The Company Behind Mounjaro: Eli Lilly and Company
Eli Lilly and Company — commonly known simply as Lilly — is the originator of tirzepatide, the active substance in Mounjaro. Lilly's scientists developed tirzepatide as a dual GIP (glucose-dependent insulinotropic polypeptide) and GLP-1 (glucagon-like peptide-1) receptor agonist, a mechanism that distinguishes it from medicines that act on GLP-1 alone.
Lilly produces Mounjaro as a prescription-only, once-weekly injectable medicine, supplied in pre-filled pen devices. The company is responsible for all stages of production — from research and clinical trials through to manufacture, quality control, and regulatory submissions worldwide.
Regulatory approvals and the Black Triangle status
Because Mounjaro is a relatively newer medicine, it carries additional monitoring status in a number of countries — indicated by a black triangle (▼) symbol on its packaging and patient information. This means healthcare professionals and patients are encouraged to report any suspected side effects to their national reporting scheme (such as the UK's Yellow Card scheme, as one example). This monitoring is coordinated through national regulators, and Lilly as the marketing authorisation holder is obligated to track and report safety data continuously.
If you have questions about who Mounjaro may not be suitable for, your prescriber or doctor is always the right person to ask. For a closer look at manufacturing detail and supply, see our page on how and where Mounjaro is made.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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What This Means for You as Someone Already Taking Mounjaro
Knowing that Lilly produces and supplies Mounjaro is useful background, but the most important relationship you have is with your prescriber or doctor, who oversees your treatment. Any questions about suitability, dose, or safety should always go to them — Lilly provides the medicine, but your clinical team manages your care.
It is also worth knowing that whether Mounjaro is right for you is a decision made by a qualified prescriber based on your individual health history. For a broader overview of Mounjaro as a medicine, visit our Mounjaro information hub.
Staying on track with GLP Trackr
Knowing who makes your medicine is one piece of the puzzle; staying consistent with your weekly injection schedule is another. GLP Trackr's dose logging feature lets you record every injection — date, time, and dose strength — so you always have a clear picture of where you are in your treatment. If you ever miss a dose, that log is something you can bring to your next prescriber appointment rather than relying on memory.
The app also surfaces insights from your own data over time — tracking patterns in weight, energy, and how you feel week by week, so your journey is more than just a number on a scale.
Ready to keep your Mounjaro journey organised in one place? Download GLP Trackr on the App Store or Google Play — your first 7 days are completely free.
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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.
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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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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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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Frequently asked questions.
Mounjaro is owned by Eli Lilly and Company, the pharmaceutical company that developed and manufactures tirzepatide. Lilly holds the patents and is responsible for global supply and regulatory submissions for the medicine.
Eli Lilly and Company manufactures Mounjaro. Lilly oversees the full production process, from research and clinical development through to the manufacture of the pre-filled injection pens supplied to patients worldwide.
Tirzepatide was created by scientists at Eli Lilly and Company. It is a dual GIP and GLP-1 receptor agonist, and Lilly conducted the clinical trials that led to its approval as a prescription-only medicine in multiple countries.
Yes. Eli Lilly has a long history in diabetes and metabolic medicines. However, questions about which medicines may be appropriate for you personally should always be directed to your prescriber or doctor, not a tracking app.
It helps you understand who is responsible for the medicine's supply and safety reporting. If you experience side effects, you can report them to your national reporting scheme alongside discussing them with your prescriber or doctor.