How to inject Wegovy in your thigh: a step-by-step guide

What clinical guidance says about injection sites

The Wegovy Summary of Product Characteristics (SmPC), available on the electronic Medicines Compendium, identifies the abdomen, thigh and upper arm as the three approved sites for subcutaneous injection. The NHS semaglutide guidance reflects the same positions. There is no clinical evidence that one site produces meaningfully different absorption in most people, so the choice typically comes down to personal comfort and convenience.

The thigh works well because the subcutaneous tissue in the outer portion is accessible without contorting your body, and our guide to Wegovy injection in the thigh explains exactly why this site suits so many people. The inner thigh and the area close to the knee are both off-limits, too much muscle in the first case, too little cushioning in the second. Stick to the outer, middle third. That is roughly the zone between mid-thigh and a hand's width above the knee.

A common belief is that injecting into muscle is more effective. It is not, it is simply more painful, carries a higher risk of bruising, and bypasses the subcutaneous layer the pen is designed to reach. Subcutaneous delivery is the licensed route; muscle is not the target, and the angle of injection should reflect that.

Preparing to inject Wegovy in your thigh

Remove the pen from the refrigerator and allow it to reach room temperature for around 15–30 minutes. Cold semaglutide is more viscous and can cause stinging; warming it briefly makes the injection noticeably more comfortable. Do not shake the pen or warm it using a microwave or hot water.

Check the label: confirm it is your pen, the correct dose your prescriber has prescribed, and that the liquid inside appears clear and colourless. Do not inject if it looks cloudy, discoloured or contains visible particles. Remove the pen cap only when you are ready. If you use alcohol swabs, clean the injection site and allow the skin to dry fully before proceeding, injecting through wet skin stings more than the injection itself.

Sit on a chair or bed with your thigh relaxed. Tensing the muscle makes subcutaneous injection harder; a relaxed thigh gives you better access to the fat layer. If you are slim and lack much subcutaneous tissue, lightly pinching the skin and underlying fat before pressing the pen in helps ensure the medication goes to the right place, and our detailed walkthrough on how to inject Wegovy into the thigh covers this technique step by step. Your prescriber or the Patient Information Leaflet can confirm the right approach for your build.

The injection itself and what to do afterwards

Press the base of the pen firmly against the skin at a 90-degree angle until you feel it click. Hold it in place for the full count indicated in your leaflet (typically around ten seconds) before removing the pen. Lifting it too soon can interrupt delivery. You will see the yellow indicator in the window confirm that the full dose has been released.

Do not rub the site afterwards; rubbing can disperse the medicine unevenly under the skin. A little redness, a small raised bump or very mild discomfort at the site is normal and usually settles within an hour. Bruising occasionally happens, especially if a small blood vessel was nicked. It is harmless and fades.

Dispose of the used pen in a proper sharps container; do not place it in household recycling or general waste. Your local pharmacy or council will advise on collection. Once a pen has been used, it locks automatically and cannot be reused.

Rotate sites each week. Our page on choosing where on the thigh to inject Wegovy covers site mapping in more detail if you want a visual breakdown, while our guide to injecting Wegovy in the thigh brings together practical tips on position, pinching and rotation in one place. For broader context on Wegovy as a treatment, the Wegovy overview is a good starting point.

Side effects to watch for after a thigh injection

The most frequently reported side effects of semaglutide are gastrointestinal: nausea, loose stools, indigestion and reduced appetite are typical around dose increases, then tend to settle. These are not specific to the thigh site; they reflect the medicine's action rather than the injection location.

Local reactions (mild tenderness, slight swelling or temporary redness at the thigh site) are generally short-lived. If you are unsure whether you are targeting the right area, our page on how to inject Wegovy in the upper thigh explains precisely which zone to aim for and how to avoid common positioning mistakes. Persistent hardness or lumps under the skin at the same spot usually signal that you have not been rotating sites adequately. Move to a different area next week.

A small number of people experience serious side effects that warrant prompt medical attention. Severe, persistent stomach pain that radiates to the back, with or without vomiting, may indicate pancreatitis and needs urgent assessment; the MHRA issued a Drug Safety Update in January 2026 specifically highlighting acute pancreatitis as a known, infrequent but serious risk with GLP-1 medicines. Signs of an allergic reaction (swelling of the face or throat, difficulty breathing, rapid heartbeat) are also a reason to call 999 without delay. You can report any suspected side effect through the MHRA Yellow Card scheme.

If you are considering starting treatment or have questions about technique, the team at our pharmacy can help. For a broader look at injection-based weight-loss options, our weight-loss treatment overview sets out what is currently licensed in the UK. When you are ready, you can speak to our prescribers about whether Wegovy is right for you.