How to Give a Wegovy Shot Safely and Confidently

What the clinical guidance says before you begin

The NHS patient guidance for semaglutide and Wegovy's full Summary of Product Characteristics both make clear that correct technique reduces discomfort and the risk of injection-site reactions. Before your very first shot, read the leaflet inside the box from start to finish. It covers the exact steps, illustrations, and the storage rules that apply to your specific pen format. One practical point the leaflet raises: if your pen has come straight from the fridge, leaving it at room temperature for around 30 minutes before injecting can make the process more comfortable. Do not warm it in hot water or sunlight.

Wash your hands thoroughly with soap and water. Gather everything you need: your pen, an alcohol swab to clean the injection site, and a sharps container for safe disposal of the used pen afterwards. You do not need to attach a separate needle, the Wegovy pen has a built-in, covered needle system. Never reuse a pen or share one with another person.

Check the pen itself before you do anything else. The liquid inside should be clear or faintly colourless; do not use it if it looks cloudy, discoloured, or contains visible particles. Check the expiry date printed on the label. These two steps take about ten seconds and are worth making habitual.

Choosing and preparing your injection site

The three approved sites are the fatty layer of your abdomen (belly), the front of your thigh, or the outer upper arm. The NHS guidance is explicit that you should rotate your site with each injection, using exactly the same spot every week increases the chance of skin changes, including thickening or dimpling, that can reduce how well the medicine is absorbed.

Avoid injecting into skin that is bruised, tender, red, or has any kind of rash or scar tissue. If you're injecting into your abdomen, stay at least 5cm away from your navel. Clean the chosen area with an alcohol swab and let it dry fully before you inject, damp skin stings more. There's no need to pinch up a large fold of skin; a small, natural pinch is fine for most people, though the leaflet shows the correct grip for each site.

If you're new to this and want to see the technique demonstrated rather than described, a visual walkthrough of the Wegovy injection process can make the steps easier to follow the first time.

The injection itself: the step-by-step sequence

Remove the cap from the pen, there is usually a grey inner cap as well as an outer one; remove both. Do not recap the pen once the inner cap is off. Place the pen flat against your cleaned injection site, pressing it firmly so the pen sits flush with your skin. Press and hold the injection button (it may click) and keep holding it down. The injection is complete when the window on the pen shows the dose indicator has moved fully, which takes several seconds. Keep the pen pressed in place for a count of five to ten after the click, pulling away too quickly can mean some of the dose is lost.

Withdraw the pen at the same angle it went in. Do not rub the site afterwards. Place the used pen directly into your sharps container; never put it into your household recycling or a standard bin. Your local council or pharmacy can advise on collection points for full containers.

A note on timing: many people find it easiest to pick a fixed weekly day that fits their routine, a Sunday evening, for instance, or a weekday morning before the school run. The key is consistency. If you're looking for a full guide on how to give yourself a Wegovy injection, including what to do if you miss a dose, that page covers the process in detail, and you should also contact your prescriber if you're unsure, as missed dose decisions sit with your clinical team, not with general guidance.

Side effects to be aware of after your shot

The most common reactions in the weeks after starting Wegovy are gastrointestinal: nausea, loose stools, constipation, indigestion, and burping. These effects tend to be most noticeable in the first day or two after each injection and usually settle as your body adjusts, particularly after a dose increase. Injection-site reactions (mild redness, itching, or a small lump at the site) are also fairly common and generally pass quickly.

More serious symptoms require prompt medical attention. Severe stomach pain that spreads to your back, with or without vomiting, should not be waited out, this can be a sign of pancreatitis. In January 2026 the MHRA issued a Drug Safety Update specifically highlighting acute pancreatitis as a known but uncommon risk with GLP-1 medicines; you can report any suspected side effects through the MHRA Yellow Card scheme. Signs of a serious allergic reaction (swelling of the face or throat, difficulty breathing) also need emergency care straight away.

Questions about your dose, side-effect management, or whether your technique is right are exactly what our clinical team is here for. If you're considering starting Wegovy and want to understand whether it could be right for you, start your free consultation and a GPhC-registered prescriber will review your case the same day.