Mounjaro is started low and increased gradually so your body can adjust. This guide covers the full dosing schedule, the six available strengths, and how to handle missed doses.
Quick answer
Mounjaro (tirzepatide) starts at 2.5 mg once weekly for 4 weeks, then increases to 5 mg, and can step up by 2.5 mg every 4 weeks as needed, to a maximum of 15 mg once weekly. The 2.5 mg dose is an initiation dose meant to help your body adjust, not a maintenance dose. There are six strengths: 2.5, 5, 7.5, 10, 12.5, and 15 mg. It is injected once weekly, any time of day, with or without food. If you miss a dose, take it within 4 days; otherwise skip it.
Mounjaro dosage schedule and escalation
Mounjaro follows a planned titration to reduce gastrointestinal side effects, which are most likely after each increase. The official escalation is as follows.
| Weeks | Dose (once weekly) | Notes |
|---|---|---|
| Weeks 1 to 4 | 2.5 mg | Initiation dose to help the body adjust |
| Weeks 5 to 8 | 5 mg | First maintenance-level dose |
| Weeks 9 to 12 | 7.5 mg | Increase if needed |
| Weeks 13 to 16 | 10 mg | Increase if needed |
| Weeks 17 to 20 | 12.5 mg | Increase if needed |
| Week 21 and beyond | 15 mg | Maximum dose |
You increase only as needed and as tolerated. Many people settle at an effective dose without reaching the maximum.
How many doses (levels) of Mounjaro are there?
There are six strengths: 2.5, 5, 7.5, 10, 12.5, and 15 mg. Of these, 2.5 mg is the initiation dose, and 5, 10, and 15 mg are considered maintenance doses, with 7.5 mg and 12.5 mg serving as intermediate titration steps. This gives flexibility to find the lowest effective dose for each person.
Check your GLP-1 eligibility
Use our free BMI Calculator to see if you may qualify for provider-reviewed GLP-1 therapy.
Try the BMI Calculator →Mounjaro dose escalation guidelines
The official guidance is to start at 2.5 mg for four weeks, then move to 5 mg. After that, the dose may be increased in 2.5 mg increments after at least four weeks on the current dose, based on need and tolerability, up to 15 mg.
The four-week spacing is deliberate. Increasing faster than this tends to worsen nausea, diarrhea, and constipation without adding benefit. If side effects are difficult, your provider may hold a dose longer before stepping up. The 2.5, 7.5, and 12.5 mg doses exist mainly to smooth the path between the maintenance levels, not as long-term targets.
Mounjaro maximum dose
The maximum dose is 15 mg once weekly. There is no requirement to reach it; the goal is the lowest dose that gives good results with tolerable side effects. Some people do well at 5 or 10 mg, while others need 15 mg.
Timing, food, and missed doses
Mounjaro is injected once weekly at any time of day, with or without food. Choose a consistent day to build the habit, and rotate injection sites (abdomen, thigh, upper arm) to protect your skin.
If you miss a dose, take it as soon as possible within 4 days (96 hours). If more than 4 days have passed, skip the missed dose and resume on your regular day. Do not double up. You can change your weekly injection day as long as it has been at least 3 days since your last dose.
Comparison: doses by role
| Dose | Role |
|---|---|
| 2.5 mg | Initiation (adjustment) |
| 5 mg | Maintenance |
| 7.5 mg | Titration step |
| 10 mg | Maintenance |
| 12.5 mg | Titration step |
| 15 mg | Maximum / maintenance |
Mounjaro vs Zepbound dosing
Mounjaro (for type 2 diabetes) and Zepbound (for weight loss and obstructive sleep apnea) are both tirzepatide and share the same dosing structure: the same 2.5 mg start, the same 2.5 mg increments every four weeks, and the same 15 mg maximum. The difference is the approved use, not the titration. So if you understand the Mounjaro schedule, you understand the Zepbound schedule too. Your provider sets the right target dose based on your goals and tolerance.
Where FormBlends fits
If you are starting tirzepatide or comparing programs, FormBlends keeps plain-language guides on weight-loss treatments and a provider comparison tool so you can find a program that titrates carefully and supports you through dose changes. You can also read about compounded semaglutide.
Frequently asked questions
What is the starting dose of Mounjaro?
2.5 mg once weekly for the first 4 weeks. It is an initiation dose to help your body adjust, not a maintenance dose.
How many levels of Mounjaro are there?
Six strengths: 2.5, 5, 7.5, 10, 12.5, and 15 mg.
What is the maximum Mounjaro dose?
15 mg once weekly.
How often does the Mounjaro dose increase?
By 2.5 mg after at least 4 weeks on the current dose, as needed and tolerated, up to 15 mg.
Do I have to reach 15 mg?
No. Maintenance doses are 5, 10, and 15 mg, and many people do well below the maximum.
What if I miss a Mounjaro dose?
Take it within 4 days of the missed dose. If more than 4 days have passed, skip it and resume on your regular day.
Can I change my injection day?
Yes, as long as it has been at least 3 days since your last dose.
Does it matter when I inject?
No. Any time of day, with or without food. Consistency helps you remember.
Related guides
- Mounjaro Dosage Chart: A Complete Titration Guide With Timing and Conversions
- What Is the Highest Dosage of Mounjaro, and When Do Patients Actually Need It?
- Tirzepatide Dosage Chart: Every Dose in mg, mL, and U-100 Syringe Units
- Semaglutide Weight Loss Dosage Chart: Every Step from 0.25 mg to 2.4 mg in mg, mL, and Units
- Metformin Dosage: Starting Doses, Titration, and Maximum Limits Explained
- Zepbound Dosage Chart: All 6 Doses, the FDA Titration Schedule, and What Each Step Does
Sources
- Eli Lilly, Mounjaro prescribing information and dosing: https://uspl.lilly.com/mounjaro/mounjaro.html
- FDA, Mounjaro labeling: https://www.accessdata.fda.gov/scripts/cder/daf/
See your options in about 2 minutes
Take the free quiz and see what fits you. Quick, private, and no commitment to continue.
See my options →