At what dose does Wegovy start working — and what should you expect along the way?

Why does Wegovy start at such a low dose if it's not working yet?

The 0.25 mg first dose exists entirely for your comfort. Semaglutide slows stomach emptying and raises gut-hormone signals involved in appetite, useful effects, but ones that can cause nausea, bloating or indigestion if they hit full-strength from day one. Starting low gives the body a chance to adapt before the dose climbs.

That said, "not working yet" isn't quite right. The medicine is active at 0.25 mg; the gut receptors are responding. What's lower is the magnitude of appetite suppression at that concentration. The full Wegovy dosing schedule describes each step (0.25 mg, 0.5 mg, 1.0 mg, 1.7 mg, 2.4 mg) and most prescribers hold each level for about four weeks before the next increase, provided it's tolerated well.

Some people do notice reduced hunger even in the first two or three weeks. Others feel little change until 0.5 mg or 1.0 mg. Both patterns are common. Neither means the medicine is failing you; individual response to GLP-1 receptor agonists varies, and the titration schedule exists precisely to bring everyone through safely. The Wegovy overview page covers the broader mechanism if you'd like more on how semaglutide works.

At what dosage does Wegovy start producing noticeable weight loss?

For most people, the clearest shift happens around 0.5 mg to 1.0 mg, when appetite reduction becomes harder to ignore. Meals feel smaller, the pull toward snacking fades, and total calorie intake tends to fall, often without conscious effort. That's the GLP-1 effect in practice.

Weight loss at this stage is real but modest. It accumulates meaningfully at the 1.7 mg and 2.4 mg levels, where the medicine is working at full therapeutic strength. The STEP 1 trial, published in the New England Journal of Medicine, recorded around 15% average weight reduction over 68 weeks at 2.4 mg alongside lifestyle changes, a figure that reflects months of treatment at maintenance, not weeks at the starter dose.

If you're partway through the titration and wondering whether progress is on track, the pages on 0.5 mg not feeling effective and 1 mg not working cover what's normal at each step and when it's worth raising the question with your prescriber.

What does working actually look like at each dose step?

Progress isn't linear, and the experience shifts as the dose climbs. Here's how the stages tend to feel in practice.

0.25 mg: Appetite may feel slightly quieter, but the main job is adjustment. Side effects, if any, are usually at their most noticeable here and tend to settle within a week or two. Many people find it helpful to keep the pen in the fridge door where they'll see it on injection day, routine matters when you're building a weekly habit.

0.5 mg to 1.0 mg: This is typically where hunger patterns shift more clearly. Portion sizes often fall naturally. Weight loss begins to show, though slowly. The 1 mg stage is sometimes where people question whether Wegovy is working, the answer is almost always that the full effect is still building.

1.7 mg to 2.4 mg: The maintenance territory. Appetite suppression is at its strongest, and weight loss tends to be most consistent. NICE's appraisal of semaglutide (TA875) considers the 5% weight-loss threshold at maintenance a useful clinical marker, if that isn't reached after six months at the highest tolerated dose, continuing is reviewed with the prescriber. Questions about 2.4 mg not feeling effective are covered in their own page.

How long does it take before Wegovy is really working?

Patience with the timeline matters here. Reaching 2.4 mg typically takes around 16 weeks of dose escalation, and significant weight loss accumulates over months beyond that, not days. The question of how many doses it takes to see meaningful loss gets a thorough answer elsewhere, but the honest short version is: the titration phase is a prerequisite, not a delay.

Some people also reach a dose that is the highest they tolerate well, rather than the highest on the schedule. That is still a valid maintenance dose, and the prescriber's role is to identify where your individual balance of effect and tolerability sits. Comparing your early weeks against trial averages at 2.4 mg isn't a fair test. At what dose Wegovy starts working for weight loss, in the meaningful clinical sense, is a question that really resolves over the full treatment arc.

If you'd like to explore whether Wegovy or another licensed weight-loss treatment might suit your situation, a free consultation with our prescribers is the place to start. There's no obligation, and the clinical review takes place the same day.