Can You Miss a Week of Wegovy, and What Should You Do Next?

It's the night after your scheduled injection and you've just found the pen in the fridge, still sealed

Most people asking whether they can miss a week of Wegovy are not asking for philosophical permission. They've already missed it, or they can see it coming (a holiday, a procedure, a week where life got in the way) and they want to know what that actually means for their treatment and for how they'll feel.

The short answer is that a single missed week is unlikely to undo meaningful progress. Semaglutide, the active medicine in Wegovy, has a half-life of roughly one week, so levels in your body fall gradually rather than dropping overnight. How semaglutide works in the body means appetite suppression tends to ease off before it disappears entirely, which is why some people notice hunger creeping back after five or six days even when they haven't missed anything, the timing is simply the medicine's own rhythm.

What matters most is what you do next. The five-day rule from the Patient Information Leaflet is the practical guide: inject as soon as you remember if fewer than five days have passed since your planned date, then restart from that new day going forward. Beyond five days, leave the missed dose and pick up your schedule from the original day as if nothing was skipped. What to do if you miss a week of Wegovy covers the exact steps in more detail, including how to recalibrate your day-of-week if it shifts.

The one thing the leaflet is firm about: do not use two pens in seven days. Doubling up does not accelerate weight loss; it significantly increases the chance of difficult GI side effects.

Why you might feel rough for a few days after a gap

A side effect pattern worth knowing: when semaglutide levels dip and then rise again after a missed week, nausea, bloating and stomach discomfort can return temporarily, sometimes to a degree that feels like starting treatment again. This is more noticeable if the gap coincides with a recent dose increase, because your body was still adjusting to the higher level before the interruption. Managing constipation and GI side effects on Wegovy has practical tips for settling things down in those first days back.

The NHS semaglutide medicines page lists the GI effects associated with Wegovy and notes that they are generally transient and tend to ease with time. After a gap, they usually settle within a few days, just as they did when you first started. Eating smaller portions, staying well hydrated and avoiding high-fat foods in the first couple of days back can make the transition easier.

If the discomfort is severe (particularly persistent, intense stomach pain that spreads towards your back) seek medical help promptly rather than waiting it out. That symptom pattern is one the MHRA specifically flagged in its January 2026 Drug Safety Update on GLP-1 medicines and pancreatitis, and it warrants assessment rather than self-management.

When a single missed week becomes something worth discussing

One skipped injection is rarely a clinical event. But there are situations where a gap in Wegovy treatment is a useful prompt to check in with your prescriber before continuing, rather than simply picking up where you left off.

If you missed the week because of significant illness involving vomiting or diarrhoea, your hydration and any related medications matter more than the dose timing. If you missed several consecutive weeks (which can happen during surgery, hospital stays or a period of poor health) resuming at the same dose you left on is not always the right call. Prolonged gaps can mean your tolerance has reduced, and a prescriber may want to step you back to a lower dose temporarily to avoid difficult side effects. For more on this, what a missed week of Wegovy means for your treatment plan outlines the considerations clearly.

It is also worth being honest with yourself if doses are being missed regularly. Wegovy is most effective as part of a consistent routine alongside dietary changes and activity. Wegovy for weight management covers the full treatment picture, including what the trial evidence says about long-term use. If cost is creating pressure on adherence, Wegovy pricing in the UK breaks down what to expect from private prescriptions so there are no surprises at the pharmacy. And if you have other questions about continuing treatment, our FAQs cover a range of common situations.

Ultimately, semaglutide is a prescription-only medicine and these decisions belong to your prescriber, not a five-minute internet search. If you're unsure about restarting after a longer gap, speak to a clinician before injecting rather than after. Check your eligibility with our prescribers if you're looking for clinical guidance on continuing or starting treatment.