The Different Names for Mounjaro and Wegovy Explained
Prescription medicines typically have three kinds of names, and weight-loss injectables like Mounjaro and Wegovy are no exception:
Brand name
Mounjaro is the brand name given by the manufacturer (Eli Lilly) to their tirzepatide injection. Wegovy is the brand name given by Novo Nordisk to their higher-dose semaglutide injection intended for weight management. If you are looking into what Wegovy is and how it works, it is worth knowing that semaglutide is also marketed under a different brand name for type 2 diabetes — though at different doses and with a separate licence.
Active substance (generic name)
The active substance in Mounjaro is tirzepatide. This is the international non-proprietary name (INN) — the scientific, manufacturer-neutral name you will see on official medicines information, clinical literature, and sometimes on the packaging itself. For Wegovy, the active substance is semaglutide. You may see the generic and chemical names for Mounjaro used interchangeably with the brand name in clinical settings.
Drug class names
Both medicines belong to a class called GLP-1 receptor agonists (glucagon-like peptide-1 receptor agonists). Tirzepatide additionally acts on GIP receptors, making it a dual GIP and GLP-1 receptor agonist. You may hear weight-loss injectables referred to colloquially as "GLP-1 medicines" or "incretin-based therapies" — these are descriptive class names rather than specific product names.
Country and context variations
Regulatory approvals vary by country, and a medicine may carry a slightly different brand name or indication in different markets. If you have seen references to other names for Mounjaro and are unsure whether they refer to the same medicine, checking the active substance name — tirzepatide — is the most reliable way to confirm. Your prescriber or doctor can clarify which product and dose was prescribed to you.
It is also worth noting that both Mounjaro and Wegovy are prescription-only medicines. Neither is available without a prescription, regardless of how they are referred to in everyday conversation.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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Keeping Track of Your Medication with GLP Trackr
Knowing the correct name of your medicine matters most when you are logging doses, reviewing your history, or preparing to speak with your prescriber — and that is exactly where GLP Trackr can help.
The app's dose logging feature lets you record each injection with the specific dose strength, date, and time, so your full medication history is always in one place. Whether your paperwork says "tirzepatide", "Mounjaro", or lists a dose by strength, you can note it clearly in the app. When you attend a review appointment, the doctor report feature gives you a clean, readable summary of your logged injections and progress — useful when your prescriber needs a quick overview of how your treatment has been going.
GLP Trackr supports people already prescribed either Mounjaro (tirzepatide) or Wegovy (semaglutide), so whichever medicine appears on your prescription, the app is built with your journey in mind. You can explore more about Mounjaro and tirzepatide in the main guide, or read about the names and background for Wegovy if that is the medicine you have been prescribed.
If you ever have questions about which product was prescribed to you, or what any name on your packaging means, always check with your prescriber or doctor — they can confirm the exact medicine, dose, and instructions that apply to you.
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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.
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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.
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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.
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Frequently asked questions.
The active substance in Mounjaro is tirzepatide. This is the international non-proprietary name you will see on clinical documents, official medicines information, and sometimes on the packaging itself, alongside the Mounjaro brand name.
Wegovy is the brand name for semaglutide used in weight management. Semaglutide is also the active substance name. You may hear it referred to as a GLP-1 receptor agonist or incretin-based therapy — these are drug class descriptions rather than specific product names.
Yes. Tirzepatide is the active substance; Mounjaro is the brand name for the medicine containing it. Both names refer to the same prescription-only injection. Your prescription or packaging may show either name, or both.
Medicines have a brand name chosen by the manufacturer, an active substance (generic) name, and a drug class name. Weight-loss injectables like Mounjaro and Wegovy each have all three, which is why the same medicine can appear under several different names depending on context.
Yes. GLP Trackr is designed for people already prescribed Mounjaro (tirzepatide) or Wegovy (semaglutide). You can log your dose by strength and date regardless of whether your paperwork uses the brand name or the active substance name.