Forgot to Take Your Wegovy Shot? What Happens Next

You've realised mid-week that last Sunday's pen never happened

It's a familiar moment: you open the fridge, notice the pen sitting there untouched, and feel a small wave of frustration. The good news is that semaglutide stays active in your body for longer than most medicines you'd take daily. Its half-life stretches across roughly a week, which is precisely why it can be taken once weekly in the first place. A single missed dose does not reset your progress or trigger sudden weight regain overnight.

The first thing to do is count the days. A quick way to make this a reliable habit: glance at your phone's calendar when you remember and count back to your last injection day, it takes under a minute and removes any guesswork. If you forgot to take your Wegovy shot and five days or fewer have elapsed, inject it now. Then keep your usual weekday going forward as if nothing changed.

If it has been six or seven days, you are essentially at the edge of your next scheduled dose anyway. In that situation, skip the one you missed and simply take your next injection on its normal day. The guidance on choosing your Wegovy injection day can help you pick a slot that is easier to remember each week, which reduces the chance of this happening again.

Why taking two doses at once is a line worth holding

It can feel logical to double up after forgetting, to "catch up" and stay on track. With semaglutide, that logic does not apply. Wegovy is a GLP-1 receptor agonist that works by slowing gastric emptying and reducing appetite signals over time. The medicine's effects are cumulative across weeks, not dose-by-dose. Taking twice the amount in a single week does not accelerate progress; it significantly raises your chance of severe nausea, vomiting, and the kind of gastrointestinal discomfort that makes people want to stop treatment altogether.

The NHS guidance on semaglutide is clear on this point: do not take a double dose to make up for a forgotten one. If you are unsure about what counts as doubling up (for instance, if you are mid-titration and have already drawn a partial dose) speak to your prescriber before injecting. This is not an area to estimate.

It is also worth noting that missing a dose occasionally will not remove you from treatment or require you to restart from your beginning dose. Continue at the strength your prescriber has you on. If you have missed several doses in a row for any reason, that is a conversation to have with your prescriber before your next injection, as they may want to review your titration before you continue. You can read about how Wegovy's clinical guidelines shape decisions like these.

Side effects after resuming: what to expect

After a short gap in treatment, some people notice a brief return of nausea when they resume injecting. This is more common after longer breaks, a week or two away from the medicine can mean your tolerance has softened slightly. It rarely means anything is wrong. The gastrointestinal effects of semaglutide, including nausea, looser stools and occasional dizziness, tend to be most noticeable at the beginning of treatment and around dose increases; a brief resumption effect usually passes within a few days.

If side effects feel severe, persistent, or include anything beyond the expected gastrointestinal pattern (particularly severe abdominal pain that spreads towards your back) get medical help promptly. The MHRA has highlighted pancreatitis as a serious but infrequent risk with GLP-1 medicines, and sudden or intense stomach pain is the signal to act on quickly rather than wait out. Suspected side effects can be reported via the MHRA's Yellow Card scheme.

The step-by-step guide to administering a Wegovy injection covers site selection, technique and what to check before each dose, useful reading if this pause has left you wanting to feel more confident with the pen again.

Building a routine that makes missed doses rare

The most effective approach to managing a weekly injectable medicine is removing the need to remember at all. Pick a day that is consistently low-disruption for you, not a day you travel regularly or one that moves around your schedule. Many people attach the injection to something already fixed in their week: a Sunday evening routine, the first morning of the working week, or a specific weekend ritual.

Storing your pen somewhere visible in the fridge, rather than tucked behind other items, makes a real difference. A phone reminder set for the same day and time every week adds a second layer without any extra effort. If you find that you are forgetting your Wegovy shot more than occasionally, it is worth mentioning at your next review, sometimes a different injection day, or a brief check on how treatment is fitting into daily life, makes consistency easier. For a broader look at how semaglutide works and what to expect across the full course of treatment, the Wegovy overview is a useful reference. And if you are thinking about cost as you settle into treatment, a Wegovy price comparison sets out what private treatment typically includes across the market.

If you have questions about your specific situation, our prescribers are available seven days a week. Speak to our prescribers through a free consultation and get a clinical answer rather than a best guess.