If you have moved up to 5mg of Mounjaro and expected your appetite to reduce a lot, but you are still feeling hungry, you are not alone. It does not necessarily mean that you have done anything wrong or that the treatment is not suitable for you.
Mounjaro contains tirzepatide, which can reduce appetite, but the effect is different for everyone. Some people notice a clear change in hunger, while others continue to feel hungry at certain times of the day or towards the end of the week.
Your appetite can also be affected by habits, emotions, sleep, food choices and how much you are eating. This guide explains why you may still feel hungry on 5mg, what may help, and when it is worth speaking to your prescriber.
Key things to know
- Feeling hungry while taking Mounjaro can happen at any dose
- Appetite changes may build gradually rather than appearing straight after an injection
- Some people notice stronger appetite effects in the days after an injection and more hunger before the next dose
- Physical hunger and eating linked to habits or emotions are not always the same thing
- Protein, fibre, fluids and good sleep can support feelings of fullness
- Changes in weight and appetite can vary from person to person
- Do not change your dose, injection day or injection schedule without speaking to your prescriber
The Short Answer
Still feeling hungry on Mounjaro 5mg can happen for several reasons. You may still be adjusting to the dose, the appetite effect may not be as strong as you expected, or some of the hunger you notice may be linked to habits, emotions or your usual eating pattern.
This does not automatically mean that Mounjaro is not working for you. Your prescriber will look at your overall response, including your weight, appetite, side effects and general health, when deciding whether your treatment should change.
How Mounjaro Affects Appetite in the First Place
Mounjaro contains tirzepatide, which works on two hormone receptors called GIP and GLP 1. These hormones are involved in appetite and how your body responds to food.
Tirzepatide can slow stomach emptying and may help you feel full for longer. It also acts on areas of the brain involved in appetite regulation. These effects can reduce how much you want to eat, but they do not necessarily remove hunger completely.
The important point is that Mounjaro is not an on and off switch for appetite. How much your hunger changes can vary from person to person.
This is also why Mounjaro is used alongside a reduced calorie diet and increased physical activity for weight management. It is not intended to replace healthy eating habits or regular activity. Results can vary between individuals.
Why 5mg May Not Feel Like Much Yet
Mounjaro treatment starts at a lower dose and is increased gradually when appropriate. Your prescriber may review how you are responding and tolerating treatment before deciding whether a dose increase is suitable.
This gradual approach helps your body adjust to treatment and may help reduce the risk of side effects such as nausea, diarrhoea and vomiting.
If you have only recently moved to 5mg, it may take some time to see how you respond to the new dose. Some people notice a stronger change in appetite, while others may continue to feel hungry.
Whether your dose should change is a decision for your prescriber. Do not take more Mounjaro than prescribed or change your injection schedule yourself, as this can increase the risk of side effects.
Mounjaro Day 1 and Day 2: Why You Might Still Be Hungry
It is understandable to expect your appetite to change quickly after an injection. However, some people may not notice a clear difference in hunger on day 1 or day 2.
Tirzepatide has a half life of roughly five days. With regular weekly dosing, the amount of medicine in your body gradually builds before reaching a steady level.
Some people notice appetite changes within the first few days, while others may notice them more gradually. Your experience during the first few days does not necessarily tell you how you will respond to treatment over time.
So, if you had your injection yesterday and still feel hungry today, there is no need to assume that the medicine is not working.
Why Hunger Comes Back Later in the Week
Some people notice that their appetite feels lower for part of the week after their Mounjaro injection and then increases as the next dose gets closer.
This can happen as the amount of tirzepatide in the body changes between weekly doses. The pattern can also vary from person to person and may change as treatment continues.
A few things are worth keeping in mind:
- Keep to the injection schedule given by your prescriber
- Do not inject early or take an extra dose because you feel hungrier
- Try to include filling foods, such as protein and fibre, in your meals
- Keep drinking enough fluids throughout the day
- Pay attention to when your hunger increases and whether there is a pattern
- If late week hunger is frequent or difficult to manage, mention it at your next review
Keeping a simple note of your appetite, meals, side effects and injection days can give your prescriber useful information about how you are responding to 5mg.
Physical Hunger Versus Head Hunger
It can help to work out what type of hunger you are experiencing. Not all hunger comes from the same place, and Mounjaro may not affect every type of urge to eat in the same way.
Physical hunger usually builds gradually. You may notice an empty feeling in your stomach, lower energy or other signs that you need food. It is generally satisfied by eating and tends to ease after a meal. Tirzepatide may help reduce this type of appetite by affecting the signals involved in hunger and fullness.
Habitual or emotional hunger can feel different. It may appear suddenly, be linked to a particular food, or happen when you are stressed, bored, tired or following a familiar routine. You may also want to eat even when you are not physically hungry.
Some people find that when their physical appetite becomes easier to manage, these other eating urges become more noticeable. This does not necessarily mean that Mounjaro is not working. It may simply mean that different reasons for eating are becoming easier to recognise.
Knowing what is behind your hunger can help you decide what may be useful. Regular, balanced meals can help with physical hunger, while changes to routines, sleep, stress management and structured support may help with habitual or emotional eating. If you are finding these urges difficult to manage, speak to your prescriber or another healthcare professional for appropriate support.
Reasons You Might Still Feel Hungry on Mounjaro
| Reason | Why it happens | What tends to help |
|---|---|---|
| Early in treatment | Levels have not reached steady state | Consistency and time |
| Position in the weekly cycle | Drug levels fall before the next dose | Same injection day each week |
| Individual variation | Response to appetite signalling differs between people | Track weight, not hunger |
| Not enough protein | Protein is the most satiating macronutrient | Protein at every meal |
| Not enough fibre | Fibre slows digestion and prolongs fullness | Vegetables, pulses, wholegrains |
| Dehydration | Thirst is frequently misread as hunger | Regular fluid through the day |
| Poor sleep | Raises hunger hormones and lowers satiety hormones | Prioritise sleep consistency |
| Refined carbohydrate meals | Blood sugar rises then falls, triggering hunger | Pair carbohydrates with protein |
| Alcohol | Adds calories and lowers dietary restraint | Reduce frequency and quantity |
| Skipping meals | Creates a hunger rebound later in the day | Eat at regular intervals |
| Weight loss itself | The body increases hunger signalling as weight falls | Expected, discuss at review |
| Stress | Raises cortisol, which influences appetite | Manage where possible |
| Menstrual cycle | Appetite commonly rises in the luteal phase | Anticipate rather than react |
| Storage or injection issues | Degraded or incompletely delivered medicine | Check pen and storage, see below |
Practical Steps That Can Help
You do not need to change your Mounjaro dose just because you are still feeling hungry. There are several simple things you can try as part of your usual eating and lifestyle routine.
Put Protein First
Protein can help you feel fuller after meals and is an important part of a balanced diet. It can also help support muscle mass while you are losing weight.
A practical target sometimes used in weight management is around 25 to 30g of protein per meal, working towards around 80 to 100g per day for some adults. However, your individual needs can vary depending on factors such as your body size, activity levels and overall diet.
Good sources of protein include chicken, fish, eggs, Greek yoghurt, cottage cheese, tofu, beans, lentils and lean meat.
If you are unsure how much protein you need, a dietitian or healthcare professional can give you advice based on your individual needs.
Add Fibre and Keep Fluids Up
Fibre can help you feel fuller and is an important part of a balanced diet. You can get fibre from vegetables, pulses, wholegrains, nuts and seeds.
Increase your fibre intake gradually, especially if Mounjaro already causes digestive symptoms such as bloating or constipation. Increasing it too quickly may make these symptoms worse.
It is also important to drink enough fluids throughout the day. Sometimes thirst can feel similar to hunger, so keeping up with your fluids may help you understand what your body needs.
There is no single amount of fluid that everyone needs. Your needs can vary depending on factors such as your activity level, the weather and your diet.
Protect Your Sleep
Poor sleep can affect appetite and make it harder to manage food cravings the next day. Research suggests that sleep can influence hormones involved in hunger and fullness.
Aim for a regular sleep routine and try to get enough sleep for your individual needs. If you regularly struggle with sleep, speak to your GP or another healthcare professional for advice.
Eat With Some Structure
When your appetite is lower, it can be tempting to eat very little during the day and then find yourself very hungry later.
Having regular, balanced meals may help you avoid becoming overly hungry. You do not need to eat simply because it is a certain time, but planning meals and snacks can make it easier to get enough nutrition throughout the day.
If you regularly find yourself very hungry in the evening, look at what you have eaten earlier in the day. You may need more filling foods, rather than assuming that your Mounjaro dose is not working.
Does Still Feeling Hungry Mean Mounjaro Is Not Working?
Not necessarily. Feeling hungry is only one part of how you respond to Mounjaro.
Some people may lose weight while still experiencing hunger, while others may notice a large change in appetite but little change in their weight. Your response can vary depending on several factors.
Your prescriber will usually consider your overall progress, including changes in weight, how you are tolerating treatment and whether the treatment remains suitable for you. Hunger can provide useful information, but it is not the only measure of how you are responding.
If you are concerned that your weight has not changed as expected, or you are regularly struggling with hunger despite following your treatment plan, speak to your prescriber. They can review your progress and decide whether any changes are appropriate.
It can also help to track your progress in a simple way. For example, you could weigh yourself under similar conditions once a week rather than focusing on daily changes. You can also note changes in your waist measurement, clothing fit, appetite and any side effects.
What People Report at 5mg
If you have searched for Mounjaro 5mg reviews, you will probably see very different experiences. That is not surprising because people can respond differently to the same dose.
Some people report a noticeable reduction in appetite at 5mg. Others notice a smaller change or continue to feel hungry, while some notice a greater effect after moving to a different dose.
Online experiences can be useful for seeing what other people have experienced, but they should not be used to predict how Mounjaro will work for you. People are also more likely to share unusual or difficult experiences online.
A more useful comparison is your own progress over time. Look at changes in your weight, eating habits, appetite, side effects and how you feel overall. If you are unsure whether your response is as expected, your prescriber can help you assess it.
Still Hungry on Mounjaro 15mg?
If you have reached 15mg and are still experiencing significant hunger, it is worth discussing this with your prescriber.
First, 15mg is the highest licensed dose of Mounjaro. It is not a target that everyone needs to reach, and reaching the highest dose does not mean that treatment has been more successful. Many people may respond to lower doses.
If you are still losing weight while experiencing some hunger, your prescriber may consider this part of your overall response to treatment. Feeling hungry does not automatically mean that Mounjaro is not working.
If your weight is not changing despite taking Mounjaro as prescribed, this is something to discuss with your prescriber. There is no higher dose to move to, so they may review factors such as your eating pattern, activity, sleep, side effects and other medicines. They can also discuss whether another approach among the available weight loss treatment options may be suitable for you.
Most importantly, a different response to treatment does not mean that you have failed. Weight management medicines can affect people differently.
The Opposite Problem: Not Hungry at All on Mounjaro
Some people experience a very strong reduction in appetite while taking Mounjaro. If you are eating very little because you rarely feel hungry, it is important to make sure you are still getting enough food and fluids.
Eating too little for a prolonged period can make it harder to get enough protein, vitamins and minerals. It may also contribute to tiredness, weakness, dizziness or loss of muscle mass.
If your appetite is very low, try to follow a regular eating routine rather than relying entirely on hunger signals. Focus on nutritious foods that provide protein, fibre and other important nutrients, and keep your fluid intake up.
Speak to your prescriber if you are regularly struggling to eat, losing weight very quickly, feeling faint or dizzy, or experiencing persistent vomiting. Severe abdominal pain that does not go away, particularly if it spreads to your back or occurs with vomiting, needs urgent medical assessment.
The aim of treatment is not to remove your appetite completely. It is to support healthier eating and weight management while keeping you well nourished and hydrated.
Checking Your Pen and Storage
If you are concerned that Mounjaro is not having the expected effect, it is also worth checking that your pen has been stored and used correctly.
Unopened Mounjaro KwikPens should be stored in a refrigerator at 2°C to 8°C. Do not freeze the medicine. A pen that has been frozen should not be used, even if it has thawed. Mounjaro should also be protected from excessive heat and direct sunlight.
The KwikPen needs to be prepared and used according to the instructions supplied with your medicine. Make sure you follow the instructions for priming and injecting so that the full dose is delivered.
If you are unsure whether you received the full dose, do not take another dose to make up for it. Contact your prescriber or the pharmacy that supplied your Mounjaro for advice.
When to Speak to Your Prescriber
It is worth arranging a review if you have been taking your current dose as prescribed and are concerned that your appetite or weight has not changed, if hunger is making it difficult to follow your treatment plan, or if you are experiencing side effects that are difficult to manage.
It can help to bring specific information to your review. You could note your weight over the past four to eight weeks, your usual eating pattern, which days of the week you feel most hungry, your sleep and any side effects you have experienced.
This gives your prescriber a clearer picture of how you are responding than simply saying that you are still hungry.
Mounjaro is a prescription medicine and treatment should be based on an individual clinical assessment. Your prescriber can help you decide whether your current dose remains suitable and whether any changes to your treatment are appropriate.
Medical Disclaimer
This article provides general information for people who are already receiving prescribed tirzepatide treatment. It does not replace the patient information leaflet supplied with your medicine or advice from your prescriber.
Do not use this information to start, stop, increase, decrease or change the timing of your Mounjaro dose. Appetite responses can vary between individuals, and the amount of appetite suppression does not reliably predict how much weight someone will lose.
Mounjaro is a prescription only medicine in the UK and is supplied following an individual clinical assessment by an appropriately qualified prescriber. Your prescriber will decide whether treatment is suitable for you.
If you are eating very little, losing weight very quickly, feeling faint, vomiting persistently or experiencing severe abdominal pain that does not settle, seek medical advice promptly rather than relying on information published online.