How Mounjaro Differs from Other GLP-1 Medicines
The most meaningful distinction between Mounjaro and medicines like Wegovy comes down to how they act on the body's appetite-regulating pathways.
Mounjaro (tirzepatide): a dual-acting medicine
Tirzepatide is a dual GIP and GLP-1 receptor agonist. This means it acts on two separate receptors — the glucose-dependent insulinotropic polypeptide (GIP) receptor as well as the GLP-1 receptor. Both pathways are involved in appetite regulation and the feeling of fullness after eating.
Wegovy (semaglutide): a GLP-1 receptor agonist
Semaglutide, the active substance in Wegovy, targets only the GLP-1 receptor. It is also a once-weekly injection and works on similar appetite and fullness pathways, but without the additional GIP action. For a fuller look at how semaglutide compares specifically, see this Wegovy comparison overview.
Shared characteristics
Both medicines share several features worth knowing:
- Both are prescription-only and must be initiated and managed by a qualified prescriber
- Both are administered as once-weekly subcutaneous injections using pre-filled pens
- Both are typically started at a low dose, with gradual titration guided by the prescriber over time
- Both are associated with commonly reported gastrointestinal side effects such as nausea, constipation, and indigestion, particularly during dose increases
- Both carry a black triangle (▼) designation in the UK, meaning side effects should be reported to your national pharmacovigilance scheme (such as the UK's Yellow Card scheme) and to your healthcare professional
What the comparison does not tell you
Factual mechanism differences do not determine which medicine is suitable for any individual. Suitability depends on your medical history, any other medicines you take, and your prescriber's clinical judgement. You can read more background on Mounjaro specifically on the Mounjaro information hub. For a side-by-side look at injection site considerations that apply to both medicines, the injection site comparison guide covers the commonly used locations in more detail.
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.
AI Meal Tracking. Built for GLP 1 Appetites.
Point your camera at any meal and let our AI do the rest. Breakfast, doses, weight, mood all tracked in seconds.
Tracking Whichever Medicine You're On with GLP Trackr
GLP Trackr is built to support people already prescribed either Mounjaro or Wegovy — the app works for both, and your tracking experience is the same regardless of which medicine your prescriber has chosen for you.
The most relevant feature for anyone comparing or switching between medicines is side-effect tracking. If you notice differences in how you feel at various points in your treatment — nausea patterns, energy levels, appetite changes — logging these in the app builds a clear, timestamped record you can bring to your next prescriber appointment rather than relying on memory.
Alongside that, the app's dose and injection logging ensures every weekly shot is recorded with the date, dose strength, and injection site, so your prescriber has an accurate picture of your treatment history when reviewing your progress or considering any adjustments.
Any decision about which medicine is right for you, or whether to change treatment, belongs with your prescriber or doctor — they have the full clinical picture. GLP Trackr is here to help you stay consistent and organised on the journey they have set out for you, not to replace their guidance.
If you are already taking Mounjaro or Wegovy and want a simpler way to stay on top of your doses, side effects, and progress, GLP Trackr is free to try. Download it on the App Store or Google Play and start a 7-day free trial.
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.
Download on the App Store Download on the Google Play
Founding Member Offer
One plan. Everything included. No hidden extras.
Founding Member
Exclusive Offer
Join the first 1,000 membersand lock in our lowest ever price
Offer expires in:
786 of 1000 founding spots remaining
50% OFF
Lifetime Price Lock
Never pay full price • Forever
🔒 No credit card required • Cancel anytime
Premium
Ad-free- Track weight, meals, water, exercise, & sleep
- Log doses, injection sites, & side effects
- 60-second daily morning check-in
- AI meal scanning & barcode scanning
- Personalised AI meal plans & recipes
- Golden Dose Finder AI
- Medication Clock — real-time level tracking
- Daily Brief and predictive side effects
- Full insights & weekly transformation cards
- Unlimited progress photos
- Doctor PDF export & body measurements
- Community Access—Connect with GLP-1 users
Powered by
🔒 No credit card required • Cancel anytime
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.
Download glptrackr today.
Available on iOS and Android. 7-day free trial, no credit card needed.
Frequently asked questions.
Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, acting on two appetite-regulating pathways. Wegovy (semaglutide) targets only the GLP-1 receptor. Both are once-weekly prescription-only injections. Which is suitable for you is a decision for your prescriber.
Neither medicine can be labelled universally better. Suitability depends on your individual medical history and your prescriber's clinical judgement. The right choice for you is one only your prescriber or doctor can make, based on your full health picture.
Any change of medication — including switching between tirzepatide and semaglutide — is a clinical decision that must be made by your prescriber. Do not start, stop, or switch medicines without their guidance. Your prescriber can advise on whether a switch is appropriate for you.
Yes. GLP Trackr is designed for people already prescribed either Mounjaro (tirzepatide) or Wegovy (semaglutide). You can log doses, injection sites, side effects, food, weight, and progress regardless of which medicine you have been prescribed.
Both medicines are commonly associated with gastrointestinal effects such as nausea, constipation, and indigestion, particularly around dose increases. Side effects vary between individuals. If you experience anything severe or persistent, contact your healthcare professional promptly.