How to Inject Wegovy in Your Leg: A Step-by-Step Guide

Step 1: Prepare the pen and your skin

Take your Wegovy pen out of the fridge and leave it sitting at room temperature for around 30 minutes before you inject. This one step removes most of the stinging that people report, cold liquid under the skin is uncomfortable in a way that is easily avoided.

While you wait, wash your hands thoroughly with soap and water. Then clean the patch of skin on the front of your thigh where you plan to inject. An alcohol swab works well here, let the skin dry fully before the needle touches it, since wet skin can sting and slow absorption slightly.

Check the pen window. The liquid should be clear and colourless to pale yellow; you should not see particles or cloudiness. If anything looks unusual, do not use that dose, contact your prescriber and check the Patient Information Leaflet, which covers exactly this scenario. The leaflet is your definitive reference for storage, appearance checks and anything this guide cannot cover.

Step 2: Choose and prepare the correct part of your thigh

Site selection matters more than most people realise. The approved area is the front-facing surface of the thigh, think of it as the part that faces the ceiling when you are sitting down. Use the middle third of that surface: far enough from the knee to avoid bone, far enough from the hip to stay in fatty tissue rather than muscle. The inner thigh and outer thigh are not the right areas. A question our prescribers hear most weeks is whether the outer thigh counts, it does not for Wegovy; stick to the front.

Rotate which thigh you use each week, and within a thigh, shift the spot a couple of centimetres from where you injected last time. Hitting the same point repeatedly causes the fatty tissue to change texture over time, which affects how the medicine is absorbed. For a fuller breakdown of why site selection varies in different positions, the guide on choosing your injection spot in the leg goes into more detail.

Step 3: Inject and confirm the dose

Attach a new needle to the pen tip, twist until secure. Remove the outer and inner needle caps. Hold the pen at a 90-degree angle to your thigh. You do not need to pinch the skin unless you have very little body fat in that area; if you do pinch, do it gently and release before withdrawing the pen, not during.

Press the pen firmly against your skin and press the injection button. Hold it there for the count that the Patient Information Leaflet specifies, typically until you hear or feel a click and then a second click, confirming the full dose has been delivered. Lifting the pen too quickly is the most common reason for incomplete doses. Once you withdraw the pen, the needle cover should slide back automatically.

Discard the used needle and pen responsibly. A dedicated sharps container is the right disposal method, putting needles in household rubbish is unsafe and in most areas against local council guidance. Your pharmacy or GP surgery will usually accept filled sharps containers for disposal.

After your injection: what to expect

A small amount of redness or a raised spot at the injection site is normal and usually settles within an hour. Occasional mild bruising is also common, particularly in the first few weeks. These are covered in the NHS patient information on semaglutide, which is worth bookmarking as a reliable reference throughout your treatment.

Nausea is the side effect people ask about most, and it tends to be more pronounced in the first day or two after each injection, particularly after a dose increase. It is not specific to the leg site, it happens regardless of where you inject. Staying well hydrated and eating smaller portions can help. If nausea is severe or accompanied by persistent stomach pain that spreads to your back, get medical help promptly; the MHRA has highlighted acute pancreatitis as an infrequent but serious risk with GLP-1 medicines, and that symptom pattern warrants urgent attention.

If you are curious about how injecting into the thigh compares with the abdomen or upper arm, the thigh injection guide covers the clinical rationale for each site. For a broader look at the full injection process regardless of site, the general Wegovy injection walkthrough is a good companion read. And if the pen does not seem to have delivered the dose correctly, the guide on pen malfunctions explains what to check and when to contact your prescriber.

Wegovy is one of two GLP-1 medicines currently available through our weight-loss treatment options; if you are weighing up how semaglutide fits into the broader picture of injectable weight-loss medicines, the Ozempic and weight-loss injections overview explains which products are licensed for what purpose in the UK. For context on how Wegovy is priced privately, the cost guide sets out what a legitimate prescription typically involves.

If you are not yet a patient and want to explore whether Wegovy could be right for you, check your eligibility with our prescribers, the consultation is free, and a GPhC-registered clinician reviews every application the same day it is submitted.