (for surgery, a holiday, a side-effect concern, or simply wanting to pause) is best handled before the break starts. Surgery is a specific case worth naming: NHS England advises telling your anaesthetist you are taking a GLP-1 medicine ahead of any procedure, and your surgical team may ask you to stop for a set period beforehand. Do not leave that conversation until the morning of the operation.

For other planned breaks, the question of whether to stop, taper, or carry on is genuinely individual. Factors like how well the medicine has been tolerated, current dose, and the reason for pausing all shape the answer. If you are thinking about this because of cost, it is worth knowing that how Wegovy is priced in the UK varies by provider, and the clinical oversight you get from a legitimate service is part of what keeps restarts safe. At nume, your prescriber reviews every repeat order, so there is no need to make these calls alone. Speak to our prescribers before making changes to your schedule.

If your question is whether you can adjust your injection day rather than stop entirely, the rules around Wegovy's dosing frequency are worth reading first. And if you have not yet started treatment, you may also be wondering whether you can get Wegovy from your GP, as the eligibility criteria and routes to access differ depending on where you go. The eligibility overview for Wegovy explains what the licensed criteria look like. Our full Wegovy guide brings all of this together if you want a broader picture before your consultation.