How Often Do You Inject Wegovy for Weight Loss?

So it really is just once a week, how does that work day-to-day?

Yes, once a week, every week. You pick a day that suits you (Tuesday evening, Sunday morning, whenever fits your routine) and you stick to it. The Wegovy pen is a pre-filled, pre-set device, so there's no drawing up of liquid or calculating amounts. You inject into the skin of your abdomen, thigh or upper arm, press the button, and you're done.

If your chosen day genuinely doesn't work one week, you can shift the injection by a day or two in either direction, as long as you leave at least 72 hours between doses. For anything beyond that, the right move is to check with your prescriber rather than guess. The NHS semaglutide medicines page covers what to do if you miss a dose, and the guidance is clearer than most people expect.

One practical note worth flagging: the pen needs to live in the fridge (2–8 °C) between injections, but you can take it out for a short time before you use it. The Patient Information Leaflet that comes with your pen gives the exact room-temperature window, that detail matters and is worth reading before your first dose.

Rotate your injection site each week rather than using the same spot repeatedly. That reduces the chance of skin irritation building up over months of treatment.

Why does the dose increase rather than starting at full strength?

Wegovy's side effects are mostly gastrointestinal, nausea, loose stools, bloating and similar. They're common, particularly in the early weeks, but they're manageable and they tend to ease as your body adapts. Starting at the lowest dose (0.25 mg) gives your digestive system time to settle before the amount goes up.

The standard UK titration runs across five steps: 0.25 mg for approximately four weeks, then 0.5 mg, 1.0 mg, 1.7 mg, and finally 2.4 mg as the established maintenance dose. Some people move through those steps comfortably and on schedule. Others need a bit longer at a given level before their prescriber judges it right to go further, that's a clinical call, not a sign anything is wrong.

The full Wegovy overview explains the wider treatment picture, but the short version is this: the titration exists for your comfort, and rushing it doesn't improve results. The STEP 1 trial, published in the New England Journal of Medicine, found an average body-weight reduction of around 15% over 68 weeks at the 2.4 mg maintenance dose, that outcome was reached by following the gradual schedule, not by jumping straight in.

A newer 7.2 mg dose was approved by the MHRA in early 2026, with a dedicated single-dose pen approved on 14 April 2026. It follows the same bottom-up titration from 0.25 mg; the maximum dose is simply higher for those who are eligible and tolerating treatment well.

Can you change which day you inject, or skip a week?

Life doesn't always fit neatly around a fixed weekly schedule. A holiday, a procedure, or simply forgetting to pop the pen out of the fridge before you head out, these things happen. The rule of thumb is: if the missed injection is within five days of when you were due, take it as soon as you remember and carry on with your usual day the following week. If more than five days have passed, skip that dose entirely and resume on your next scheduled day. Never take two doses to make up for one you missed.

Changing your injection day permanently is straightforward as long as you keep at least 72 hours between the last dose and the new one. If you're uncertain about a specific situation, the FAQs on our site cover some common scheduling questions, and our prescribers are available seven days a week if you need a direct answer.

One thing worth noting: if you're exploring how Wegovy compares with the dosing rhythm of other weight-loss injections, our page on how often you inject Ozempic clarifies the overlap, Ozempic contains the same active ingredient but is licensed for type 2 diabetes rather than weight loss, so the context is different even where the mechanics look similar.

Does injecting once a week feel like enough, will it actually work at that frequency?

It's a fair question, especially if you're used to daily tablets. The once-weekly frequency isn't a compromise, it's how semaglutide was designed to work. The molecule has a long half-life in the body, meaning it stays active between injections and maintains a relatively steady effect on appetite and gastric emptying across the whole week.

Consistency matters more than frequency here. People who get the best results tend to inject on the same day reliably, keep up with their prescriber reviews, and pair treatment with the diet and activity changes the licence requires. A practical guide to taking Wegovy covers those habits in more detail.

The cost of Wegovy is worth understanding before you start, since private treatment is a meaningful ongoing commitment. Our prescribers review every repeat order clinically (this isn't a set-and-forget prescription) so if something about the schedule or your response isn't working, that review is the natural place to raise it.

If you'd like a prescriber to assess whether Wegovy fits your situation, start your free consultation. A real clinician reads every submission the same day; there's no algorithm involved.