Missed your Wegovy injection? Here's what to do next

The decision you're actually facing: to inject late, or to skip?

Missing a weekly injection feels alarming, but the situation is usually straightforward once you know the threshold. Count back from the day your dose was due. If fewer than five days have passed, inject as soon as you notice the gap. Your next dose then falls on the same weekday as always, keeping the rhythm intact. If the window has closed beyond five days, the right call is to skip that missed pen and wait for your next scheduled injection day.

What you should not do is take two doses close together to compensate. Stacking injections raises the concentration of semaglutide in your system sharply and significantly increases the likelihood of nausea, vomiting and other gastrointestinal effects. One missed dose is a minor interruption; two doses in a short window can set your tolerability back by weeks.

The NHS semaglutide patient information page sets out this five-day rule in plain terms and is worth bookmarking alongside your Patient Information Leaflet for exactly these moments.

What actually happens in your body when a weekly dose is delayed

Semaglutide has a half-life of roughly a week, which is precisely why once-weekly dosing works. A single late or skipped injection does not switch the medicine off abruptly. The drug concentration in your system falls gradually, so appetite suppression and the slower gastric emptying that helps you feel full for longer will fade rather than disappear overnight. Most people notice a mild return of appetite within a few days of a missed dose, but the effect is rarely as sharp as it was before starting treatment.

What can happen after a longer gap, or repeated missed injections, is that your body responds to the reintroduced dose as if to something slightly new again. Gastrointestinal side effects, such as nausea, loose stools or bloating, may resurface temporarily. This is the same settling-in process described on the Wegovy injection page, and it usually passes within a few days. Let your prescriber know if it lingers or becomes difficult to manage.

If you are considering whether one pen format suits your routine better than another, that is a useful thing to raise at your next clinical review rather than something to change unilaterally. The Wegovy injection guide covers the pen formats currently licensed in the UK.

Keeping your schedule on track and reducing the chance of missing again

The simplest habit that works for most people is tying the injection to something that already happens on the same day each week: a Sunday evening routine, a Monday morning alarm, or the day a food shop arrives. The pen itself is delivered by DPD in plain, unbranded packaging, and lives in the fridge door; seeing it there is a useful prompt. Setting a phone reminder for five minutes before the habitual moment adds a second layer without much effort.

Storage matters too. Each Wegovy pen should be kept refrigerated between 2°C and 8°C until needed. If yours has been left out, the Patient Information Leaflet specifies the exact room-temperature window permitted; check it before injecting rather than assuming. Using the wrong needle or a blunt one can also make injections more uncomfortable, which is a quiet reason some people defer them. Replacing the needle for each injection is standard practice, and compatible pen needles are available separately if you need to restock.

For a broader look at how Wegovy fits into a longer treatment plan, the Wegovy overview covers the full licensed indication and what to expect across the titration schedule.

When a pattern of missed doses is telling you something worth paying attention to

One missed injection is unremarkable, and if you want to understand the specific consequences in more detail, our guide to what happens if you miss your Wegovy shot walks through the key scenarios, including advice on what happens if you miss a day of Wegovy and how to get back on track. A pattern of missed injections sometimes reflects something worth exploring: side effects that feel manageable enough to push through but unpleasant enough to delay, anxiety about injecting, or a schedule that genuinely does not fit the weekly rhythm. None of these is unusual, and all of them are things a prescriber can help with. Adjusting the injection day, discussing anti-nausea strategies, or reviewing whether the current dose is right for you are all legitimate clinical conversations, not admissions of failure.

The NHS England weight management injections guidance notes that ongoing clinical support is an expected part of treatment, not an optional extra. At nume, every repeat order goes through a fresh review by a GPhC-registered prescriber — the kind of check where a pattern of missed doses or returning symptoms would naturally come up. There is no subscription auto-sending pens without that clinical step.

If you have questions about cost or want to understand what a private prescription includes, the Wegovy pricing page explains what is covered. And if you have not yet started treatment but are weighing up your options, the treatment overview is a useful starting point before a consultation.