What Is Tirzepatide? How It Works and What to Track
Tirzepatide powers Mounjaro and Zepbound. Here is a practical guide to what tirzepatide is and what GLP-1 users track on it.
Tirzepatide sits at the centre of many GLP-1 conversations — whether you know it as Mounjaro, Zepbound, or simply "my weekly injection."
What tirzepatide is
Tirzepatide is a medication that activates GLP-1 and GIP receptors, as described in the NHS tirzepatide guide and official prescribing information. Brand names and approved uses vary by country, but the practical tracking experience is similar for most users:
- Once-weekly injection
- Step-by-step dose increases (titration)
- Changes in appetite, weight and side effects over weeks
Why tracking matters on tirzepatide
Titration means your dose changes over time. Without a log, it is easy to forget which pen strength you used last, when you injected, or whether nausea lined up with a dose increase.
Most people track:
- Injection history — date, dose, site
- Appetite shifts — hunger, fullness, cravings
- Weight trends — weekly averages, not daily noise
- Side effects — when they started and how long they lasted
Tirzepatide vs semaglutide
Semaglutide (Wegovy, Ozempic) is a different GLP-1 medication. People often compare them — we cover that in our tirzepatide vs semaglutide guide. From a tracking perspective, both benefit from the same habits: log injections, observe patterns, bring notes to appointments.
Start tracking calmly
Download GLPPal on the App Store for tirzepatide-friendly tracking.
Track your GLP-1 journey with GLPPal
GLPPal helps you log injections, appetite, weight and side effects in one calm app — built for Mounjaro, Zepbound, Wegovy and other GLP-1 users.
Sources
- Tirzepatide (Mounjaro) — NHS
- Mounjaro prescribing information — DailyMed (NIH/FDA)
- Mounjaro (tirzepatide) — MHRA summary of product characteristics
GLPPal is designed for tracking and educational purposes only and is not medical advice. Always follow your healthcare provider's guidance.
