Mounjaro Patient Information Leaflet: What You Need to Know

The official PIL is produced by the manufacturer and approved by medicines regulators. It accompanies every pack of Mounjaro and is the definitive reference for anyone already taking tirzepatide. An identical digital version is available on the electronic Medicines Compendium (eMC), where you can download the Mounjaro patient information PDF at any time — useful if your printed leaflet is lost or hard to read.

Key sections you will find in the leaflet

• What Mounjaro is and what it is used for — a factual description of tirzepatide as a dual GIP and GLP-1 receptor agonist, and the conditions for which it has been approved.
• What you need to know before using Mounjaro — contraindications, warnings, interactions with other medicines, and special circumstances such as pregnancy or breastfeeding.
• How to use Mounjaro — injection guidance, dose schedule, and what to do if a dose is missed. All dose decisions should follow what your prescriber has told you and the instructions in the leaflet; never adjust your dose independently.
• Possible side effects — a comprehensive list of commonly reported effects (including nausea, diarrhoea, and constipation) and rarer effects that require prompt medical attention.
• How to store Mounjaro — temperature and handling requirements; check the leaflet that came with your pen for exact figures, as conditions can affect how long an opened pen remains usable.
• Reporting side effects — the leaflet directs you to report unexpected or serious side effects to your national reporting scheme (such as the UK Yellow Card scheme) and to your prescriber or doctor.

The Wegovy patient information leaflet follows the same structure and is similarly available on the eMC for semaglutide. If you have been prescribed Wegovy rather than Mounjaro, the principles of reading and acting on the PIL are identical.

For a closer look at what comes with your pen and how to keep your leaflet accessible, see our guide to the Mounjaro leaflet and pack contents, or explore broader information on using Mounjaro as part of your weight-loss journey.

The PIL tells you what the medicine is and how to use it — GLP Trackr helps you live that routine consistently, week after week. The feature that pairs most directly with leaflet guidance is dose and injection logging: every time you administer a dose, you record the date, dose strength, and injection site in the app. That running log means you always know exactly when your last injection was, which site you used, and how many doses you have taken — details the leaflet instructs you to keep track of but gives you no tool to capture.

Beyond injection logging, the app's side-effect tracker lets you note symptoms as they arise and see patterns over time. If you experience nausea, fatigue, or any of the effects described in your PIL, logging them in GLP Trackr creates a clear record to bring to your next prescriber appointment — far more useful than trying to recall how you felt three weeks ago.

If you want to stay consistent with the once-weekly schedule described in your leaflet, dose reminders in GLP Trackr mean a dose is far less likely to slip your mind.

GLP Trackr is an informational and tracking tool, not a substitute for reading your PIL or following your prescriber's instructions. If anything in your leaflet is unclear, or if you experience symptoms that concern you, contact your prescriber or doctor promptly — they are always the right first call. Any decision about your dose or treatment belongs with your healthcare professional, not an app.

Note that Mounjaro tablets are not a currently approved form of this medicine; if you have seen references to Mounjaro tablets, the app and this guide relate to the injectable pen as described in the standard PIL.

Ready to make your weekly routine easier to follow? Download GLP Trackr on the App Store or Google Play — your first 7 days are completely free.