Making the most of your time on Wegovy

You've injected your first dose — now what?

Picture the scene: it's Sunday evening, you've done your first injection, and you're wondering whether to change anything tomorrow or wait to see how you feel. The short answer is: start the habits now, before appetite falls and routine shifts. Wegovy's active ingredient, semaglutide, slows how quickly your stomach empties and signals fullness to your brain. That effect builds over the titration weeks, so the window between your first dose and full effect is exactly when lifestyle foundations are easiest to set.

Start by logging what you eat for a week, not to restrict harshly, but to see where protein is thin. Many people on GLP-1 treatment find their appetite falls so sharply that they're eating far below what their body needs to hold onto muscle. Aim for protein at every meal: eggs in the morning, chicken or lentils at lunch, fish or beans in the evening. The NHS's healthy eating guidance frames it well: food quality matters more than hitting an exact calorie target.

Movement is worth beginning early too. A 20-minute walk after dinner costs you little and supports the metabolic changes the medicine is driving. Resistance exercise (bodyweight circuits, light weights, bands) is especially valuable; it is the single best way to stop weight loss coming mainly from muscle rather than fat. You don't need a gym. You need to move in a way you'll still be doing in six months. For a fuller picture of what to do while taking Wegovy, including how to build habits that work alongside the medicine, our dedicated guide covers the practical detail. For more on how semaglutide supports weight loss, the semaglutide overview on our site covers the mechanism in plain language.

What to eat (and what tends to cause trouble)

Wegovy reduces how much you want to eat, but it doesn't choose what you eat. High-fat meals empty the stomach even more slowly than the medicine already does, which often means prolonged nausea, reflux, or feeling uncomfortably full after only a few bites. Fatty takeaways, pastries and creamy sauces tend to be the first things people quietly drop once they're on treatment, not out of discipline, but because the body tells them to.

Fibre deserves a mention too. Constipation is a common side effect, and eating plenty of vegetables, wholegrains and pulses keeps things moving. Drink water consistently through the day rather than in large amounts at mealtimes, which can worsen bloating. For information on what specifically to steer clear of, the page on what to avoid while taking Wegovy goes into more detail.

Alcohol is worth handling carefully. It doesn't interact with semaglutide at a pharmacological level, but it intensifies the nausea and dizziness some people feel, particularly in the early dose weeks. A glass of wine on a Friday is unlikely to cause a problem for most people; drinking heavily is likely to make you feel genuinely unwell.

If questions come up about fasting protocols or time-restricted eating while on treatment, the answer is more nuanced than a simple yes or no. Our page on fasting while on Wegovy covers what the evidence currently suggests.

Managing side effects without stopping treatment

Nausea, loose stools, constipation, burping, the GI side effects of Wegovy are real, and they catch people off guard even when they've been warned. They typically peak in the days after a dose increase, then ease as your body adjusts. The titration schedule exists precisely for this reason: moving through the dose steps slowly, with a prescriber's oversight, gives your system time to settle. NHS England's guidance on weight-management injections stresses the importance of support alongside treatment for exactly this reason.

Practical things that help: eating smaller portions more frequently, avoiding lying down immediately after eating, and not skipping meals entirely even when appetite has gone. Skipping meals might feel fine in the short term but often makes nausea worse on an empty stomach rather than better.

Dehydration is the side effect most likely to need prompt attention. If vomiting or diarrhoea is persistent, keep sipping fluids and contact a clinician if you can't keep water down. For anything severe (particularly persistent stomach pain that spreads to the back) seek medical help the same day rather than waiting. The MHRA highlighted acute pancreatitis as a known, though infrequent, risk across GLP-1 medicines in their January 2026 Drug Safety Update.

One thing our prescribers hear regularly: people stopping treatment during a difficult dose week without telling anyone, then struggling to restart. If a dose step feels unmanageable, talk to a prescriber before stopping. There may be a case for pausing titration or reviewing what's happening. That's what the support team at nume is there for, seven days a week.

Keeping the weight off as the weeks go on

Around week four or five, some people notice the scale stalling even though nothing obvious has changed. Weight loss on Wegovy is rarely perfectly linear. Plateaus are normal and usually temporary; they're often connected to fluid retention, changes in activity level, or eating habits that have drifted without being noticed. This is a good moment to revisit food logging, check protein intake, and make sure strength activity hasn't slipped.

It's also worth knowing that weight can creep back if the medicine is stopped abruptly without a maintenance plan. NICE's appraisal of semaglutide notes that Wegovy is recommended for use for a maximum of two years within NHS specialist services, so any longer-term plans should involve a clinical conversation, not an assumption that the medicine runs indefinitely. On a private prescription, the plan beyond two years is something to discuss with your prescriber as you go.

Some people also worry about weight returning if a dose is missed or supply is disrupted. The page on weight gain risk while on Wegovy addresses this directly. Exploring your weight-loss treatment options more broadly can also be useful if you're thinking about what comes next.

If you're weighing up costs alongside clinical considerations, the Wegovy pricing page sets out the honest picture of what private treatment involves in the UK.

Ready to have a proper clinical conversation about your treatment? Speak to our prescribers through a free consultation, reviewed the same day by a real clinician, not a bot.