How Wegovy dosage works: the titration schedule, why it starts low, and what to expect

Your first pen is in the fridge, and the dose feels almost trivially small, here's why that's deliberate

Most people starting Wegovy have the same thought when they see 0.25 mg on the box: surely this tiny dose won't do anything? It won't, at least not much in terms of weight loss. That's not a flaw in the design. The first four weeks of treatment are purely about letting your gut adapt to a new class of medicine. Semaglutide slows the rate at which food leaves your stomach, and at higher doses that effect is strong enough to cause real nausea, vomiting or reflux if your system hasn't been introduced gradually.

The 0.25 mg pen is the gentlest possible introduction. Keeping it in the fridge door alongside things you look at every day is a practical nudge, same day each week, same routine. After four weeks at 0.25 mg, a prescriber moves you to 0.5 mg, then 1.0 mg, 1.7 mg, and finally 2.4 mg, always with roughly a month at each level. There's a detailed look at what the 0.25 mg dose actually does if you want to go deeper on the science of that first step.

The NHS patient guidance on semaglutide confirms this step-up approach and explains that side effects are typically at their worst just after a dose increase, then ease off as your body adjusts. If side effects at any step are too disruptive, a prescriber may recommend staying at the current dose for an extra four weeks rather than pushing ahead.

What changes dose by dose, and when weight loss tends to build

Wegovy works by activating GLP-1 receptors in the brain and gut, reducing appetite, increasing feelings of fullness, and slowing gastric emptying. The clinical effect scales with dose: most people notice some reduction in hunger from around 0.5 mg or 1.0 mg, and there's a closer look at what happens at the 1 mg stage and whether it produces meaningful results for most people. The STEP 1 trial, published in the New England Journal of Medicine, found that adults on 2.4 mg semaglutide lost an average of around 15% of their body weight over 68 weeks alongside lifestyle changes, a figure reached only after the full titration period, not during it.

There is also a separate page covering how high Wegovy dosage goes, including what the MHRA's approval of the 7.2 mg dose means in practice. That higher dose is a genuine option for some adults with obesity, and the titration pathway to reach it continues from 2.4 mg under prescriber guidance.

Side effects across the titration are mostly gastrointestinal: nausea, constipation, reflux, loose stools, fatigue. They tend to cluster in the first few days after each step up, then settle. They are not a sign that something is wrong. If severe or persistent abdominal pain occurs (particularly pain that radiates to the back) that warrants urgent medical attention and a call to your GP, as it can occasionally signal pancreatitis. The Wegovy overview page covers the full side-effect picture in more detail.

The 2.4 mg maintenance dose, and what happens if progress stalls

Once you reach 2.4 mg and tolerate it, that's the standard maintenance dose under the UK licence. Most people stay here for the duration of their treatment. NICE guidance on semaglutide notes that if you haven't lost at least 5% of your starting weight after six months at the maintenance dose, your prescriber will review whether continuing is appropriate. That review isn't a failure point, it's a built-in clinical check to make sure the treatment is working for you specifically.

The 7.2 mg dose, approved by the MHRA in early 2026, sits above 2.4 mg on the same upward pathway and is intended for adults with a BMI of 30 or above. It's not a first-line option; it's reached by continuing the titration under a prescriber's instruction after 2.4 mg. Trials at 7.2 mg reported average weight loss of around 20.7% over 72 weeks, approaching the results seen with tirzepatide. If you want to understand how the full Wegovy dosage schedule is structured and what each stage involves, that page sets out the pathway in full. If you're curious how doses compare at different points, this page looks at which dose level produces meaningful results.

For anyone considering private treatment, understanding the cost context helps. Our treatment page sets out what's included in the price, and there's a wider look at weight-loss treatment options if you're still working out which route suits your situation. A prescriber, not a price list, should be the deciding factor, treatment that's titrated carefully and monitored properly is where the results come from.

How a prescriber manages your dosage at each repeat

The titration schedule isn't automatic. Each time you move to the next dose, or request a repeat at your current one, a prescriber reviews your progress, your side-effect experience, and any relevant changes to your health. At a service like ours, that review happens before every repeat, not as a formality, but as a genuine clinical check.

Patients who transfer from another provider, or who want to increase their dose, are asked to provide evidence of their current treatment. That's not bureaucracy, it protects you. A prescriber who doesn't know your history can't make a safe titration decision. Our clinical team applies these checks consistently, and the prescriber who reviews your notes is a GPhC-registered Independent Prescriber reading them personally.

If you have questions about your individual schedule (whether to stay at a dose longer, what to do after a missed injection, or whether the 7.2 mg option applies to you) those are exactly the kind of questions worth raising at consultation. Answers vary from person to person, and the FAQs cover some of the most common ones. When you're ready to talk it through with a prescriber, speaking to ours is straightforward and free.