How to Inject Your Wegovy Pen: What to Know and How to Track It

Wegovy (semaglutide) is a once-weekly subcutaneous injection — meaning it goes into the fatty tissue just beneath the skin, not into muscle. According to the electronic Medicines Compendium, the recommended injection sites are the abdomen (stomach area), the front of the thigh, or the upper arm.

Why site rotation matters

Injecting into the same spot repeatedly can cause the skin to become lumpy or hardened — a reaction called lipohypertrophy. Rotating your injection site each week helps avoid this and can support more consistent absorption of the medicine. Your prescriber or doctor can give you specific guidance on rotation that fits your individual circumstances.

Using your Wegovy pen

Wegovy comes in a pre-filled pen. While this page does not replace the patient information leaflet (PIL) supplied with your pen, the general steps are: allow the pen to reach room temperature as directed, check the liquid looks as expected, select your injection site, and follow the instructions in your PIL for administering the dose. If you have any questions about technique, your prescriber or a pharmacist is the right person to ask — they can walk you through it in person or point you to appropriate video resources.

If you are looking for a visual walkthrough, the manufacturer and some healthcare providers publish instructional videos. Search via your prescriber's recommended channels or the manufacturer's patient support materials rather than relying on unofficial sources.

Stomach injections specifically

The abdomen is a commonly chosen site because it typically has sufficient subcutaneous tissue and is easy to reach. If you inject in the stomach area, it is generally suggested to stay at least a few centimetres away from the navel — your PIL or prescriber will have the specific guidance for your pen.

For more on injection site choices in general, see our guide to injection site selection, which covers the principles that apply across GLP-1 pens. You may also find it useful to read about injecting Wegovy step by step for a broader overview, or compare notes with how Mounjaro injections work if you are familiar with both medicines.

Remembering which site you used last week — and whether it was left or right — is harder than it sounds when you are injecting once a week. GLP Trackr's injection-site tracking feature is designed to solve exactly this problem.

Each time you administer your dose, you log the site and side (for example, left abdomen or right thigh) directly in the app. GLP Trackr then tracks your rotation history and suggests which site to use next, so you never have to remember manually. Over time, this builds a clear record of where each injection went — useful if you notice any skin reactions and want to discuss them with your prescriber.

Alongside site tracking, the app's dose reminder feature means your weekly Wegovy schedule stays front of mind without relying on memory alone. You can also log the date, time, and dose strength of each injection, giving you a complete picture of your treatment that you can bring to prescriber appointments.

If you ever experience a reaction at an injection site — redness, swelling, or discomfort — log it in the side-effect tracker so you have a dated record to share with your healthcare professional. Any skin reaction that is severe, persistent, or worrying should be discussed with your prescriber or doctor promptly; GLP Trackr helps you record what is happening, but it is not a substitute for clinical advice.

For a broader look at managing your GLP-1 journey, visit our weight loss injections hub.

Keep your injection history organised and your rotation automatic — download GLP Trackr on the App Store or Google Play and explore it free for 7 days.