Missed a Day of Wegovy — Here's What to Do Next

The situation: it's Tuesday, your usual injection day was Sunday, and the pen is still in the fridge

Life gets in the way. The pen sat waiting in the fridge door while you dealt with a busy weekend, and now it's two days past your scheduled dose. The first thing to know: Wegovy's once-weekly dosing means that semaglutide stays active in your system for several days, so a short delay rarely undoes your progress or causes an immediate problem.

According to NHS guidance on semaglutide, if you've missed your usual injection day and fewer than 5 days have passed since it was due, take the dose as soon as you remember. Then go back to your normal weekly day, meaning you don't take a second injection to 'catch up' on the day you'd originally planned. One dose per week, no exceptions.

A delay of a day or two like this is unlikely to cause noticeable side effects or a sudden return of appetite, and our page on what happens if you miss your Wegovy shot walks through exactly what to expect when you pick up your routine again. The medicine's half-life is long enough to keep working steadily. That said, some people do notice mild nausea when they restart after even a brief gap, particularly if they're earlier in their titration, slow and steady wins here.

What to avoid: doubling up. Taking two doses close together significantly raises the risk of gastrointestinal side effects (nausea, vomiting, and stomach discomfort) without providing any therapeutic benefit. Two pens at once is never the answer.

When 5 or more days have passed: skip and reset

If your late injection is now within 2 days of when your next weekly dose would be due (so roughly 5 or more days since the missed one) the guidance changes. At that point, skip the late dose entirely and resume your normal schedule on the original weekly day. In practice this means you'll have gone about two weeks between injections that cycle. Your appetite may increase and you might feel some effects of the gap, but restarting on your usual day is safer than injecting too close together.

This isn't just about side effects. Semaglutide's slow elimination from the body means stacking doses creates an accumulation effect that your prescriber didn't account for when setting your schedule. The Wegovy SmPC on the electronic Medicines Compendium sets out this reset rule clearly, and your Patient Information Leaflet carries the same instruction in plain language, worth a quick read if you haven't looked at it recently.

If you're not sure which category your situation falls into, our FAQs page covers a range of common scheduling questions, and our prescribers are available seven days a week. It's a straightforward question to ask.

What a disrupted schedule might mean for your progress

A single delayed dose, handled correctly, is unlikely to meaningfully affect your overall results. Clinical trials of semaglutide 2.4mg (including the STEP 1 study published in the New England Journal of Medicine) assessed outcomes over 68 weeks, a period during which real-world participants inevitably experienced the occasional disruption.

Where disruption starts to matter more is when doses are missed repeatedly or when a schedule slips across several weeks. In that case, some prescribers consider a brief period back at a lower dose (effectively a short resensitisation) before returning to the maintenance level. This is a clinical decision, not something to self-manage. If your schedule has been unreliable for more than a fortnight, that conversation is worth having.

There's also a practical pattern worth noting: many people who miss injections are approaching a dose increase and feeling ambivalent, or are dealing with side effects that made them reluctant to inject on time. Both are legitimate things to raise. Our clinical team, led by a GPhC-registered prescriber, reviews each patient individually, you can read more about how that oversight works on our clinical team page. The cost of private treatment, and what's included, is covered separately on the Wegovy cost page.

Related scenarios that come up regularly: some patients take their injection a day early rather than late, which is a separate question, taking Wegovy a day early follows slightly different logic. And if a full week or more has been missed, the guidance is more detailed still, see our page on missing a full week of Wegovy for that.

Keeping your schedule on track going forward

Consistency is the boring answer that actually works. Picking a day that fits your routine (not a Monday when you know weekends run late, for example) reduces the chance of repeat slippage. Some people set a phone alarm; others keep the pen somewhere visible in the fridge as a prompt. The pen itself is discreet enough: a slim pre-filled device that arrives in plain, unbranded packaging via DPD the next working day after clinical approval.

If you're injecting at home for the first time, or switching to a new pen format, the injection sites to use are the abdomen, thigh, or upper arm. Rotating the site each week reduces local reactions. Storage is straightforward, refrigerated between 2–8°C, though the exact window for room-temperature use is in your Patient Information Leaflet and varies by product.

For broader questions about your injection routine (timing, sites, what to do if a pen is damaged) our guide on missed Wegovy injections covers the practical detail. And if you're reconsidering whether Wegovy is still the right treatment for you, or want a prescriber to review your current dose and schedule, starting a free consultation is the easiest next step. A real clinician reads your responses the same day.