Mounjaro, Tirzepatide, and How Brand Names Work
Most medicines have two names: a brand name chosen by the manufacturer, and an active-substance name (the INN) that is the same worldwide regardless of which company makes it. For this medicine, Mounjaro is the brand name and tirzepatide is the active substance — so "another name for Mounjaro" and "the clinical name for Mounjaro" both point to tirzepatide.
What tirzepatide actually is
Tirzepatide is a dual GIP and GLP-1 receptor agonist. It works on two appetite-regulating pathways — GIP (glucose-dependent insulinotropic polypeptide) and GLP-1 (glucagon-like peptide-1) — which is what distinguishes it mechanically from GLP-1-only medicines. It is supplied as a pre-filled pen and is taken once a week by subcutaneous injection. Dose and titration decisions are always made by your prescriber.
Other names you might come across
You may see tirzepatide referred to in several ways depending on the context:
- Mounjaro — the brand name used in most markets worldwide
- Tirzepatide — the INN and the name used in clinical studies, prescribing information, and pharmacy dispensing labels
- The tirzepatide KwikPen — a device-specific name sometimes used in patient materials
There is no separate "peptide name" beyond tirzepatide itself — it is a synthetic peptide, but tirzepatide is its recognised scientific and regulatory name. For the authoritative product details, the electronic Medicines Compendium (eMC) holds the UK Summary of Product Characteristics (SmPC).
Wegovy and its other name
If you are researching a related medicine, Wegovy's active substance is semaglutide. Wegovy is the brand name for the weight-management formulation; semaglutide is the INN. You can read more about naming and what sets these medicines apart on the Wegovy alternative names and options page.
For a deeper look at how Mounjaro's name appears across medical and everyday contexts, see our pages on Mounjaro's name explained and Mounjaro's medical name in clinical use.
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Keeping Track of Your Medicine with GLP Trackr
Knowing that your prescription says "tirzepatide" while your pen says "Mounjaro" can cause a moment of uncertainty — especially early in treatment. GLP Trackr is built for people already prescribed this medicine and takes that ambiguity out of your weekly routine.
The most directly relevant feature here is dose logging: every time you inject, you can record the dose strength, date, and time in the app, so you always have a clear, timestamped history of your treatment — whether your records call it Mounjaro or tirzepatide. That log becomes genuinely useful at prescriber appointments, where having a precise record of your injection dates can inform decisions about titration timing.
Alongside dose logging, the app's dose reminder keeps your once-weekly schedule on track, and the injection-site tracker records each site and suggests your next rotation — small details that are easy to forget over weeks of treatment but matter for comfort and consistency.
GLP Trackr is an informational and tracking tool; it is not a substitute for your prescriber or doctor, and any questions about your prescription, your dose, or the medicine's suitability for you should go to them directly.
Ready to bring some order to your weekly routine? GLP Trackr is free to try for 7 days — available now on the App Store and Google Play. Start logging your doses and let the app handle the record-keeping.
For a broader overview of everything involved in the Mounjaro journey, visit the Mounjaro hub.
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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.
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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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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.
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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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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.
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Frequently asked questions.
The active substance (drug) name for Mounjaro is tirzepatide. Mounjaro is the brand name given by the manufacturer; tirzepatide is the international non-proprietary name (INN) used in clinical, prescribing, and regulatory contexts worldwide.
Yes. Tirzepatide and Mounjaro refer to the same medicine — tirzepatide is the active substance, Mounjaro is the brand name. Both names appear on prescriptions, patient information leaflets, and pharmacy labels, depending on the context.
Wegovy's active substance is semaglutide — that is its international non-proprietary name (INN). Wegovy is the brand name for the semaglutide formulation used in weight management. The two names refer to the same medicine.
Prescriptions often use the active-substance name (tirzepatide) rather than the brand name. Both refer to the same medicine. If you are ever unsure whether what you have dispensed matches your prescription, your pharmacist or prescriber can confirm.
Yes. GLP Trackr is built specifically for people prescribed Mounjaro (tirzepatide) and Wegovy (semaglutide). You can log each dose, date, strength, and injection site, and set weekly reminders — all within the app.