Missing a Week of Wegovy: What to Do and What to Expect

The two paths after missing one week: what the timing actually decides

The most common misconception here is that missing a dose means starting over. It doesn't. Semaglutide accumulates and clears slowly; a single absent week reduces the level in your body but does not eliminate it. The clinical guidance is built around a clear time-based rule.

If you realise you've missed your injection and your next scheduled dose is still more than two days away, inject as soon as possible and then return to your original weekly day. If your next dose is due within two days (or is already due), leave the missed one entirely and take only the next scheduled injection on its usual day. Doubling up is not a path around the problem, it raises the risk of nausea, vomiting and other gastrointestinal effects without clinical benefit, and the leaflet is explicit on this point.

Practically: set a weekly reminder on your phone and keep your pen somewhere you'll see it. Many people link their injection to a fixed weekly routine, a Sunday evening or a Monday before work. If your schedule shifts, note the new day consistently. Our guide to a missed Wegovy shot covers the logistics in more detail if you want the step-by-step version.

One thing worth knowing: the five-day window applies specifically to semaglutide's pharmacokinetics. Taking semaglutide twice in one week carries real risks and is never a fix for a gap.

What your body actually does during a missed week

Semaglutide's long half-life, roughly seven days, means the drug is still present and active even after a week's gap, though levels will have dropped meaningfully. Most people notice this as a gradual return of appetite, sometimes stronger than they expected. That's biology, not failure. The GLP-1 receptor agonist effect on gastric emptying and satiety signals fades with falling plasma levels, so hunger reasserts itself.

For many people this resolves within a day or two of the next injection. The medicine re-establishes its effect as levels climb back. A single missed week is unlikely to undo weeks of metabolic adjustment, and stopping Wegovy entirely is a different situation with different implications.

Where it gets more complicated is with longer gaps: four weeks or more without an injection, whether planned (surgery, travel, supply disruption) or unplanned. After that length of time, the tolerability adjustment made during titration may have partially reversed. Restarting at the maintenance dose can cause more side effects than it did originally, which is why prescribers often recommend stepping down temporarily. This is a clinical decision, not one to make alone. If your gap has stretched beyond a month, speak to your prescriber before injecting again rather than resuming at the dose you left.

Information about the full side-effect profile, including the gastrointestinal effects most likely to surface during dose or schedule changes, is covered in the NHS medicines information for semaglutide.

When a missed week becomes a pattern: protecting your progress

Occasional missed doses happen to most people at some point. The clinical evidence base for semaglutide, including the STEP 1 trial published in the New England Journal of Medicine, was built around consistent weekly dosing, so consistency genuinely matters for achieving the results the data describes. A one-off gap is not the same as repeated irregular use.

If missing doses is becoming a pattern, it's worth identifying why. Supply disruptions, cost pressure, side effects at a given dose, travel schedules, and practical barriers like refrigeration access are all things a prescriber can work with. Understanding the full cost picture for Wegovy is sometimes the first step. Side effects that make each injection something to avoid are a clinical conversation, not a reason to quietly stop. Persistent nausea or vomiting after weeks at a dose may warrant slowing the titration schedule rather than pushing through.

If you've had an unplanned gap and you're not sure whether to inject now or wait, this page on a missed Wegovy injection walks through several specific scenarios. And if a shorter gap applies, say you missed by a day rather than a week, the considerations are slightly different, that's covered separately in our guide to a missed day of Wegovy.

Checking your eligibility and next step with a prescriber

Wegovy (semaglutide) is licensed in the UK for adults with a BMI of 30 or above, or 27 and over alongside a weight-related health condition. Lower thresholds apply for certain ethnic backgrounds under UK guidance. Clinical suitability goes beyond a single number, a prescriber considers your full health picture, any other medicines you take, and how your treatment is going so far. NHS access remains limited through specialist services with substantial waiting times; private treatment through a regulated pharmacy is the realistic route for most people who don't meet the current NHS criteria or aren't willing to wait.

If you have questions about your dose schedule, a recent gap, or how to restart after a longer break, speaking to a prescriber is the right call. At nume, every repeat order is clinically reviewed by a GPhC-registered Independent Prescriber before it's approved, and our clinical team is available seven days a week. You can read more about how the service works on the about us page, or speak to our prescribers by starting a free consultation.