Where to Inject Wegovy: the Three Sites and How to Use Them

The common misconception: any soft area will do

A question our prescribers hear regularly is whether Wegovy can be injected anywhere that feels comfortable, a shoulder, the side of the hip, even the lower back. The short answer is no. The three sites in the licence exist because clinical trials and pharmacokinetic studies confirmed that subcutaneous tissue in the abdomen, thigh and upper arm absorbs semaglutide reliably and predictably. Other areas have not been studied in the same way, and absorption from untested sites may vary. Sticking to the licensed sites is not a formality; it is how the trial data you read about was actually generated.

There is a related myth worth clearing up: that injecting into muscle (intramuscular injection) gets the medicine working faster. It does not, and it is incorrect technique for Wegovy. Subcutaneous injection, where the needle sits in the fatty layer just beneath the skin, is what the medicine is designed for. Pinching the skin gently before inserting the needle helps ensure you stay in that layer, particularly on leaner areas like the thigh. The NHS semaglutide medicines page covers the basic technique, and your Patient Information Leaflet goes further.

The abdomen, thigh and arm: what makes each site work

The abdomen is the go-to for most people. Aim for the area roughly two inches either side of your navel, avoiding the navel itself and any scar tissue. There is usually enough subcutaneous fat to make the injection straightforward, and you can see exactly what you are doing. Some people find this the least uncomfortable site, especially in the first few weeks of treatment.

The front of the thigh is a reliable second choice and easy to reach without contorting. If you want to explore exactly where on the thigh to inject Wegovy, a dedicated guide walks through the landmarks in more detail. The upper outer arm, meanwhile, is harder to self-administer accurately (it is much easier with a second person helping, or with a mirror) but it is a useful option if you want to give your abdomen and thigh a longer rest. A closer look at arm injection technique for Wegovy is worth reading before you try it the first time.

Rotate systematically. If you inject into your abdomen this week, move to the thigh next week, or at minimum choose a different spot within the same site. Repeatedly injecting into the same point can cause localised skin changes that affect absorption.

Preparation, aftercare and a note on storage

Clean the skin with an alcohol swab and let it dry fully before injecting, wet skin can sting and the alcohol needs a moment to do its job. Pre-saturated alcohol swabs make this easy to keep consistent. Insert the needle at a 90-degree angle for most people; those with very little subcutaneous tissue may be advised to use a 45-degree angle, but your prescriber or the Patient Information Leaflet is the right authority on that call.

After injecting, do not rub the site. A brief firm press with a clean piece of gauze is fine. Dispose of the used needle safely, a sharps container is the correct way to do this and a legal requirement; used pen needles must never go into household bins.

Storage is closely linked to injection confidence: a pen that has been left at the wrong temperature may not work as expected. The rules around how and where to store Wegovy are set out in the SmPC and are worth reviewing before your first pen arrives. When you order through a registered pharmacy, the pen comes tracked by DPD in plain, unbranded packaging, knowing it has been kept cold throughout the journey is part of what the cold chain guarantee means in practice.

If you are curious how Wegovy's injection sites compare with those for other semaglutide formulations, the guide to semaglutide injection sites covers the full picture. For anyone specifically asking about leg injection for Wegovy, that page goes into more depth on the thigh technique.

When to ask your prescriber rather than a general guide

General educational content, including this page, is no substitute for the clinical relationship that comes with a Wegovy prescription. If you notice a lump, prolonged redness or any hardening under the skin at a previous injection site, tell your prescriber before your next dose. Similarly, if you have a skin condition, recent surgery or scarring near any of the three sites, the prescriber needs to know before you settle on a rotation plan.

Wegovy is a prescription-only medicine under UK law, and every course requires clinical assessment. The full Wegovy overview explains the eligibility criteria and what the treatment involves, while information on weight-loss treatments more broadly helps put injectable options in context. For questions about cost, the Wegovy price comparison guide gives an honest breakdown of what private treatment typically includes. The NHS England guidance on weight-management injections is also worth reading for context on how Wegovy sits within the wider clinical framework.

If you are ready to find out whether Wegovy is clinically suitable for you, a prescriber at nume can review your consultation the same day. Check your eligibility and get started with a free, no-obligation assessment.