Wegovy injection frequency: how often is each dose taken?

Where the once-weekly schedule comes from

The weekly injection frequency is not arbitrary. Semaglutide's half-life (the time it takes the body to clear roughly half of a dose) is approximately one week. That pharmacokinetic property, confirmed in the drug's development programme, means a single weekly injection keeps blood levels stable enough to sustain appetite suppression and the slowing of gastric emptying throughout the whole seven days. Daily dosing would offer no advantage and daily injections would be harder to maintain; monthly dosing would leave gaps. The SmPC published on the Electronic Medicines Compendium (eMC) sets out the pharmacological rationale in detail.

The STEP 1 trial (68 weeks, 1,961 adults with obesity or overweight and at least one weight-related condition) used this once-weekly schedule throughout and reported an average body-weight reduction of around 15% at the 2.4 mg maintenance dose, published in the New England Journal of Medicine. Every participant injected on that consistent weekly schedule. Adherence to the timing was part of how those results were achieved.

There is a common assumption that taking an injection more frequently would speed results. It would not, and it would increase the risk of side effects, particularly the gastrointestinal ones that are already the most commonly reported. The dose and the interval are fixed together; changing one without the other is not how the medicine is designed to work.

The titration ladder and what each step is for

Wegovy does not begin at its maintenance dose. The licensed schedule, as described by the NHS medicines page for semaglutide, runs: 0.25 mg for the first four weeks, then 0.5 mg, 1.0 mg, 1.7 mg, and finally 2.4 mg as the standard maintenance dose, each step lasting a minimum of four weeks. Prescribers can slow the titration if side effects are troublesome.

The starting dose exists to let the body adjust. Nausea, the most commonly reported side effect, tends to be at its sharpest after a new or increased dose and usually settles over a week or two. Skipping rungs on that ladder (going straight to a higher dose) bypasses that adjustment period and tends to make side effects significantly worse without delivering faster weight loss. Your prescriber makes the call on when a step-up is appropriate; it is not something to judge from the scales alone.

From January 2026, a 7.2 mg dose option became available following MHRA approval. The dedicated single-dose 7.2 mg pen was approved on 14 April 2026 for adults with a BMI of 30 or above. The starting dose and titration approach remain the same, 0.25 mg initially, stepping up over several months. The injection frequency stays once weekly throughout. Whether the 7.2 mg option is suitable for a given patient is a clinical decision, not a self-referral choice. If you want to understand the broader picture of how Wegovy injections work, that page covers the mechanism in depth.

Picking your injection day, and what happens if you miss one

The day of the week is yours to choose. Many people pick a day that fits a reliable routine: the same evening before a rest day, or a morning when they are at home. Consistency helps, and linking it to something already habitual tends to work better than relying on memory alone. The injection can be given at any time of day.

If a dose is missed, the right action depends on how close the next scheduled dose is. The Patient Information Leaflet sets out the guidance precisely, and that is where readers should look, not an online article. The general principle, as described by the NHS, is that if more than five days have passed since the missed dose, skip it and resume on the usual day; if fewer than five days remain until the next dose, the missed one is omitted. Injecting twice in a single week to compensate is not advised. Missed-dose decisions that feel uncertain are worth a quick message to your prescriber rather than a guess.

For anyone considering Wegovy as a weight-management option and wondering about costs alongside the clinical picture, the Wegovy price page gives an honest account of what private treatment typically involves. And if you want a broader look at the range of options, the weight-loss treatments overview sets them out side by side.

Choosing your injection site and rotating it

Each weekly injection goes into the fatty tissue just beneath the skin, the abdomen, the outer thigh, or the upper arm are the three licensed sites. Rotating between sites, and between spots within a site, matters. Injecting repeatedly into the same small area can cause changes in the skin and underlying tissue that affect how the medicine is absorbed. The practical effect is that absorption becomes uneven, which can interfere with steady blood levels and, in turn, with how well the medicine works.

Rotation does not need to be complicated: working around a clock-face on the abdomen, or alternating thighs week by week, is enough. The injection technique itself (pinching the skin, inserting at the right angle, holding briefly) is covered in the Patient Information Leaflet that comes with every pen. Proper storage matters too: Wegovy pens are kept refrigerated between 2°C and 8°C, with a limited window for room-temperature use before a dose that is set out in the leaflet. Readers who want to learn more about the practical side of using the pen can find further detail on the Wegovy injection guide.

If anything about injection technique feels uncertain (site reactions, bruising, questions about disposal) our clinical team is available seven days a week. You can also read about semaglutide injections more broadly, or explore the full guide to what Wegovy injections involve. For safe disposal, a sharps container is the right way to discard used pens.

Wegovy is a prescription-only medicine. If you would like to explore whether it might be appropriate for you, a free consultation with our prescribers is the place to start, no waiting list, reviewed the same day by a real clinician.