Wegovy (Semaglutide): A Guide for People Already on Treatment

Semaglutide works by mimicking a naturally occurring hormone called GLP-1 (glucagon-like peptide-1), which plays a role in regulating appetite and blood sugar. Many people prescribed Wegovy report a noticeable reduction in hunger and a quietening of what is often described as "food noise" — the persistent mental preoccupation with eating. Slower stomach emptying is also commonly reported, which contributes to a feeling of fullness after smaller amounts of food.

Wegovy is supplied as a pre-filled pen and is injected once a week, typically into the abdomen, thigh, or upper arm. Dose titration — starting low and increasing gradually — is guided by your prescriber or doctor, not something to adjust on your own. The dose stages typically referenced are 0.25 mg, 0.5 mg, 1 mg, 1.7 mg, and 2.4 mg, though your individual schedule is a matter between you and your prescriber.

Commonly reported side effects include nausea, constipation, diarrhoea, indigestion, fatigue, and headache — particularly in the early weeks or after a dose increase. These often ease over time, but if any symptom is severe, persistent, or concerns you, contact your healthcare professional promptly. Any suspected side effects can also be reported to your national reporting scheme (such as the UK's Yellow Card scheme) or equivalent in your country.

For a detailed factual overview of semaglutide, the electronic Medicines Compendium (eMC) holds the full prescribing information and patient leaflet for Wegovy.

If you are also interested in how another GLP-1 medicine compares, our Wegovy and semaglutide overview covers the broader context, and you can read about Mounjaro (tirzepatide) as a point of reference — though any question about which medicine is right for you belongs with your prescriber.

Staying consistent with a weekly injection schedule, managing side effects, and understanding your own progress are the parts of GLP-1 treatment that benefit most from good record-keeping — and that is exactly what GLP Trackr is built for.

The most immediately useful feature for Wegovy users is dose and injection logging: every shot is recorded with the date, dose strength, and injection site, so you always have a clear, timestamped history. The app also tracks injection-site rotation, suggesting your next site based on your recent history, which takes one decision off your plate each week. Dose reminders mean a weekly injection is far less likely to slip your mind.

Alongside that, side-effect tracking lets you log symptoms like nausea, fatigue, or digestive changes and see how they pattern over time — genuinely useful information to bring to a prescriber appointment rather than trying to recall it from memory. The doctor report feature turns your logged data into a clear summary you can share.

GLP Trackr also supports your Wegovy experience with food logging (including AI photo scanning), weight tracking, and daily check-ins for mood, energy, and sleep — so your progress picture is complete, not just the number on the scale. You can also connect with others on a GLP-1 journey in the community, which many people find genuinely helpful during treatment.

GLP Trackr is a companion tracking tool, not a medical service — it helps you stay organised and informed, but it is not a substitute for the guidance of your prescriber or doctor, who knows your full history and clinical picture.

Ready to bring your weekly 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 from your very first dose.