Mounjaro Injection for Weight Management

Mounjaro is a prescribed treatment shown to support weight loss when traditional methods haven’t delivered results. It targets the hormones that regulate appetite and blood sugar, which helps curb hunger and stabilize glucose levels. The pen is designed for simple once-a-week self-injection, making it easy to use as part of your routine.

You’ll receive the pen along with a full set of needles for your treatment plan.

What Is Mounjaro?

Mounjaro, also known as tirzepatide, is a recently approved treatment for weight loss in eligible individuals. It was first developed for type 2 diabetes to help regulate blood sugar, and early results showed a significant effect on weight reduction. Because of this, it received approval in 2023 as a medication for obesity.

The treatment is taken once a week using a straightforward self-injection, making it easy to integrate into a regular routine.

How strong are the results with Mounjaro

Mounjaro has delivered strong results in clinical trials. People using it consistently lost more weight than those taking other weight loss treatments.

  • On average, patients dropped 9.81 kg, just over 21 pounds, compared to placebo, and higher doses led to even greater weight loss.
  • The data shows a clear dose response. The 5 mg, 10 mg, and 15 mg doses produced progressively better outcomes.
  • A larger share of patients also hit key milestones like 5 percent, 10 percent, and 15 percent reductions in body weight than those using placebo or standard diabetes medications.

Weight loss up to 6 times more effective

Using Mounjaro KwikPen

6x

Diet and excersice only

Average Weight Loss*
Mounjaro 5 mg, 10 mg, 15 mg

These findings make it clear that people using Mounjaro tend to lose significantly more weight than those on a placebo, meaning those not receiving any active weight loss treatment.

Author Information

All medication and condition information on our site is produced by UK-qualified pharmacists and doctors.

Emily Hart

Clinical Governance Lead

Dr Ryan Collins

Director Pharmacist

Review Date

1 November 2025

Next Review

1 November 2027

Published on

7 January 2023

Last Update

1 November 2025

Frequently Asked Questions about Mounjaro for Weight Loss

What is Mounjaro and how does it support weight loss?

Mounjaro is a prescription treatment that works on the hormones that control appetite and blood sugar. By improving how your body responds to these signals, it helps reduce hunger, increase feelings of fullness, and support steady weight loss. It is taken once a week through a simple injection and is used alongside healthy eating and activity.

Mounjaro is intended for adults who meet specific medical criteria. It is usually prescribed for people with a higher BMI or those who have struggled to lose weight through diet and exercise alone. A healthcare professional will review your health history, current medications, and goals to confirm whether it is a suitable option for you.

Results vary from person to person, but clinical studies show that many patients lose significantly more weight with Mounjaro than with standard weight loss methods. People in trials lost an average of just over 9 kilograms and higher doses produced even greater reductions. Your personal results will depend on your dose, consistency, and overall lifestyle. If you want, I can make shorter versions or more medical versions for clinic sites.

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