How long does Mounjaro take to work? What to expect week by week

Mounjaro is one of the most popular weight loss treatments available. It can help suppress appetite and reduce food noise, which in turn makes it easier to follow a reduced-calorie diet.

It has been proven to help people lose up to 22.5% of their body weight when taken for 72 weeks.

How long do you have to wait to see results? Do you have to take it for 72 weeks? Does weight drop off straight away? Read on to learn more about the weight loss timeline to expect, whilst on Mounjaro.

When does Mounjaro start working?

Mounjaro begins working in the body soon after the first injection, but the effects you feel and the results you see don’t happen all at once. The active ingredient tirzepatide, starts influencing appetite, fullness, and blood sugar within days of it being administered.

Visible weight loss occurs much later. In fact data from clinical studies show that meaningful, sustained weight loss builds gradually, over months. This varies between individuals, based on their starting weight and how strictly they have implemented lifestyle changes.

Dosing timeline

All patients new to Mounjaro start on the initiation dose, which is gradually increased. This allows the body to adjust to life on treatment, minimising side effects whilst doing so.

The treatment is administered once-weekly. Each device contains 4 doses and is increased as follows:

Each increase occurs no sooner than every four weeks, allowing your body to adjust gradually.

Additionally, some patients find they do not need to increase the dose each month. If a lower dose is helping achieve weight loss with minimal side effects, they are encouraged to maintain at the current dose.

At Quick meds, we monitor patients after each course to ensure you get the most from your treatment in a safe manner.

Weight loss timeline

Getting Started - First days

The first few days at the starter dose (2.5mg) is when patients are more likely to experience side effects. This is a sign the body has recognised a new chemical which it is adjusting to.

This is your time to start fine tuning lifestyle changes:

• Listen to hunger cues - only eat when hungry, stop when full

• Make sensible food choices - prioritise protein and fibre, whilst cutting out carbohydrates

• Make sure you remain hydrated

• Regular exercise can help maximise your results

The initiation dose is not classed as a therapeutic dose. Its primary use is to prepare the body for the higher doses, reducing the risk of side effects. However, some patients in clinical trials reported an average 1-4% weight loss during this period

When it works

Once the dose has increased to 5mg at week 5, you may start to notice more weight loss. Participants in clinical trials reported an average 5-6% weight loss by this point.

Whilst some patients may decide to continue at 5mg, others may need to increase the dose further, at week 9, to 7.5mg. At this point, you’re likely to lose an average of 9-12%.

Other noticeable changes include clothes that start to get looser, and you may realise it's easier to eat less, feeling more in control of your diet.

Months 4 to 6

By week 13, many patients increase to the 10mg dose. At doses of 10mg or higher, you're likely to experience significant weight loss if you stick to your diet and exercise routine.

At this dose you may have lost around 13% of your starting weight. Continuing to increase consistently up to15mg shows a potential weight loss of 15% at 24 weeks and then 22.5% at 72 weeks.

Typical weight loss on Mounjaro varies between patients. Data from trials shows an average weight loss. Patients more likely to lose the most weight are those who:

• Have a higher initial weight

• Implement sustainable lifestyle changes

Long term maintenance

For long-term weight loss, emphasis on sustainable lifestyle modifications cannot be understated. Incorporating healthy habits at the onset of your treatment can help maximise not only weight loss but also help maintain the healthy weight once reached.

Once at goal weight, some patients decide to gradually come off the treatment, slowly adjusting to life without appetite suppression. For these patients, sticking to healthy habits can help prevent regaining the lost weight.

Others decide to use a maintenance dose long-term to help keep weight off. Licensed maintenance doses are 5mg, 10mg and 15mg. However, working with the team at Quick Meds, you can maintain at in-between doses should this be clinically appropriate.

When maintaining, a clinician would consider ongoing benefits of treatment against risks of side effects or tipping towards an unhealthy low weight.

Individual Factors Influencing Mounjaro Results

Everybody will respond to Mounjaro in different ways and will have a different experience. This can be due to many different factors including:

• Your starting weight - those with a higher starting weight may lose a higher percentage.

• Age - as we get older, metabolism naturally slows down.

• Sex - data from trials shows women may lose slightly more weight than men.

• Dose adherence - Taking the medication exactly as prescribed

• Diet - how tightly you stick to dietary modifications

• Exercise - how regularly you exercise to burn excess fat

• Underlying health conditions that hinder weight loss, including: diabetes, PCOS, thyroid disorders and other conditions that affect your metabolism or hormone levels.

To ensure you are getting the most out of treatment, it's important to work with your healthcare provider, using the medication exactly as advised**,** emphasising sustainable lifestyle modifications.

Contact us today for more information about the foods to eat, foods to avoid and other lifestyle changes you can make for effective weight management.

Plateau

Reaching a plateau when losing weight is normal, and you should not worry. To reinvigorate your journey and maximise your medication’s effectiveness, incorporate some of the below proven strategies

• Optimise diet

  • Reduce refined carbohydrates and sugars

  • Limit saturated fats

  • Ensure hydration and limit alcohol

  • Avoid snacking in between meals or in the evening

• Exercise

  • Increase workout intensity, pushing to work up a sweat

  • Boost your daily step count, pushing through your limits

  • Always exercise within your safe limits, preventing injury

• Rest

  • Ensure you get enough sleep