Can Mounjaro Be Prescribed for Weight Loss? UK Guide (October 2026)

01 · Eligibility

Who can be prescribed Mounjaro for weight loss?

Adults who meet the licensed criteria can be prescribed it. That means a BMI of 30 or above, or a BMI between 27 and 30 with at least one weight-related condition such as high blood pressure, high cholesterol, obstructive sleep apnoea, cardiovascular disease, prediabetes or type 2 diabetes.¹ It is used alongside a reduced-calorie diet and increased physical activity. A prescriber assesses your BMI, medical history and current medicines first. Our guides on criteria to be prescribed Mounjaro and whether anyone can be prescribed it go deeper.

02 · NHS or private

NHS or private: which route?

Mounjaro is available on the NHS, but access is phased in over several years, so many people who meet the licensed criteria choose regulated private treatment rather than waiting.⁴ See whether you can be prescribed Mounjaro on the NHS and NHS weight loss injections.

Privately, the Mounjaro pen starts at £169.99 for a 4-week 2.5mg pen. New customers save £40 on their first order with code FIRST40, and an automatic £25 reorder discount applies to every future order (code DOSE25). The consultation is free, and unsuitable orders are refunded automatically.

03 · Getting started

How private prescribing works

First, complete the free online consultation. Second, a GPhC-registered prescriber reviews it; payment is taken when you place the order, and if the prescriber decides the treatment is not suitable, the order is refunded automatically in full. Third, we dispense and dispatch, same day when ordered by 3pm, with free next-day tracked delivery.

04 · What to expect

What results to expect

In the SURMOUNT-1 trial of 2,539 adults, people taking tirzepatide alongside diet and exercise lost on average 15% of body weight on 5mg, 19.5% on 10mg and 20.9% on 15mg over 72 weeks, compared with 3.1% with lifestyle changes alone.² For someone starting at 100 kg, 20.9% is about 21 kg. These are trial averages; individual results vary, and treatment works alongside diet and activity, not instead of them. See how successful Mounjaro is.

05 · How it works

How Mounjaro works

Tirzepatide activates two gut-hormone receptors, GIP and GLP-1, which help regulate appetite, slow stomach emptying and improve the body's response to insulin.¹ Most people feel fuller sooner and less hungry between meals. It is a once-weekly injection in a pre-filled KwikPen, in six strengths from 2.5mg to 15mg. For duration, see how long you can be prescribed it, or compare weight loss medication options.