The Names Behind the Injections: Mounjaro and Wegovy
Both medicines are known by a brand name and an active substance name — it is worth knowing both, as your prescriber or pharmacist may use either.
Mounjaro (tirzepatide)
Mounjaro is the brand name; tirzepatide is the active substance. It acts on two appetite-regulating pathways — GLP-1 and GIP receptors — which is why it is sometimes described as a dual-action receptor agonist. It is supplied as a pre-filled pen and taken once a week by injection under the skin. Mounjaro carries a black triangle (▼) symbol, meaning it is subject to additional monitoring; any side effects should be reported to your healthcare professional and your national reporting scheme (such as the UK's Yellow Card scheme).
Wegovy (semaglutide)
Wegovy is the brand name; semaglutide is the active substance. It acts on GLP-1 receptors and is also taken once a week as a subcutaneous injection using a pre-filled pen. Like Mounjaro, it carries the black triangle symbol and the same reporting guidance applies.
What these medicines are not
Neither Mounjaro nor Wegovy is insulin, and neither is a cosmetic quick fix. They are prescription-only medicines, meaning suitability and dosing are determined entirely by your prescriber — not something to be self-adjusted. For a broader overview of how these medicines fit into the wider category, see our guide to weight-loss injections or read more about slimming injections generally.
If you are curious about how access to these medicines works in different healthcare settings, our page on slimming injections and prescribing routes covers the topic in more detail. You may also find our overview of weight-loss injection names and types a useful companion read.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
Tracking the right four numbers — weight, waist, protein and dose — turns a noisy chart into a clear story. That's the loop GLP-1 users keep coming back for.
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Keeping Track of Your Injection with GLP Trackr
Once you know the name of your medicine, the next step is building a consistent routine around it — and that is where GLP Trackr can help.
The most directly useful feature for injection days is injection-site tracking and rotation. Both Mounjaro and Wegovy are injected into the abdomen, thigh, or upper arm, and rotating between sites each week helps keep the skin in good condition. GLP Trackr logs each injection site you use and suggests where to inject next, so rotation becomes something the app manages for you rather than something you have to remember manually.
Alongside that, dose logging gives you a clear record of every shot — date, time, and dose strength — so you always know exactly where you are in your schedule. If you ever need to discuss your history with your prescriber, it is all there in one place.
GLP Trackr also lets you log any side effects you notice after an injection, helping you spot patterns over time and bring a clear picture to your next appointment.
Always follow your prescriber or doctor's guidance on how and where to inject — they know your individual circumstances. If you experience any unexpected or persistent reactions at an injection site, contact your healthcare professional promptly. GLP Trackr is a tracking tool, not a substitute for clinical advice.
Ready to bring some structure to your injection routine? GLP Trackr is available free on the App Store and Google Play — give it a go with a 7-day free trial and see how easy consistent tracking can be.
What does glptrackr include?
10+ powerful features. One app. Built specifically for Mounjaro and Wegovy users.
Everything your GLP-1 journey needs. Free to try for 7 days.
Morning Check-In
Start every day with a 60-second wellness check-in. Log how you're feeling, track nausea, appetite, energy, and mood — giving you and your care team a complete picture of how your medication is working.
Injection Tracking
Log every dose with a single tap. Track your dose history, phase in your cycle, estimated medication levels, and upcoming injection dates — with reminders so you never miss a scheduled shot.
Hydration Reminders
Staying hydrated is especially important on GLP-1 medications. Set daily water targets, log intake throughout the day, and receive smart nudges when you're falling behind your goal.
Smart Meal Planning
Personalized meal plans built around your current dose phase and side effects. Every meal is GLP-1 optimized — high in protein, gentle on the stomach, and scaled to your reduced appetite.
Recipe Library
Browse 50+ high-protein, GLP-1-friendly recipes filtered by meal type, prep time, and dietary needs. Every recipe includes full nutrition info, step-by-step instructions, and tips for eating with side effects.
Progress Analytics
Beautiful, easy-to-read charts show your weight loss trajectory, weekly nutrition trends, medication responses, and wellbeing scores over time — turning raw data into genuine insights.
AI Meal Scanning
Snap a photo of any meal and get a full nutrition breakdown in seconds — calories, protein, carbs, fat, and fibre. No searching. No manual logging. Just point, snap, and track.
Exercise & Steps
Log walks, workouts, and movement with activity targets that flex with your energy levels. On lower-energy dose days, gentler targets keep you moving without burning out.
Community Support
Connect with thousands of others navigating the same medication journey. Share milestones, ask questions, find accountability partners, and get support from people who truly understand.
Never Forget a Dose Again.
Log your Mounjaro or Wegovy injection in seconds. Track your pen, your dose level, and your injection site — so you always know exactly where you are in your treatment.
Watch Your Body Transform, Week by Week.
Log your weight, measurements, and how you're feeling after each dose. GLPTrackr turns your data into clear, motivating charts that show you how far you've really come.
You're Not on This Journey Alone.
Connect with thousands of real GLP-1 users sharing their wins, side effect tips, and meal ideas. Get the support of people who truly get it — because they're living it too.
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The Most Advanced GLP-1 Brain Ever Built.
The first AI built exclusively for GLP-1 weight loss. Every insight, every meal plan, every prediction trained on one thing only: helping you get the most out of your medication.
Knows Your Cycle
GLPIQ tracks where you are in your injection cycle and adjusts everything around it: lighter meals on nausea days, higher protein when appetite returns, and smarter targets as your medication level shifts.
Predicts Before You Feel It
GLPIQ learns your personal side effect patterns over time. After a few cycles, it starts warning you the morning before a rough day — and adjusts your meal plan automatically.
Finds Your Golden Dose
GLPIQ analyses every dose you've been on: weight loss rate, side effects, food noise, mood, protein adherence and tells you which dose gave you the best results. No other app does this.
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Frequently asked questions.
The two main prescription slimming injections are Mounjaro (active substance: tirzepatide) and Wegovy (active substance: semaglutide). Both are once-weekly injectable medicines available only on prescription, and suitability is decided by a prescriber on an individual basis.
The brand name is the commercial name — Mounjaro or Wegovy. The active substance name is the scientific ingredient — tirzepatide or semaglutide respectively. Your prescriber or pharmacist may use either, so it helps to know both.
Both are once-weekly injectable GLP-1 receptor agonists used in weight management. Wegovy (semaglutide) acts on GLP-1 receptors; Mounjaro (tirzepatide) acts on both GLP-1 and GIP receptors. Which is appropriate for you is a decision for your prescriber.
Yes. GLP Trackr supports logging for both Mounjaro and Wegovy — including injection site, dose, date, and rotation history. The app helps you stay consistent whichever medicine you have been prescribed.
Both medicines are generally injected under the skin of the abdomen, thigh, or upper arm. Rotating between sites is recommended. For specific technique guidance, always follow your prescriber's instructions and the patient information leaflet supplied with your medicine.