I Missed a Week of Wegovy: the Facts and What Happens Next

The biggest misconception: one missed week does not undo weeks of treatment

Many people assume that missing a single injection means starting again from scratch. That is not how semaglutide works. Wegovy has a half-life of roughly one week, which means the medicine is still measurably active in your body for days after a skipped dose. Your appetite suppression fades gradually rather than cutting off overnight. If you want a fuller picture of what actually happens to your body during that gap, our guide on missing one week of Wegovy walks through the pharmacology in plain terms. You may notice hunger returning more noticeably towards the end of a missed week, but that is not the same as losing the ground you have gained.

The NHS medicines guidance on semaglutide confirms the five-day rule as the clinical threshold. Under five days since you were due: inject as soon as you remember, then return to your original weekly day as usual. Five days or more: leave it entirely and resume on your next scheduled day. These are not arbitrary numbers; they reflect the pharmacokinetics of the drug and are designed to keep your plasma levels stable without creating a spike from a double dose.

It is also worth remembering that most people miss doses for entirely ordinary reasons, a holiday, a bank holiday delivery delay, payday meaning the repeat arrived late this month. Life interrupts medication. The key is knowing the rule so you can act calmly rather than guess.

Why doubling up is the one mistake worth avoiding

The temptation when you realise you have missed a week of Wegovy is to take two injections close together to get back on track quickly. This is the most important thing not to do. Semaglutide produces its gastrointestinal effects in a dose-dependent way: nausea, vomiting, diarrhoea and stomach discomfort are most pronounced when the amount of drug in your system rises sharply. Two doses in quick succession recreates exactly the kind of spike that the gradual titration schedule is designed to avoid.

The titration schedule itself (starting at 0.25 mg and stepping up roughly every four weeks) exists precisely because the body needs time to adjust. If you want to understand why those steps matter, the full Wegovy dose schedule explains each stage and what to expect as the dose increases. That context helps explain why a sudden doubling would set your system back rather than forward.

If you experience any gastrointestinal symptoms that are severe or prolonged, the right response is always to seek medical advice promptly. The MHRA's Yellow Card scheme exists to report suspected side effects from any medicine, including semaglutide, and your reports help regulators monitor safety for everyone using these treatments.

What to watch for in the days after a missed dose

After a missed week of Wegovy, a few things may shift temporarily. Some people notice appetite returning more strongly in the second half of the missed week; this is the pharmacology working as expected and is not a sign that the medicine has stopped working for you. Resist the instinct to compensate by restricting food aggressively, maintaining steady, adequate nutrition alongside semaglutide treatment matters for muscle retention and energy, and is part of what using Wegovy safely and effectively involves over the longer term.

When you take your next dose (whether that is the make-up injection within five days, or your resumed scheduled injection) you may find the initial side-effect profile feels slightly more noticeable than usual, simply because your system has had a longer gap. This typically settles within a day or two. Our dedicated page on a Wegovy missed dose covers what to expect when you restart and when it is worth contacting your prescriber. If you are ever unsure whether your symptoms are within the expected range, your prescriber or pharmacist is the right person to ask.

It is also worth considering whether issues with partial doses played a role, if your pen did not fully inject, or if you are uncertain how much was delivered, that is a distinct situation from a clean missed week and deserves its own clinical input.

When to involve your prescriber rather than managing alone

A single missed injection, handled with the five-day rule, is something you can manage without contacting anyone. Several situations do call for a conversation with a clinician. If you have missed two weeks in a row, the guidance shifts: the two-week missed dose situation involves a different set of considerations, including whether a dose reduction is appropriate when you restart. Three or more weeks missed is a separate clinical question again, and a prescriber should advise before you resume any dose above the starting level.

A pattern of frequently missed doses is also worth discussing openly. It sometimes points to a practical barrier (delivery timing, injection anxiety, cost) that has a real solution, or occasionally to a medical reason that affects how your treatment is structured. There is no benefit in struggling quietly. If aftercare and clinical support matter to you in choosing where to get treatment, the way we work at nume is worth reading before you decide.

For anyone not yet on treatment who is considering Wegovy, starting with a free consultation means a GPhC-registered prescriber reviews your circumstances before any prescription is issued. That clinical relationship is also what makes ongoing support (including situations like a missed dose) something you can ask about with confidence.