Tirzepatide (Mounjaro/Zepbound)
Dual GIP/GLP-1 receptor agonist. GLP-1/GIP Receptor Agonist, dual incretin mimetic.
This page describes what Tirzepatide (Mounjaro/Zepbound) is and its known risks. It is not medical advice and not a guide to using it. Many of these substances are prescription-only or illegal to use without a prescription. Speak to a doctor.
- Class
- GLP-1/GIP Receptor Agonist
- Legal status
- Prescription only
- Half-life
- ~5 days
- Liver strain
- Low
- Kidney strain
- Low
- Converts to estrogen
- None
- Suppresses natural hormones
- Not typically
Medical uses
- Type 2 diabetes
- Chronic weight management (obesity)
What it does in the body
Metabolic
- Very significant appetite suppression
- Greater average weight loss than semaglutide in trials
- Improved insulin sensitivity
Forms, half-life and detection
| Form | Half-life | Reported detection window |
|---|---|---|
| Injectable (Subcutaneous) | ~5 days | Not typically tested |
Side effects and health risks
Gastrointestinal
- Nausea
- Vomiting
- Diarrhea
- Reduced appetite
Musculoskeletal
- Lean muscle loss risk if training/protein inadequate
Other
- Gallbladder issues (rare)
- Pancreatitis risk (rare)
- Thyroid C-cell tumor risk (animal studies, boxed warning)
Blood tests worth monitoring
From its known properties, these are the markers doctors commonly check. Getting blood work before, during and after is how problems are caught early.
- Affects blood sugar handling: Glucose (Fasting), HbA1c
Questions
What is the half-life of Tirzepatide (Mounjaro/Zepbound)?
About ~5 days. Half-life is the time for the level in the blood to fall by half.
How long is Tirzepatide (Mounjaro/Zepbound) detectable?
Testing windows of Not typically tested are reported, depending on the test and the person.
Is Tirzepatide (Mounjaro/Zepbound) legal?
Prescription only. Laws differ by country and change; check the rules where you live.
What blood tests matter with Tirzepatide (Mounjaro/Zepbound)?
Based on its properties, these markers are commonly monitored: Glucose (Fasting) and HbA1c. A doctor can order and interpret them.
What are the side effects of Tirzepatide (Mounjaro/Zepbound)?
Gastrointestinal: nausea, vomiting and diarrhea. Musculoskeletal: lean muscle loss risk if training/protein inadequate. Other: gallbladder issues (rare), pancreatitis risk (rare) and thyroid c-cell tumor risk (animal studies, boxed warning).
For information only, not medical advice. MyoStats is a tracking tool used at your own discretion. Speak to a doctor before changing your training, diet, medication or anything you take.