How often do you take Wegovy, and what does the schedule actually look like?

Why once a week? What the licensed schedule is built on

The STEP 1 trial, published in the New England Journal of Medicine, ran participants on once-weekly semaglutide 2.4 mg for 68 weeks and recorded an average body-weight reduction of around 15%. That evidence base underpins the UK licence, and the once-weekly timing reflects semaglutide's pharmacology: the molecule binds to albumin in the bloodstream, which slows its clearance and stretches its activity across a full seven days. If you want to understand how often you can take semaglutide, the short answer is that taking it more frequently would not improve results, while taking it less frequently would leave gaps in coverage. The licence is clear, one injection per week, same day each week where possible. Novo Nordisk and the prescribing SmPC both describe this as non-negotiable to the mechanism, not just a convenience choice.

Practically, most people pick a day that fits naturally into their week. Some prefer a Sunday morning before plans fill the day; others anchor it to a gym session. The pen lives in the fridge door, and a quick phone reminder on the chosen day keeps the schedule on track. Consistency matters more than which day you pick.

The dose escalation ladder, from 0.25 mg to maintenance

One injection a week does not mean the same dose every week from the start. The UK-licensed Wegovy schedule begins at 0.25 mg and steps up through 0.5 mg, 1.0 mg and 1.7 mg before reaching the 2.4 mg maintenance dose, with roughly four weeks at each level. Those lower doses are not therapeutic targets; they exist to reduce the nausea and other gastrointestinal effects that a full dose would cause if given from day one. Think of the escalation as the medicine earning your trust before it does its main work.

In January 2026 the MHRA also approved a higher 7.2 mg maintenance dose, and a dedicated single-dose 7.2 mg pen received approval in April 2026. Trials reported around 20.7% average weight loss over 72 weeks at that dose. Whether you reach 2.4 mg or progress further is a clinical decision. You can read more about Wegovy's full profile, including the evidence behind each dose level. No specific dose or pen format is guaranteed to be in stock at any given time; a prescriber confirms availability at consultation.

What happens if you miss a dose or want to change your day

Life happens. The NHS guidance on semaglutide sets out the rule plainly: if fewer than five days have passed since your missed dose, take it as soon as you remember, then return to your usual weekly day. If five days or more have passed, skip that dose entirely and continue on your normal schedule the following week. Never take two doses in one week to compensate. Doubling up raises the risk of side effects (especially nausea, vomiting and diarrhoea) without adding benefit.

Shifting your injection day is possible in principle: take the missed or rescheduled dose, then count seven days forward to set the new day. Your prescriber or pharmacist should confirm this before you make the change. The practical guide to Wegovy injection timing covers this scenario in more detail, and the nume FAQs address common scheduling questions too. One question our prescribers hear regularly is how often you use Wegovy when you want to shift your day by a couple of days to avoid a holiday or appointment, and the answer is that short, occasional shifts are generally fine, while frequent changes to the pattern are not recommended and should be discussed with whoever manages your prescription.

Side effects linked to dosing frequency and what to watch for

The once-weekly rhythm means side effects tend to cluster in the day or two after each injection, particularly in the early weeks or after a dose step-up. Nausea is the most commonly reported; constipation, loose stools, reflux and fatigue are also documented in the clinical record. These effects are typically most noticeable immediately after starting or increasing the dose, then settle as the body adjusts. The gradual escalation schedule exists precisely to soften this curve.

Serious effects are less common but important to know. In January 2026 the MHRA issued a Drug Safety Update highlighting acute pancreatitis as an infrequent but potentially serious side effect of GLP-1 medicines: severe, persistent stomach pain that may spread to the back, with or without vomiting, is a reason to stop the injection and seek urgent medical attention. You can report suspected side effects through the MHRA Yellow Card scheme. Any concerns about whether your dosing schedule is causing unwanted effects are best raised with your prescriber before adjusting anything yourself. For context on how Wegovy fits into the broader landscape of weight-loss treatment, the weight-loss treatment overview explains the options available in the UK. If you are curious about what private treatment costs in practice, Wegovy pricing in the UK sets out the current picture honestly.

Wegovy is a prescription-only medicine. If you would like a clinical assessment to see whether it is suitable for you, check your eligibility with our prescribers.