How Mounjaro, Ozempic, and Wegovy Actually Differ
The confusion is understandable — these medicines belong to a related family and share some characteristics, but the differences are clinically meaningful.
Mounjaro (tirzepatide)
Mounjaro contains tirzepatide, a dual receptor agonist that acts on both GIP (glucose-dependent insulinotropic polypeptide) and GLP-1 (glucagon-like peptide-1) receptors. It is a prescription-only, once-weekly injection supplied in pre-filled pens at dose strengths including 2.5, 5, 7.5, 10, 12.5, and 15 mg. Because it targets two appetite-regulating pathways, its mechanism is distinct from medicines that act on GLP-1 alone.
Ozempic (semaglutide)
Ozempic contains semaglutide and acts on GLP-1 receptors only. It is a prescription-only, once-weekly injection licensed primarily for the management of type 2 diabetes. It is not the same medicine as Mounjaro — different active substance, different receptor profile, different licensed indication.
Wegovy (semaglutide)
Wegovy also contains semaglutide — the same active substance as Ozempic — but it is a separately licensed medicine, supplied at different dose strengths and licensed specifically for chronic weight management. So while Wegovy and Ozempic share an active substance, they are distinct products with different approvals. Mounjaro is not the same as Wegovy either; tirzepatide and semaglutide are different molecules. You can explore that comparison further in our article on whether Mounjaro and Wegovy are the same medicine, and for a related comparison see how Wegovy and Ozempic compare.
A note on the "2 x 2.5 mg = 5 mg" question
Some people wonder whether taking two doses of the 2.5 mg Mounjaro pen is equivalent to a single 5 mg dose. This is a dosing question that belongs entirely with your prescriber — the app can log what you have taken, but any decision about your dose or pen usage must be made with the clinician who prescribed it, not on your own. Never alter how you use your medication without professional guidance.
For a broader look at how tirzepatide works in the body, see our guide to how Mounjaro works. You may also find our dedicated page on Mounjaro and Ozempic similarities and differences useful for a more detailed breakdown.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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Tracking Your Mounjaro Journey with GLP Trackr
Whichever GLP-1 medicine you have been prescribed, one of the most practical things you can do is keep a clear, consistent record of your treatment. GLP Trackr is built specifically for people already on Mounjaro or Wegovy, and the most directly relevant feature here is dose logging — recording every injection with its date, dose strength, and injection site, so you always have an accurate picture of your treatment history to bring to prescriber appointments.
Alongside dose logging, the app's insights and analytics draw on all your tracked data — weight, side effects, energy, food — to surface patterns that are genuinely useful to review with your healthcare professional. If you have been switched from one medicine to another, or are simply trying to understand your own response over time, having that record in one place makes those conversations much clearer.
Any questions about whether your medicine is the right one, how doses should be managed, or whether a change is appropriate are decisions for your prescriber or doctor — they know your full history in a way no app can. GLP Trackr helps you record and organise what is happening so you arrive at those conversations well-prepared, not as a substitute for them.
Ready to build a clear picture of your journey? Download GLP Trackr on the App Store or Google Play — your first 7 days are completely free.
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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.
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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.
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Frequently asked questions.
No. Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist, while Ozempic contains semaglutide, which acts on GLP-1 receptors only. They are different medicines with different active substances, mechanisms, and licensed uses.
No. Wegovy contains semaglutide (a GLP-1 receptor agonist), while Mounjaro contains tirzepatide (a dual GIP and GLP-1 receptor agonist). Both are once-weekly prescription injections for weight management, but they are distinct medicines.
Both Wegovy and Ozempic contain semaglutide, but they are separately licensed medicines with different dose strengths and different approved indications. Wegovy is licensed for weight management; Ozempic is licensed primarily for type 2 diabetes.
This is a dosing question that must be discussed with your prescriber or doctor. Never alter how you use your medication without professional guidance — your prescriber is the right person to advise on any aspect of your dose or pen usage.
That decision belongs with your prescriber or doctor, who can assess your individual circumstances, medical history, and treatment goals. GLP Trackr supports people already prescribed either Mounjaro or Wegovy by helping them track their journey — it does not provide prescribing advice.