Why You Feel Like Wegovy Has Stopped Working (And What to Do About It)

You've been taking Wegovy for months, the weight was moving, and now it isn't

That experience (steady progress, then a wall) is one of the most common things prescribers hear from people on GLP-1 treatment. It tends to happen somewhere between months three and six, often after a dose increase has bedded in and before the next one is due.

The short explanation is that your body is defending itself. When you consistently eat less, your metabolism adjusts downward, it burns fewer calories at rest, produces hormones that increase hunger signals, and holds on to energy stores more tightly. This is not a Wegovy problem; it is a human biology problem. Semaglutide blunts appetite through GLP-1 receptors, but it cannot override every adaptive response the body mounts after sustained weight loss. The NHS medicines page for semaglutide notes that weight-loss medicines work alongside (not instead of) a reduced-calorie diet and increased activity, which matters more once adaptation kicks in.

A practical question worth asking: has your actual food intake crept back up without you noticing? Appetite suppression can feel less dramatic after the first few months at a stable dose, and portion sizes can quietly expand. If you recognise that pattern and want to understand what is driving it, our page on why Wegovy seems to have stopped working walks through the most common reasons in detail. That alone accounts for a lot of plateaus that feel like the medicine failing.

The dose question: are you at the level where Wegovy is doing its full job?

Wegovy's titration schedule exists for a reason. The earlier doses (0.25mg, 0.5mg, 1mg) are there to help your body adjust to the medicine; they are not the doses where the clinical trials recorded significant weight loss. The headline figure from the STEP 1 trial, published in the New England Journal of Medicine, was around 15% average body-weight reduction over 68 weeks, and that was at the 2.4mg maintenance dose.

If your weight loss has slowed and you are not yet at 2.4mg, or not yet at the highest dose your prescriber considers appropriate for you, a titration review is the obvious first step. Going up a dose is not automatic (your prescriber will want to know how you've tolerated the current one) but it is often the clinical explanation for a plateau that arrives early in treatment.

It's also worth reading our detailed look at what causes Wegovy weight loss to stop, which goes further into the dose-plateau relationship.

Storage, technique and timing: the easy things that quietly derail treatment

Wegovy pens need refrigerating. A pen left out too long, stored in a bag near a heat source, or affected by a freezer that ran too cold can degrade in ways you cannot see. The medicine arrives looking normal. It may not be working normally.

When you start with nume, your pen arrives via DPD the next working day in plain, unmarked packaging, kept within the cold chain for transit. After that, storage is your responsibility, and the Patient Information Leaflet carries the exact guidance on how long the pen can safely be kept at room temperature. Always check it. Many people don't.

Injection site matters too. Rotating between your abdomen, thigh and upper arm helps absorption stay consistent. Injecting repeatedly into the same spot can cause tissue changes that slow how reliably the medicine enters your system. And the timing (same day each week, as close to the same time as you can manage) keeps your semaglutide levels steady. Small deviations add up over months. For a closer read on technique and what else can affect how semaglutide behaves, our semaglutide resource has the detail.

When to speak to a prescriber rather than just waiting it out

A two-to-four week stall after a dose change is almost always normal. A plateau that has lasted more than six to eight weeks at a stable, appropriate dose (with no change in weight and no change in how hungry you feel) is worth reviewing clinically.

NICE's appraisal of semaglutide (Wegovy) sets out that if less than 5% weight loss is achieved after six months at the maintenance dose, continuing the medicine should be reconsidered. That is a clinical decision, made with a prescriber who can see your full picture: how long you've been on treatment, what dose you're at, what else is going on healthwise. It is not a conclusion to draw alone from a few weeks on the scales.

There are also practical alternatives worth understanding. Some people find that switching treatment changes their response, our page on Wegovy stopping working covers what the options tend to look like, and the broader question of whether Wegovy stops working over time examines the longer-term clinical picture. If you're wondering what comes after Wegovy, or what to do if you've already stopped taking it, stopping Wegovy is covered separately.

The right move if the plateau is persisting is a conversation, not a guess. Speak to our prescribers through a free consultation, and a GPhC-registered Independent Prescriber (a real clinician, reviewing your case personally) will work through what's most likely happening and what, if anything, should change.