Can I skip one week of Wegovy — and what happens if I do?

Step 1: Check where you are in the five-day window

The Wegovy Patient Information Leaflet sets out a specific rule for missed doses: if you remember within five days of your usual injection day, take the missed dose as soon as you can and then return to your normal weekly schedule. If more than five days have passed, skip that dose and wait for your next scheduled injection day. That's the practical check you can do right now, count back from today.

The reason there's a window at all is that semaglutide has a relatively long half-life. It stays active in your system for several days after injection, which is why the treatment is weekly in the first place. One missed dose doesn't erase weeks of progress, but stretching the gap significantly can reduce how consistently the medicine works. The NHS semaglutide medicines page includes further guidance on missed doses and is worth bookmarking for quick reference.

Never take two doses on the same day to compensate. That advice appears in the leaflet, is consistent with NHS guidance, and is worth remembering: doubling up doesn't recover lost ground, it just increases the chance of side effects.

Step 2: Expect your appetite to shift, and don't panic about it

When a dose is missed, some people notice hunger returning more noticeably within a few days. That's a normal physiological response to lower circulating levels of the medicine, not a sign that Wegovy has stopped working for you. For most people, appetite settles again once the next dose is on board.

It's also worth knowing that the first few doses of any new strength (including after a break) can bring back some of the early side effects: nausea, loose stools, or feeling full very quickly. This isn't universal, but it's a reason to be gentle with yourself around eating in the days after you restart. Sticking to smaller, lower-fat meals in the short term often helps. If side effects feel pronounced after resuming, that's a signal to flag to your prescriber rather than push through quietly.

People who've been on Wegovy for a while sometimes find that a missed week prompts them to reflect on what support they actually have. If you're managing your treatment through a service with seven-day aftercare access, questions like this can be answered the same day rather than left to worry about.

Step 3: Think differently about planned skipping versus accidental misses

Life happens, travel, illness, a pen that didn't arrive in time. An accidental miss now and then is part of real-world treatment, and our guide to missing one week of Wegovy walks through exactly what to expect and how to get back on track. Planned skipping is a different question. Some people wonder whether they can deliberately skip a week around a holiday, a social event, or to stretch a prescription further. The honest answer is that this is a clinical decision, not a lifestyle one.

The concern isn't just about reduced effectiveness. Deliberately pausing and restarting treatment can affect tolerability, side effects sometimes resurface when you go back to a dose your body had adjusted to. There's also the question of titration: if you've been on a higher dose, your prescriber needs to know before you make changes. A page covering skipping Wegovy around a holiday specifically goes into more practical detail on that scenario, and if you're weighing up whether skipping a week of Wegovy is ever appropriate, that page sets out the clinical considerations clearly.

The cost of treatment is a real factor for many people, and if affordability is making you ration doses, that's worth discussing openly. Our guide to Wegovy pricing in the UK covers what private treatment actually costs and what to watch out for. And if you're assessing whether your current plan still makes sense, the Wegovy doses page explains how the titration schedule works from start to maintenance.

Step 4: Know when to contact your prescriber rather than wait

Most single missed doses don't require urgent contact, following the five-day window rule and resuming normally is appropriate. But there are situations where getting clinical input quickly is the right call. If you've missed multiple doses in a row, if you're unsure whether you should stay on your current dose or step back down, or if side effects on restarting feel more intense than usual, speak to your prescriber.

The same applies if you've been unwell and couldn't inject, illness affecting your stomach or hydration already puts some strain on your system, and adding a dose on top of that without clinical input isn't always straightforward. Our page on what actually happens after skipping a week covers the physiological picture in more detail.

Wegovy is a prescription medicine that works best as part of a supported programme. The NHS England guidance on weight management injections is clear that ongoing clinical oversight matters, not just at the point of prescribing. If you're wondering whether your current treatment is still the right fit, check your eligibility and speak to a prescriber who can review the full picture.