What Happens If You Miss a Week of Wegovy

Step one: work out where you are in the week

Wegovy (semaglutide) is injected once a week, and the medicine has a half-life of roughly a week in the body. That means levels fall gradually rather than dropping off a cliff the moment a dose is overdue. So if you realise on a Tuesday that you forgot your Sunday injection, you still have time to act.

The Patient Information Leaflet states: inject the missed dose as soon as you remember, unless your next scheduled injection is fewer than five days away. If it is fewer than five days, leave the missed dose and carry on as normal on your regular day. Do not inject two doses in quick succession to catch up. More detail on the immediate steps after a missed shot is worth reading before you do anything.

One practical tip: if you tie your injection day to something fixed (Sunday evening after dinner, for instance) a missed week is usually caught within a day or two, well inside the five-day window. If you find yourself asking whether it is ok to miss a week of Wegovy, the short answer depends largely on where in the week you catch the lapse. The NHS medicines page for semaglutide covers this guidance clearly and is a reliable first reference.

Step two: understand what one missed dose actually does to your body

Because semaglutide lingers in the bloodstream for days, a single missed injection does not erase weeks of treatment. Most people notice the effect mainly as a modest return of appetite in the latter half of the missed week, the medicine's appetite-suppressing effect softens as levels dip. Cravings that had quietened may reappear for a few days. That is a normal physiological response, not a sign that treatment has stopped working.

Weight itself is unlikely to shift dramatically from one missed dose. The STEP 1 trial published in the New England Journal of Medicine showed that sustained average weight loss of around 15% requires consistent weekly dosing over many months, the benefit is cumulative. A single gap makes a small dent in that consistency; it does not undo it.

If the missed dose falls during a week when you were unwell with vomiting or diarrhoea, it is worth telling your prescriber: gastric illness on top of a missed dose can occasionally lead to dehydration, and the two together merit a conversation rather than a quiet skip.

Step three: what changes if the gap stretches beyond one week

A gap of more than two weeks is a different situation. Semaglutide levels will have fallen substantially, and the gastrointestinal side effects that many people experience when first starting treatment (nausea, loose stools, indigestion) can return when the injections resume. The longer the break, the more likely the body responds as though it is restarting.

Some prescribers will advise stepping back to a lower dose after an extended gap, in the same way the titration schedule works at the start of treatment. This is not a failure; it is the sensible way to avoid unnecessary discomfort. What happens after two missed weeks of Wegovy covers this scenario in more depth.

Supply disruptions have led some patients to face unplanned gaps. If your pen has not arrived and your stock is running low (for example, you ordered after 12pm on a Friday and the week ran away from you) the right call is to contact your pharmacy early rather than waiting until you have nothing left. Reach the nume team any day of the week if that situation arises.

Step four: when to speak to your prescriber rather than self-manage

Most missed-dose questions are genuinely straightforward, but a few warrant a direct conversation. Speak to your prescriber if: you have missed more than one dose in a row, if side effects return and feel severe on resuming, if you are on a titration step and unsure whether to hold or move, or if you are also taking oral contraceptives, tirzepatide is the medicine where pill absorption can be affected by dosing changes, but any uncertainty about interactions is worth raising. Many patients also wonder whether they can miss a week of Wegovy without consequences, and the answer usually depends on their current dose and how recently they titrated up. Our FAQs address several of the most common practical questions.

Wegovy is a prescription-only medicine, and that label exists for good reason. The prescriber who reviewed your case knows your medical history and your current dose. A quick question to them costs nothing and takes far less time than managing an unnecessary side-effect flare. People sometimes search for whether it is okay to miss a week of Wegovy, and while the clinical picture is often reassuring, checking with your prescriber is always the safest route. The clinical team at nume is available seven days a week for exactly this kind of aftercare question, not just at the point of ordering.

If you are currently without a prescriber and looking at your options for clinically supervised semaglutide treatment, speak to our prescribers about a free consultation to find out whether Wegovy is suitable for you.