Tirzepatide Dosage Schedule: Week-by-Week Guide
Starting dose: Tirzepatide begins at 2.5mg weekly for 4 weeks. This is below the therapeutic threshold — it is a tolerance-building dose. Meaningful weight loss begins at 5mg and above.
Standard Tirzepatide Dose Escalation Schedule
| Weeks | Dose | Phase | Expected Effect |
|---|---|---|---|
| 1–4 | 2.5mg | Initiation | Adjustment — mild appetite reduction |
| 5–8 | 5mg | Escalation | First therapeutic dose — clear appetite suppression |
| 9–12 | 7.5mg | Escalation | Increased satiety, weight loss accelerating |
| 13–16 | 10mg | Escalation | Significant weight loss phase for most patients |
| 17–20 | 12.5mg | Escalation | Near maximum dose |
| 21+ | 15mg | Maintenance | Maximum approved dose |
💡 Not everyone needs to reach 15mg. Many patients achieve their weight loss goals at 10mg or 12.5mg. Your prescriber will guide dose escalation based on your response and tolerance.
Tirzepatide vs Semaglutide Dose Comparison
| Medication | Starting Dose | Max Dose | Escalation Steps |
|---|---|---|---|
| Tirzepatide (Mounjaro/Zepbound) | 2.5mg/week | 15mg/week | 6 steps (every 4 weeks) |
| Semaglutide (Wegovy) | 0.25mg/week | 2.4mg/week | 4 steps (every 4 weeks) |
When to Hold Your Dose
Stay at your current dose (do not escalate) if:
- Nausea, vomiting, or diarrhea has not resolved since the last escalation
- You have not completed 4 full weeks at the current dose
- Your prescriber has advised holding
- You are losing weight steadily and tolerating the current dose well — there is no requirement to reach maximum dose
Injection Day Setup
Tirzepatide is injected once weekly on the same day each week. Time of day does not matter — consistency on the day is what matters. See our tirzepatide dosing calendar to track your schedule.
⚠ Never escalate your own dose without prescriber guidance. Faster escalation increases the risk of severe GI side effects and does not accelerate long-term weight loss outcomes.
See also: Tirzepatide Mixing Chart · Units Conversion Chart
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