Mounjaro and Wegovy: What the Names Mean
When people search for "the new slimming injection" or "the name of the weight loss injection", they are almost always referring to one of these two medicines. Here is a factual, neutral overview of each.
Mounjaro (tirzepatide)
Mounjaro is the brand name; tirzepatide is the active substance. It is a dual GIP and GLP-1 receptor agonist — meaning it acts on two appetite-regulating hormone pathways. It is supplied as a pre-filled injection pen and is taken once a week. Doses are started low and adjusted over time by a prescriber.
Wegovy (semaglutide)
Wegovy is the brand name; semaglutide is the active substance. It is a GLP-1 receptor agonist, acting on one of the same pathways. Also a once-weekly pre-filled injection pen, started at a low dose and titrated by a prescriber over several months.
What they have in common
- Both are prescription-only medicines — they must be prescribed by a qualified healthcare professional
- Both are self-injected subcutaneously (just under the skin) once a week
- Both are commonly associated with increased feelings of fullness and reduced appetite
- Both require rotating injection sites to keep the skin healthy
It is worth noting these are not insulin, and they are not suitable for everyone — your prescriber will have assessed whether the medicine is right for you specifically.
For a closer look at injection sites and how rotation works in practice, see our guides on understanding your weight loss injection and the slimming injection explained. You can also explore more about the name and background of weight loss injections in our related guide.
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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How GLP Trackr Helps Once You Are Prescribed
Knowing the name of your injection is just the start — staying consistent with a weekly injection schedule, rotating sites correctly, and keeping a clear record of every dose is where many people find a purpose-built app makes a real difference.
Injection-site tracking and rotation
GLP Trackr lets you log each injection: the site you used (abdomen, thigh, or upper arm), the date, and the dose strength. The app then tracks your rotation history and suggests your next site automatically — so you never have to guess or rely on memory. Consistently rotating sites is generally recommended to avoid skin reactions at the injection area, and having a clear log makes this effortless.
Dose logging and reminders
A once-weekly injection is easy to lose track of — especially when life gets busy. The app's dose reminders keep your weekly schedule on track, and every logged injection builds a clear record you can share at your next prescriber appointment. The weight loss injections hub has more guidance on getting the most from your treatment journey.
GLP Trackr is built specifically for people already on Mounjaro or Wegovy — it is not a pharmacy, a prescriber, or a source of medical advice. Any questions about your dose, your injection technique, or whether the medicine is right for you belong with your prescriber or doctor, who knows your full history.
Ready to take the guesswork out of your injection schedule? 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 effortless logging your shots 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 (tirzepatide) and Wegovy (semaglutide). Both are once-weekly injectable medicines that must be prescribed by a qualified healthcare professional. The right one for you is a decision your prescriber will have made based on your individual circumstances.
No. Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist. Wegovy contains semaglutide, a GLP-1 receptor agonist. Both are once-weekly injections, but they have different active substances and mechanisms. Your prescriber will have chosen whichever is appropriate for you.
Rotating injection sites is generally recommended for once-weekly subcutaneous injections to help keep the skin healthy. Common sites include the abdomen, thigh, and upper arm. Your prescriber or the patient information leaflet with your pen will give guidance specific to your medicine.
GLP Trackr lets you log each injection — recording the site used, date, and dose strength. It tracks your rotation history, suggests your next injection site, and sends reminders so you never miss a weekly dose. The app is available free on the App Store and Google Play with a 7-day trial.