How Ozempic and Mounjaro Compare: The Key Facts
Ozempic (semaglutide) and Mounjaro (tirzepatide) are both once-weekly injectable medicines prescribed for weight management and, in some cases, blood-sugar control. They share a similar delivery format — pre-filled injector pens administered under the skin — and both are taken on a regular weekly schedule set by your prescriber.
Where they differ mechanically
Semaglutide, the active substance in Ozempic, is a GLP-1 receptor agonist. It mimics a hormone involved in appetite regulation and the sensation of fullness. Tirzepatide, found in Mounjaro, is a dual GIP and GLP-1 receptor agonist — it acts on two pathways rather than one. What this means in practice for any individual varies, and suitability is always a matter for a prescriber to assess.
What they have in common
- Both are prescription-only medicines — they cannot be obtained without a prescription from a qualified prescriber.
- Both are given as once-weekly subcutaneous injections.
- Both are typically started at a lower dose, with adjustments made over time by the prescriber.
- Both commonly share a similar side-effect profile, particularly gastrointestinal effects such as nausea, constipation, and indigestion.
- Both carry a black triangle (▼) designation in some countries, meaning side effects should be reported to your national reporting scheme — for example, the UK's Yellow Card scheme — and to your healthcare professional.
It is worth noting that Wegovy, not Ozempic, is the licensed weight-management formulation of semaglutide in many countries. If you want to understand the detailed differences between these medicines, or explore whether Ozempic and Mounjaro are the same medicine, those pages go deeper on the specifics. For a broader overview of Mounjaro and how it is used, the Mounjaro guide covers the essentials.
What about alternatives?
Some people searching for an alternative to Ozempic and Mounjaro are already prescribed one of these medicines and wondering about switching, or are curious about what other options exist. Any decision to change medication — or to explore alternatives — belongs entirely with your prescriber or doctor. They will weigh up your medical history, current treatment response, and personal circumstances. This is not something to navigate alone or without clinical guidance.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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Tracking Whichever Medicine You Are On with GLP Trackr
GLP Trackr is built for people already taking a GLP-1 medicine — whether that is Mounjaro, Wegovy, or another prescribed option. Whichever pen is in your fridge, the app is designed to support the day-to-day reality of weekly injections and the journey that comes with them.
The most practical place to start is dose and injection logging. Every time you take your weekly injection, you can record the dose strength, date, time, and injection site. The app tracks your rotation history across sites — abdomen, thigh, upper arm — and suggests where to inject next, so you are not trying to remember which site you used three weeks ago.
If you are experiencing side effects like nausea or fatigue — common with both semaglutide and tirzepatide-based medicines — the side-effect tracker lets you log how you feel after each dose and spot patterns over time. That kind of record can be genuinely useful to bring to your next prescriber appointment. You might also find it helpful to read about interactions and considerations around other medicines you may be taking alongside Mounjaro.
GLP Trackr supports both medicines and does not favour one over the other — it simply helps you stay consistent and informed on whichever treatment your prescriber has recommended.
Always follow the guidance of your prescriber or doctor regarding your medication. If you experience symptoms that are severe, persistent, or concern you, contact your healthcare professional promptly — GLP Trackr helps you record what is happening so you can discuss it with them, but it is not a substitute for their advice.
Ready to make your weekly routine easier to manage? Download GLP Trackr on the App Store or Google Play and start a free 7-day trial — log your first injection, set up your rotation, and see your journey take shape.
What does glptrackr include?
10+ powerful features. One app. Built specifically for Mounjaro and Wegovy users.
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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 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.
No. Ozempic contains semaglutide, a GLP-1 receptor agonist, while Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist. They are related but distinct prescription-only medicines with different active substances and mechanisms.
Any decision to switch between medicines is one for your prescriber or doctor to make based on your individual health history and treatment response. Never change, stop, or swap your medication without guidance from your healthcare professional.
Several prescription medicines act on similar pathways, including Wegovy, which is a licensed weight-management formulation of semaglutide in many countries. What is appropriate for you depends on your medical circumstances — your prescriber is the right person to discuss alternatives with.
Yes. GLP Trackr supports people prescribed any GLP-1 medicine, including both semaglutide- and tirzepatide-based treatments. You can log doses, injection sites, side effects, weight, and more, regardless of which medicine you have been prescribed.
Both medicines commonly share gastrointestinal side effects such as nausea, constipation, and indigestion. Individual experiences vary. If side effects are severe, persistent, or worrying, contact your healthcare professional and report them to your national reporting scheme.