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Everything you need to know about Mounjaro
Everything you need to know about Mounjaro

Our most asked questions about the Mounjaro weight loss medication

Anna avatar
Written by Anna
Updated over a week ago

What is Mounjaro?

Mounjaro (tirzepatide) is an injectable prescription medicine that can help people lose weight and keep it under control.

How does Mounjaro work?

Mounjaro mimics the action of two naturally occurring hormones known as GLP-1 and GIP. It works on areas of the brain that control appetite and slows down digestion, helping you to eat less and feel fuller for longer.

Who is eligible for Mounjaro?

Mounjaro is suitable for adults with obesity (BMI ≥30), or some adults with excess weight (BMI ≥27) (overweight) who also have weight-related medical problems to help them lose weight and keep it off. Mounjaro should be used alongside a reduced-calorie meal plan and increased physical activity.

How soon can I expect to lose weight with Mounjaro?

People respond to medicines differently, so there is no set time for when you can expect to see results with Mounjaro. The medication starts working as soon as you start taking it, so you should begin to see results within a few weeks.

How much weight can you lose with Mounjaro?

  • One study found that Mounjaro supported average weight loss of nearly 25% after one year

  • Research suggests the percentage of participants on Mounjaro achieving more than 10% weight loss is considerably higher than Wegovy.

  • A randomised controlled trial in 670 people showed that 92% of participants on Mounjaro achieved more than 10% weight loss, with 84% achieving more than 15%.

How often is Mounjaro taken?

Mounjaro is taken once a week, any time of day, with or without food.

How do I take Mounjaro?

Mounjaro is injected under the skin once a week using an injection Pen.

Who shouldn't use Mounjaro?

  • If you or any of your family have ever had a type of thyroid cancer called medullary thyroid carcinoma (MTC) or if you have an endocrine system condition called Multiple Endocrine Neoplasia syndrome type 2 (MEN 2)

  • If you have had a serious allergic reaction to tirzepatide or any of the ingredients in Mounjaro

  • You shouldn't use Mounjaro if you are pregnant. If you become pregnant while taking Mounjaro, stop using it straightaway and speak to your GP or midwife.

How long do I need to take Mounjaro for?

How long it takes for Mounjaro to work will differ depending on the individual. It’s important to view weight loss as a longer-term journey, where the results of the medication are more effective when taken over a longer period.

It takes 6 months to reach the maintenance dose of 15mg, depending on how well you tolerate the medication.

Thriva’s doctors will work with you to define a personalised plan for you based around the latest guidance to support you to meet your weight loss goals.

What happens when I stop the medication?

Mounjaro alone can help you lose weight, but it won't help keep it off for good. That is why we pair medication with lifestyle, exercise and nutrition advice to help you make changes to your habits that will help you keep the weight off after you stop taking Mounjaro.

What happens if I can’t tolerate the increased dose?

If you are unable to tolerate the increase in dose, we can delay the increase in dose for another 4 weeks.

Is Mounjaro the same as Wegovy?

Mounjaro and Wegovy are different medications but they work in similar ways. Mounjaro was originally designed to treat type 2 diabetes, however it is licensed in the UK for weight loss. The active ingredient in Wegovy is semaglutide, whereas the main ingredient in Mounjaro is tirzepatide.

Mounjaro works on 2 hormones to help suppress appetite, GLP-1 and GIP. Wegovy acts on GLP-1 only. Their dosing differs slightly from one another.

Can I take Mounjaro and Wegovy at the same time?

Doing this can cause serious side effects. There is no benefit of taking both at the same time. Speak to your Thriva doctor about switching from one medication to the other.

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