Quick Summary

Mounjaro dosing starts at 2.5mg weekly and increases every 4 weeks up to a maximum of 15mg. The titration schedule helps minimise side effects while maximising weight loss results. Always follow your pharmacist's dosing instructions.

Mounjaro Dosage Guide: Complete Dosing Schedule

Medical Review: Reviewed by registered pharmacist. Last Updated: December 2025. Location: Glasgow, Scotland.

Mounjaro Dosing Schedule

Mounjaro (tirzepatide) is administered as a weekly injection. The treatment follows a gradual titration schedule to help your body adjust to the medication and minimise side effects while maximising weight loss results.

Standard Titration Schedule

The typical Mounjaro dosing schedule follows this progression:

Week	Dose	Purpose
Weeks 1-4	2.5mg	Starting dose to help body adjust
Weeks 5-8	5mg	First increase for enhanced effects
Weeks 9-12	7.5mg	Moderate therapeutic dose
Weeks 13-16	10mg	Higher therapeutic dose
Weeks 17-20	12.5mg	Near-maximum dose
Week 21+	15mg	Maximum recommended dose

Individualised Dosing

Your pharmacist will determine the best dosing schedule for you based on:

Your response to treatment
Tolerance of side effects
Weight loss progress
Medical history and current medications

Some patients may stay on a lower dose if they're achieving good results, while others may need to increase more quickly. Always follow your pharmacist's specific instructions.

How to Administer Mounjaro

Mounjaro comes in a pre-filled pen that you inject once weekly. Learn more about how to inject Mounjaro safely.

What to Do If You Miss a Dose

If you miss your weekly Mounjaro injection:

Within 4 days: Take the missed dose as soon as you remember, then resume your regular schedule
More than 4 days: Skip the missed dose and take your next scheduled dose on time
Never double up: Do not take two doses to make up for a missed dose

If you're unsure what to do, contact your pharmacist for guidance.

Frequently Asked Questions

What is the starting dose of Mounjaro?

Mounjaro treatment typically starts at 2.5mg once weekly. This low starting dose helps your body adjust to the medication and minimises side effects.

How often do I increase my Mounjaro dose?

The dose is usually increased every 4 weeks, following a titration schedule: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg. Your pharmacist will determine the best schedule for you.

What is the maximum dose of Mounjaro?

The maximum recommended dose of Mounjaro is 15mg once weekly. Most patients find their optimal dose between 5mg and 15mg.

Can I skip a dose of Mounjaro?

If you miss a dose, take it as soon as you remember if it's within 4 days of your scheduled dose. If more than 4 days have passed, skip the missed dose and resume your regular schedule. Never double up on doses.

What happens if I take too much Mounjaro?

Taking more than the prescribed dose can increase side effects. If you accidentally take too much, contact your pharmacist or seek medical attention immediately.