Wegovy Pen: Everything Already-Prescribed Users Need to Know

Your Wegovy pen comes ready to use — there is no need to mix or reconstitute the semaglutide solution. Before each injection, take a moment to inspect the pen: the liquid should appear clear and colourless to slightly yellow with no visible particles. Always check the expiry date and confirm you are using the correct dose strength for your current stage of treatment, as directed by your prescriber.

Prepping and setting up the pen

When setting up your Wegovy pen for the first time (or after storage), the steps are straightforward: remove the pen cap, attach the needle as described in your Patient Information Leaflet (PIL), and check the dose window shows the correct amount. Your PIL is the definitive guide to technique — if anything about the process is unclear, your prescriber or a pharmacist can walk you through it in person. For a practical companion resource, the Wegovy pen overview on GLP Trackr covers the basics in plain language.

Injection sites and rotation

Wegovy is injected subcutaneously — into fatty tissue just under the skin — at the abdomen, the front of the thigh, or the upper arm. Rotating between sites each week is important: injecting into the same spot repeatedly can cause skin changes that affect how the medicine is absorbed. Keep a mental or written note of where you last injected, or let an app do it automatically (more on that below).

The click and the "golden dose" question

A common question is whether a pen contains a so-called "golden dose" — an extra amount beyond the labelled dose. The Wegovy 1.5 ml pen is filled to deliver the stated dose; any remaining volume after the dose window reaches zero is not intended for use and should not be injected. For certainty on what your specific pen contains, always refer to the patient information leaflet or the electronic Medicines Compendium (eMC), which holds the full prescribing information.

When the pen is not clicking

If your Wegovy pen is not clicking during injection, the most common causes are: the needle not being attached correctly, the pen being pressed against the skin at an angle rather than straight on, or the pen not being held firmly in place for the full injection time. Never force the mechanism. If the issue persists or you are unsure whether the full dose was delivered, contact your prescriber or pharmacist before your next scheduled dose. You may also find it helpful to read about what to do when your Wegovy pen needs resetting.

Storing and carrying your pen

Check your PIL for precise storage instructions — as a general guide, unused pens are typically stored in a refrigerator, while a pen in use can usually be kept at room temperature for a limited period. A dedicated pen case can protect the device from damage and temperature extremes when travelling. Always keep the cap on when not in use and keep pens out of reach of children.

If you use Mounjaro rather than Wegovy, the guide to priming the Mounjaro pen covers the equivalent steps for tirzepatide devices.

One of the easiest things to lose track of on a weekly injection schedule is where you last injected. GLP Trackr's injection-site tracking logs each site — abdomen, thigh, or upper arm — and suggests your next rotation automatically, so you never have to rely on memory alone. It takes seconds to record after each shot.

Alongside site rotation, the app lets you log the dose strength, date, and time of every injection, building a clear record of your treatment history. If you ever need to discuss your schedule or a missed dose with your prescriber, you have a precise log ready to share — far more useful than trying to recall dates from memory. The dose-reminder feature sends a gentle alert on your chosen injection day, so a dose is never simply forgotten in a busy week.

For a broader look at everything the app supports on your semaglutide journey, the Wegovy companion guide on GLP Trackr is a good starting point. And if you want to understand how GLP-1 medicines work more generally alongside other treatments, the Mounjaro and GLP-1 hub has comprehensive background.

Always follow the guidance of your prescriber or doctor — they know your full medical history and are the right person to advise on anything specific to your pen, your dose, or your injection technique. If a symptom, pen issue, or side effect is severe or persistent, contact your healthcare professional promptly. Any concerns about whether a dose was delivered correctly should be raised with your prescriber or pharmacist, not resolved by re-injecting.

Ready to bring your weekly injection routine together in one place? GLP Trackr is free to try for 7 days — download it on the App Store or Google Play and start logging your shots, tracking your rotation, and building a record you can actually use.