Tirzepatide Dosage for Weight Loss: Complete Dosing Guide

A complete guide to tirzepatide dosing for weight loss, including Mounjaro and Zepbound schedules, compounded options, titration, and how to start online.

July 24, 2026Healthy-Weight Editorial11 min read

Medically reviewed by Dr. Sarah Chen, MD

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What is tirzepatide?

Tirzepatide is a dual GIP and GLP-1 receptor agonist sold under the brand names Mounjaro (for type 2 diabetes) and Zepbound (for chronic weight management). It is one of the most effective weight loss medications, with clinical trials showing up to 21% average weight loss.

This guide explains the standard tirzepatide dosing schedule for weight loss, including how to start low and increase gradually to minimize side effects.

Why dosing matters

Tirzepatide is given once weekly as a subcutaneous injection. Higher doses generally produce more weight loss, but they also increase the risk of nausea, vomiting, diarrhea, and stomach pain. Titrating slowly helps your body adapt.

Most people should not start at the maximum dose. The goal is to reach the highest tolerated dose over several months for the best weight loss results.

Standard Mounjaro and Zepbound dosing schedule

The brand-name dosing schedule for Mounjaro and Zepbound is:

Weeks 1 to 4: 2.5 mg once weekly
Weeks 5 to 8: 5 mg once weekly
Weeks 9 to 12: 7.5 mg once weekly
Weeks 13 to 16: 10 mg once weekly
Weeks 17 to 20: 12.5 mg once weekly
Week 21 onward: 15 mg once weekly

Dose increases usually happen every 4 weeks if side effects are manageable. Some providers move more slowly if nausea or other symptoms are significant.

Compounded tirzepatide dosing

Compounded tirzepatide may offer more flexible dosing. Your provider can customize the starting dose and titration plan based on your response. A common compounded starting plan is:

Weeks 1 to 4: 2.5 mg weekly
Weeks 5 to 8: 5 mg weekly
Weeks 9 to 12: 7.5 mg weekly
Weeks 13 to 16: 10 mg weekly
Maintenance: 10 mg to 15 mg weekly depending on response

Some compounded programs use vials with syringes, allowing smaller incremental increases. This can help reduce side effects for sensitive patients.

Tirzepatide dosing chart

Week	Typical dose	Purpose
1-4	2.5 mg	Starting/adjustment
5-8	5 mg	Initial weight loss
9-12	7.5 mg	Increased appetite suppression
13-16	10 mg	Stronger weight loss
17-20	12.5 mg	Approaching maximum dose
21+	15 mg	Maximum maintenance dose

How to inject tirzepatide

Tirzepatide is injected under the skin once per week, at any time of day. Common injection sites include:

Abdomen, at least 2 inches from the belly button
Front of the thigh
Back of the upper arm

Rotate injection sites each week to reduce irritation. Brand-name pens are usually pre-filled and single-use. Compounded tirzepatide may come in a vial with small insulin syringes.

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How to titrate tirzepatide safely

Follow these tips to minimize side effects:

Increase the dose only if the current dose is well tolerated
Eat smaller, slower meals
Stay well hydrated
Avoid very fatty, greasy, or heavily processed foods
Wait at least 4 weeks before increasing
Contact your provider if side effects are severe

If you experience persistent vomiting, severe abdominal pain, or signs of dehydration, seek medical care immediately.

What if side effects are too strong?

Nausea and stomach upset are the most common reasons people stop tirzepatide. If side effects are severe, your provider may:

Pause dose increases for a few weeks
Lower the dose temporarily
Switch to a slower titration schedule
Recommend anti-nausea medication

How much weight should I expect at each dose?

Weight loss tends to accelerate as the dose increases:

2.5 mg to 5 mg: 3 to 10 pounds per month
7.5 mg to 10 mg: 8 to 15 pounds per month
12.5 mg to 15 mg: 10 to 20 pounds per month

These numbers vary widely based on starting weight, diet, activity, and individual response.

Frequently asked questions

What is the maximum dose of tirzepatide for weight loss?

The maximum approved dose for Mounjaro and Zepbound is 15 mg once weekly. Some compounded programs use similar maximum doses.

Can I stay on a low dose if I am losing weight?

Yes. Some patients achieve excellent results on 5 mg or 7.5 mg and choose not to increase. Your provider can help decide the best maintenance dose.

What happens if I miss a dose?

Take the missed dose as soon as possible within 4 days of the scheduled dose. If more than 4 days have passed, skip the missed dose and resume your regular schedule.

How do I get tirzepatide prescribed?

US telehealth programs can evaluate you and prescribe compounded tirzepatide or coordinate brand-name Mounjaro or Zepbound.

Is the dosing different for compounded tirzepatide?

The milligram dosing is the same, but compounded programs may offer more flexible titration and syringe-based dosing.

Conclusion

Tirzepatide dosing for weight loss starts low and increases gradually over several months. The standard schedule reaches 15 mg weekly, but many patients see strong results on lower doses. Slow titration, healthy eating, and medical supervision are key to success.

Ready to start your tirzepatide plan? Check your eligibility for a US telehealth tirzepatide program and get a personalized dosing plan with home delivery.

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