Missed a Wegovy dose — what happens next?

The five-day rule: your actual decision point

A lot of people assume a missed injection means starting over or that something will go wrong with their treatment. That's not the case. The Patient Information Leaflet for Wegovy is clear: if you remember within five days of the missed dose, go ahead and inject it, then continue from your original weekly schedule. If more than five days have elapsed, leave it. Take the next injection on the day you would normally use it, your schedule doesn't shift.

What this means in practice is that the decision tree is short. You check the date, you count five days, and you act accordingly. There's no need to take an extra dose to compensate, and there's no benefit in injecting twice in quick succession to 'catch up'. Doubling up increases the risk of side effects without adding any clinical advantage.

If you're uncertain whether you can skip a Wegovy dose in your particular circumstances (for instance, you've been unwell and missed two injections in a row, or you're approaching a dose increase) the Wegovy dose schedule page has more detail, and your prescriber is the right person to advise on what comes next.

What a gap actually does to your body

Semaglutide works by activating GLP-1 receptors, slowing gastric emptying and reducing appetite signals. It has a long half-life (roughly one week) which is precisely why once-weekly dosing works. A single missed injection doesn't mean semaglutide leaves your system immediately; levels fall gradually over the following days rather than dropping off a cliff.

The practical consequence of a short gap is usually modest. Appetite may return more noticeably a few days after the missed injection, and you might feel hungrier than you've grown used to. After a longer break (two weeks or more) some people notice a temporary increase in gastrointestinal symptoms when they restart, similar to what happened when they first began treatment or increased their dose. Nausea, loose stools and fatigue are the most commonly reported effects in that situation, as noted in the NHS semaglutide medicines page.

This is worth knowing ahead of time, not so it worries you, but so you're not caught off guard. A bit of extra nausea after returning to treatment after a gap is normal and usually settles within a few days.

When missed doses become a pattern worth addressing

One skipped injection is a normal part of real life. A recurring pattern is a different conversation. If doses are being missed regularly (because of side effects that make injection days daunting, storage problems when travelling, or simply forgetting) that's useful clinical information. It can affect how much weight-loss benefit you're getting from treatment, and it can also flag that a dose adjustment or some practical support might help.

For context on how a consistent dosing schedule connects to the results seen in clinical trials (where the STEP 1 study reported an average body-weight reduction of around 15% over 68 weeks) it's worth reading about how Wegovy works as a treatment. Those figures came from participants who injected regularly. Gaps compress the benefit, though they don't eliminate it.

There are also questions specific to missed doses at particular points in the schedule, including whether you can skip a week of Wegovy and, relatedly, what to expect if you do is covered in more detail on the page about skipping a week of Wegovy, which is worth reading alongside the guidance on whether skipping one week is something your prescriber should know about in advance rather than simply missing one injection by accident. The short answer is that the same five-day rule applies, but your prescriber should know if you're planning a break rather than simply missing one injection by accident.

Starting Wegovy or reviewing your treatment

If you're not yet on Wegovy but are considering it, this is a prescription-only medicine. That means a prescriber assesses your suitability before any treatment begins, looking at your BMI, medical history and any medicines you already take. Private treatment avoids NHS waiting lists, and a regulated service provides the same clinical rigour without the wait.

Pricing for private treatment is one thing people reasonably want to understand before committing; the weight-loss treatments page sets out what's included and what to expect. For a broader look at the options available, the weight-loss overview covers how the different medicines compare and who each one tends to suit.

At nume, a GPhC-registered prescriber (a named clinician, not software) reads every consultation the same day it's submitted. If you're already a patient with a question about a missed dose or anything else that's come up during treatment, our team is available seven days a week. If you're new and want to check whether Wegovy is right for you, a free consultation is the place to start.

Start your free consultation and have your answers reviewed the same day by one of our prescribers.