How often should you take semaglutide, and what shapes that decision?

Why once a week, and why the same day matters

The weekly rhythm isn't arbitrary. Semaglutide is engineered with a fatty-acid side chain that binds to albumin in your blood, slowing its clearance and keeping it active for roughly seven days. That pharmacology is what made once-weekly dosing possible in the STEP 1 clinical trial, in which participants took a single subcutaneous injection each week for 68 weeks, and it's why the licence is written the way it is. Choosing a consistent day each week (Monday evenings, say, or Sunday mornings) keeps your levels stable and makes the habit easier to maintain. The day itself doesn't matter medically; the regularity does.

If you want to shift your injection day (because your routine has changed) you can, as long as at least four days have elapsed since your previous dose. The guidance on when to take semaglutide covers the timing rules in more detail. Beyond the day-of-week question, the injection can be given at any time of day, with or without food. That flexibility is one of the things patients often say made the routine manageable.

The staged titration: why your dose changes before it settles

Taking semaglutide once a week is consistent throughout treatment. The dose, however, is not fixed from day one. The UK licensed schedule for Wegovy moves through five steps: 0.25 mg, then 0.5 mg, then 1.0 mg, then 1.7 mg, and finally 2.4 mg, each held for approximately four weeks before the prescriber reviews whether to increase. The newer 7.2 mg maintenance dose, approved by the MHRA in January 2026 and available as a dedicated single-dose pen from April 2026, adds a further option for eligible adults with a BMI of 30 or above.

The low starting dose isn't about caution for its own sake. Gastrointestinal side effects (nausea in particular) are most common when semaglutide first begins slowing gastric emptying. Starting at 0.25 mg gives your body several weeks to adapt before the dose that actually produces meaningful weight change is introduced. This is worth understanding because some people feel impatient when the early weeks produce modest effects; that's the titration working as intended. The semaglutide overview page explains the mechanism behind appetite reduction in more detail. Your prescriber will make the call on each increase based on how you're tolerating the current dose, not on a fixed calendar alone.

If side effects are significant at a given step, a prescriber may pause titration and stay at the current dose for longer. That is a clinical decision, not a treatment failure. Stopping and restarting, or increasing faster than licensed, should never be done without guidance.

What happens if you miss a dose or need to stop temporarily

Life intervenes. A missed dose is common and manageable within specific limits: if fewer than five days have passed since your scheduled injection, take the missed dose as soon as you remember and continue your usual weekly day. If more than five days have passed, skip it and carry on from your next scheduled dose. Never take two doses to make up for a missed one. These rules are in the Patient Information Leaflet and, frankly, are the kind of detail worth reading once and keeping to hand rather than trying to recall from memory.

Longer interruptions (illness, a surgical procedure, pregnancy considerations) are a different matter. Surgery in particular requires that your anaesthetist and surgical team know you're taking a GLP-1 medicine; NHS England guidance is clear on this point. If you're planning an elective procedure, speak to your prescriber well in advance. The frequency questions people ask about semaglutide often centre on exactly these edge cases, and they're best answered by a clinician who knows your history.

One thing our prescribers hear fairly often: people who've read about Wegovy online and feel uncertain whether the weekly routine will actually fit their life. That hesitation is completely reasonable. If you're weighing it up, the considerations around whether Wegovy suits you may be a useful read before you decide anything.

Frequency for the oral tablet: a different daily rhythm

If your question is specifically about semaglutide tablets rather than the injection, the answer changes. Wegovy tablets (approved by the MHRA on 11 June 2026 as the first oral GLP-1 medicine licensed in the UK for weight management) are taken once daily, not once weekly. The dosing ladder for the tablet runs from 1.5 mg up through 4 mg and 9 mg to a 25 mg maintenance dose, with at least one month at each level.

The daily tablet comes with stricter timing rules than the injection. It's taken first thing in the morning, on an empty stomach, with a small amount of plain water (no more than around 120 ml), and you wait at least 30 minutes before eating, drinking anything else, or taking other oral medicines. The absorption enhancer in the formulation requires that window. There's no refrigeration needed, which matters for people comparing the injection and tablet forms of Wegovy on practical grounds. A dietitian's question worth considering alongside the NHS information on semaglutide on the NHS medicines pages is whether daily morning adherence or weekly injection adherence fits better with how your week runs, that's a genuine individual difference, and worth raising with your prescriber.

For context on the cost of private treatment across both formats, the Wegovy price comparison page sets out what the market looks like at the moment. If you're ready to talk through which option fits your situation, starting a free consultation with our prescribers is the natural next step, no commitment, and a real clinician reviews your answers the same day.