Weight Loss Injections in Glasgow: What People Already on Mounjaro or Wegovy Need to Know

Both Mounjaro and Wegovy are administered as once-weekly subcutaneous injections — meaning they go just under the skin, not into muscle. The three areas most commonly used are the abdomen, the front of the thigh, and the upper arm. Rotating between these sites from one week to the next is recommended to reduce the chance of skin reactions or tissue changes building up in a single spot.

Why rotation matters

Using the same injection site repeatedly can lead to localised reactions — such as redness, bruising, or changes in the skin at that area. Spreading injections across different sites, and varying the exact spot within each area, helps keep skin healthier over time. Your prescriber or doctor can advise on the best approach for your individual circumstances.

What the injection involves

Both medicines come as pre-filled pens designed to make the process straightforward. The pen is pressed against the chosen site and activated. Always follow the instructions in the patient information leaflet that came with your specific pen — the exact steps can vary between devices, and your prescriber is the right person to walk you through technique the first time.

If you ever experience a severe or unusual reaction at an injection site — or anything that concerns you — contact your healthcare professional promptly. Any side effect you think may be related to your medicine can also be reported to your national reporting scheme (such as the UK's Yellow Card scheme).

For a broader overview of how these injections work and what to expect across your treatment, see our guide to weight loss injections.

Remembering which site you used last week — and exactly when you last injected — is harder than it sounds, especially once treatment becomes a routine. GLP Trackr's injection-site tracking logs each shot with the site you used, so the app can suggest your next rotation automatically. You never have to try to recall whether last week was the left abdomen or the right thigh.

Alongside site tracking, the app logs the date, time, and dose strength of every injection, building a clear record you can review at a glance. Gentle dose reminders mean your weekly schedule stays on track even during busy weeks — one of the most common reasons people fall out of routine is simply forgetting, and a nudge at the right time makes a real difference.

If you want to understand the cost side of your treatment, our page on weight loss injection pricing factors covers what influences what people pay, and our look at finding good-value weight loss injections may also be useful context — though GLP Trackr does not sell or supply any medication.

GLP Trackr is a companion app, not a medical service. Any decisions about your dose, your injection technique, or your treatment plan belong with your prescriber — the app helps you record what's happening so those conversations are more informed.

Ready to take the guesswork out of injection-site rotation? Download GLP Trackr on the App Store or Google Play and try it free for 7 days — your injection history, all in one place from day one.