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Imcivree 10 mg / ml solution for injection – patient leaflet, side effects, dosage

Last updated: · Text from the MHRA, as of · About this document

Medicine status: Prescription only (POM) Details

Medicine strength:
10 mg / ml
Contains active substance:

Patient leaflet - Imcivree 10 mg / ml solution for injection

1. What IMCIVREE is and what it is used for

IMCIVREE contains the active substance setmelanotide. It is used to treat obesity and control hunger in adults and children of 4 years and above with acquired hypothalamic obesity (aHO) which results from injury or impairment of an area of the brain called the hypothalamus.

IMCIVREE is also used in adults and children of 2 years and above, to treat obesity caused by certain genetic diseases that affect how your brain controls feelings of hunger.

The genetic diseases this medicine is used to treat are:

  • POMC (pro-opiomelanocortin) deficiency
  • PCSK1 (proprotein convertase subtilisin/kexin type 1) deficiency • LEPR (leptin receptor) deficiency
  • Bardet-Biedl syndrome (BBS).

People with these diseases lack certain natural substances involved in controlling appetite or these substances do not work properly. This increases hunger levels and leads to obesity. The medicine helps to restore control of appetite and reduces symptoms of the disease.

2. What you need to know before you use IMCIVREE

Do not use IMCIVREE

  • if you are allergic to setmelanotide or any of the other ingredients of this medicine (listed in section 6).

Warnings and precautions

Talk to your doctor, pharmacist or nurse before using this medicine.

Before you start and during treatment with this medicine your doctor should examine your skin for any markings or dark areas. Whilst you are using this medicine you may get more marks or dark patches on your skin. A check before you start treatment will help you identify any new marks that appear once you have used this medicine.

It is very common (may affect more than 1 in 10 people) for male patients to get spontaneous erections of the penis when using this medicine. If an erection lasts more than 4 hours, please see a doctor urgently. Prolonged erections (priapism) can reduce your ability to get erections in the future if not treated.

Children

Do not give this medicine to children under the age of 4 years if they have aHO. Do not give this medicine to children under the age of 2 years if they have POMC, PCSK1, or LEPR deficiency or BBS.

There is no information on use in children below these ages.

Other medicines and IMCIVREE

Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines.

Pregnancy and breast-feeding

If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before using this medicine.

It is not recommended to use this medicine when pregnant or while trying to get pregnant, as it has not been studied in pregnant women. Weight loss during pregnancy can harm the baby.

Talk to your doctor before using this medicine if you are breast-feeding. Your doctor will discuss with you the benefits and risks of using this medicine during this time.

Driving and using machines

This medicine has no or only a minor effect on your ability to drive or use machines, due to drowsiness.

IMCIVREE contains benzyl alcohol

This medicine contains 10 mg benzyl alcohol in each 1 ml which is equivalent to 1 mg for each mg of your dose.

Benzyl alcohol has been linked with the risk of severe side effects in young children (less than 3 years old). There is an increased possibility that benzyl alcohol could build-up in their body (called “metabolic acidosis”) leading to “gasping syndrome”. Children aged 2 years old should be monitored by their doctor for signs of this build-up (including rapid heartbeat, rapid breathing, or confusion).

Benzyl alcohol may cause allergic reactions.

Ask your doctor or pharmacist for advice if you are pregnant or breast-feeding or if you have a liver or kidney disease. This is because benzyl alcohol can build-up in your body and may cause side effects (called “metabolic acidosis”).

IMCIVREE contains sodium

This medicine contains less than 1 mmol sodium (23 mg) per dose, that is to say essentially “sodium-free”.

3. How to use IMCIVREE

Always use this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.

This medicine is given as an injection under the skin, once a day, at the start of the day. The medicine is for long-term use.

Your doctor will advise you on the correct dose to inject.

The daily recommended dose based on your age, weight and the treatment week are provided in the tables below. There are different dosage tables depending on the disease that you are taking this medicine to treat. Make sure to check the correct table for your recommended dose.

Your doctor will regularly monitor you whilst you are taking this medicine to see if your dose needs to change. Following your starting dose your doctor will advise if you should increase your dose to the next level based on how well the treatment is working and any side effects you may be experiencing. In some circumstances your doctor may advise to lower your dose. Check with your doctor if you are not sure about your current dosage.

Detailed instructions on how to inject your dose of IMCIVREE are provided after the dosage tables.

Acquired hypothalamic obesity (aHO)

The recommended doses are as follows:

Adults and children aged 6 years or more
Treatment weekDaily doseVolume to be injected
Week 10.5 mg0.05 ml
Week 21 mg0.1 ml
Week 32 mg0.2 ml
Week 4 and onward3 mg0.3 ml
Children aged 4 to less than 6 years
Treatment weekDaily doseVolume to be injected
Patient weight is less than 20 kg
Week 10.5 mg0.05 ml
Week 21 mg0.1 ml
Week 3 and onward1.5 mg0.15 ml
Patient weight is 20 to less than 25 kg
Week 10.5 mg0.05 ml
Week 21 mg0.1 ml
Week 31.5 mg0.15 ml
Week 4 and onward2 mg0.2 ml
Patient weight is 25 to less than 30 kg
Week 10.5 mg0.05 ml
Week 21 mg0.1 ml
Week 31.5 mg0.15 ml
Week 42 mg0.2 ml
Week 5 and onward2.5 mg0.25 ml
Patient weight is 30 kg or more
Week 10.5 mg0.05 ml
Week 21 mg0.1 ml
Week 32 mg0.2 ml
Week 4 and onward3 mg0.3 ml

Pro-opiomelanocortin (POMC), proprotein convertase subtilisin/kexin type 1 deficiency (PCSK1) and leptin receptor (LEPR) deficiency

The recommended doses are as follows:

Adults and children aged 12 years or more
Treatment weekDaily doseVolume to be injected
Weeks 1-21 mg0.1 ml
Week 3 and onward2 mg0.2 ml
Additional possible doses as guided by your doctor2.5 mg0.25 ml
3 mg0.3 ml
Children aged 6 to less than 12 years
Treatment weekDaily doseVolume to be injected
Weeks 1-20.5 mg0.05 ml
Weeks 3-41 mg0.1 ml
Week 5 and onward2 mg0.2 ml
Additional possible dose as guided by your doctor2.5 mg0.25 ml
Children aged 2 to less than 6 years

Treatment week Daily dose Volume to be injected

Patient weight is less than 20 kg

Week 1 and onward0.5 mg0.05 ml
Patient weight is 20 to less than 30 kg
Weeks 1-20.5 mg0.05 ml
Week 3 and onward1 mg0.1 ml
Patient weight is 30 to less than 40 kg
Weeks 1-20.5 mg0.05 ml
Weeks 3-41 mg0.1 ml
Week 5 and onward1.5 mg0.15 ml
Patient weight is 40 kg or more
Weeks 1-20.5 mg0.05 ml
Weeks 3-41 mg0.1 ml
Weeks 5-61.5 mg0.15 ml
Weeks 7-82 mg0.2 ml
Week 9 and onward2.5 mg0.25 ml

Bardet-Biedl syndrome (BBS)

The recommended doses are as follows:

Adults and children aged 16 years or more
Treatment weekDaily doseVolume to be injected
Weeks 1-22 mg0.2 ml
Week 3 and onward3 mg0.3 ml
Children aged 6 to less than 16 years
Treatment weekDaily doseVolume to be injected
Week 11 mg0.1 ml
Week 22 mg0.2 ml
Week 3 and onward3 mg0.3 ml
Children aged 2 to less than 6 years
Treatment weekDaily doseVolume to be injected
Patient weight is less than 20 kg
Week 1 and onward0.5 mg0.05 ml
Patient weight is 20 to less than 30 kg
Weeks 1-20.5 mg0.05 ml
Week 3 and onward1 mg0.1 ml
Patient weight is 30 to less than 40 kg
Weeks 1-20.5 mg0.05 ml
Weeks 3-41 mg0.1 ml
Week 5 and onward1.5 mg0.15 ml
Patient weight is 40 kg or more
Weeks 1-20.5 mg0.05 ml
Weeks 3-41 mg0.1 ml
Weeks 5-61.5 mg0.15 ml
Weeks 7-82 mg0.2 ml
Week 9 and onward2.5 mg0.25 ml

Patients with kidney disease

In patients with POMC, PCSK1 or LEPR deficiency or BBS and mild or moderate kidney disease, there are no changes required to the recommended dose.

In patients with aHO and mild kidney disease, there are no changes required to the recommended dose. Patients with aHO and moderate kidney disease should follow the doses recommended for patients with severe kidney disease. For patients with severe kidney disease the recommended doses are as follows:

Adults and children aged 12 years or more (POMC, PCSK1 or LEPR deficiency or aHO) or 16 years or more (BBS)

Treatment weekDaily doseVolume to be injected
Weeks 1-20.5 mg0.05 ml
Week 3 and onward1 mg0.1 ml
Additional possible doses as guided by your doctor2 mg0.2 ml
2.5 mg0.25 ml
3 mg0.3 ml
Children aged 6 to less than 12 years (POMC, PCSK1 or LEPR deficiency or aHO) or 6 to less than 16 years (BBS)
Treatment weekDaily doseVolume to be injected
Weeks 1-20.25 mg0.025 ml
Weeks 3-40.5 mg0.05 ml
Week 5 and onward1 mg0.1 ml
Additional possible dose as guided by your doctor2 mg0.2 ml
Children aged less than 6 years
Treatment weekDaily doseVolume to be injected
Patient weight is less than 20 kg
Week 1 and onward0.25 mg0.025 ml
Patient weight is 20 to less than 30 kg
Weeks 1-20.25 mg0.025 ml
Week 3 and onward0.5 mg0.05 ml
Patient weight is 30 to less than 40 kg
Weeks 1-20.25 mg0.025 ml
Weeks 3-40.5 mg0.05 ml
Week 5 and onward1 mg0.1 ml
Patient weight is 40 kg or more
Weeks 1-20.25 mg0.025 ml
Weeks 3-40.5 mg0.05 ml
Weeks 5-61 mg0.1 ml
Weeks 7 and onward1.5 mg0.15 ml

IMCIVREE 10 mg/ml solution for injection

setmelanotide M120256AF

VV-LAB-000854 V1.0 How to inject IMCIVREE

This medicine is injected under the skin, in the area around the belly button. Your doctor, pharmacist or nurse will show you how to do this. Once you are comfortable injecting yourself or your child, you will be able to do this at home.

This medicine should be injected at the start of your day. This medicine can be taken without regard to the timing of your meals.

Before injecting this medicine, please read the following instructions carefully.

Step 1. Prepare for the injection

  • Get the items you will need and place on a clean, flat surface. You will need the following items that are supplied separately:
  • Wash your hands with soap and warm water.
  • Open the 2 alcohol wipes and the gauze pad.

Step 2 Examine the vial

  • Check the expiry date on the vial label, this is shown after ‘EXP’: MM/YYYY.
  • The liquid should look clear to slightly yellow.
  • Do not use if:

    • the expiry date has passed
    • the liquid is cloudy
    • there are particles floating in the vial
    • the plastic cap on a new vial is broken or missing - the vial has been stored at temperatures greater than 30 °C. Step 3. Prepare the vial
  • Before use, let the vial reach room temperature. Remove the vial from the refrigerator 15 minutes before injection or roll the vial gently between the palms of your hands for 60 seconds. - Do not use warm water, a microwave or other appliance to heat the vial

    • Do not shake the vial
  • If using a new vial, remove the plastic cap and throw it away in your household waste.
  • Clean the top of the grey vial stopper with an alcohol wipe. Throw away the used alcohol wipe in your household waste. - Do not remove the vial stopper

Step 4. Prepare the syringe

  • For doses of 0.25 mg (0.025 ml or 2.5 units), use a 0.3 ml syringe with 0.5 (half) unit increments and a 29 to 31 gauge needle with a 6 to 13 mm needle length, suitable for injection under the skin.
  • For doses of 0.5 mg to 3 mg (0.05 ml to 0.3 ml), use a 1 ml syringe with 0.01 ml dosing increments and a 28 to 29 gauge needle with a 6 to 13 mm needle length, suitable for injection under the skin.
  • Keep the protective needle cap on and pull back the plunger to fill the syringe with air equal to the amount of the medicine to be used.
  • Remove the needle cap from the syringe. Pull the cap straight off and away from your body.
  • Place the vial upright on a flat surface. Hold the syringe and place it directly over the vial. Insert the needle straight down into the centre of the grey vial stopper.
  • Push the plunger down to inject the air from the syringe into the vial.
  • Without removing the needle, gently turn the vial upside down.

    • Make sure the tip of the needle is fully in the medicine liquid and not in the air above the liquid.
  • Slowly pull back the plunger to fill the syringe with the amount of medicine needed for your dose. When measuring your dose, be sure to read the units starting from the end closest to the black rubber stopper.

    • Keep the needle in the vial and check for any large air bubbles in the syringe.
    • If you see air bubbles these will need to be removed from the

      syringe. To remove:

      • Gently tap the side of the syringe with your finger to move

        the air bubble to the top of the syringe.

      • Empty the syringe back into the vial.
      • Follow the above steps to fill your syringe again. Pull the plunger more slowly this time and make sure the tip of the needle is always fully in the liquid in the vial to reduce the chance of air bubbles.
    • Once there are no large air bubbles in the syringe, place the vial upright on a hard surface.
    • Hold the vial with one hand and the barrel of the syringe

      between the fingertips of your other hand. Pull the needle

      straight up and out of the vial.

    • Place the syringe on the hard surface, make sure the needle

      does not touch the surface. Do not recap the needle.

Step 5. Prepare the injection site

  • Choose the area around your belly button for the injection.

    • Change your injection site each day.
    • Make sure the injection site is at least 5 cm away from the

      belly button.

    • Do not inject an area that is red, swollen, or irritated.
  • Clean your chosen injection site with your second alcohol wipe using a circular motion. - Allow the skin to dry for about 10 seconds.
  • Do not touch, fan, or blow on the cleaned area.

Step 6. Injecting IMCIVREE

  • Place the syringe between your thumb and index finger of the hand you write with.
  • With your other hand, gently pinch about 5 cm of skin

    between your thumb and index finger. Make sure you hold the skin fold until the injection is complete.

  • Hold the middle of the syringe at a 90º angle to your skin and

    push the needle straight into the injection site, making sure

    the needle goes in all the way.

  • Do not hold or push on the plunger while inserting the needle.
  • Holding the barrel of the syringe between your thumb and

    middle finger, use your index finger to slowly push the plunger to inject the medicine.

  • Count to 5 after injecting this medicine to make sure all the

    medicine has left the syringe.

  • Let go of the pinched skin and pull the needle out.
  • Use a gauze pad to gently apply pressure to the injection site,

    then throw the gauze pad into your household waste.

  • Place your used syringe in the sharps bin. Do not throw away in your household waste.
  • If you still have medicine left in your vial, place the vial back in the carton and store either in your refrigerator or in a safe place at a temperature of less than 30 °C until it is time for your next dose.

If you use more IMCIVREE than you should

If you or your child use more of this medicine than you should, contact your doctor.

If you forget to use IMCIVREE

If you forget to inject the medicine, skip the dose and inject your next dose at the usual time. Do not use a double dose to make up for a forgotten dose.

If you stop using IMCIVREE

This medicine is intended for long-term use. If you stop using this medicine your hunger may return and your weight loss may stop. Make sure to follow the dosing schedule as instructed by your doctor or pharmacist.

If you have any further questions on the use of this medicine, ask your doctor, pharmacist or nurse.

4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

Very common (may affect more than 1 in 10 people)

  • Mole on your skin
  • Headache
  • Feeling sick (nausea)
  • Being sick (vomiting)
  • Dark areas or patches on your skin
  • Spontaneous penile erections
  • Increased penile erections
  • Pain, bruising or inflammation (redness and/or swelling) at the site of injection
  • Feeling tired

    Common (may affect up to 1 in 10 people)

    • An excess of eosinophils, a type of white blood cell
    • Feeling depressed
    • Trouble sleeping
    • Disturbance in sexual arousal
    • Increased sexual desire
    • Feeling dizzy
    • Diarrhoea
    • Stomach pain
    • Dry mouth
    • Indigestion
    • Feeling constipated
    • Heartburn
    • Flatulence
    • Blood tests showing increased liver enzyme levels
    • Dry, red or itchy skin
    • Rash
    • Lesions on your skin
    • Hair loss
    • Joint aches
    • Back pain
    • Muscle pain
    • Female genital discomfort
    • Feeling weak
    • Pain

Uncommon (may affect up to 1 in 100 people)

  • Irregular mole on your skin
  • Appetite disorders
  • Feeling thirsty
  • Sleep disorder
  • Nightmares
  • Decreased sexual desire
  • Drowsiness
  • Migraine headache
  • Loss or change in sense of smell
  • Taste disorders
  • Discolouration of the white part of the eyes
  • Vertigo
  • Hot flush
  • Yawning
  • Runny nose
  • Cough
  • Stomach bloating
  • Stomach discomfort
  • Increase in saliva
  • Redness of the skin
  • Lines or streaks on your skin
  • Increased sweating
  • Abnormal distribution of fat tissue
  • Itchy rash
  • Flaky skin
  • Changes in hair colour
  • Discoloured nails
  • Patches of skin that are darker and thicker than usual
  • Pain in the muscles or bones
  • Muscle cramps
  • Pain in arms or legs
  • Blood tests showing increased muscle enzyme levels
  • Female inability to achieve or maintain sexual arousal
  • Genital pain, discomfort or sensitivity
  • Female genital disorder
  • Period pains
  • Sensitivity to hot or cold (feeling hot or cold)
  • Chills

Reporting of side effects

If you get any side effects, talk to your doctor, pharmacist, or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via Yellow Card Scheme, Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects, you can help provide more information on the safety of this medicine.

5. How to store IMCIVREE

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the carton and vial after ‘EXP’. The expiry date refers to the last day of that month.

This medicine should be stored in a refrigerator at 2 °C to 8 °C until the expiry date on the carton and vial. Alternatively, this medicine may be kept at room temperature, no warmer than 30 °C, for up to 30 days or until the expiry date, whichever is sooner. Store all vials (even those you have opened) in the original carton to protect them from light. After you first use a vial, discard after 28 days.

Do not freeze this medicine.

If this medicine is exposed to temperatures above 30 °C do not use and discard according to local guidelines. Do not use this medicine if you notice floating particles or cloudiness. Always use a new syringe for each injection.

Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

6. Contents of the pack and other information

What IMCIVREE contains

  • The active substance is setmelanotide. Each multidose vial contains 10 mg setmelanotide in 1 ml of solution.

The other ingredients are:

What IMCIVREE looks like and contents of the pack

IMCIVREE is a clear colourless to slightly coloured solution. This medicine comes in clear glass vials with a stopper and cap, containing 1 ml of solution for injection.

Marketing Authorisation Holder and Manufacturer

Rhythm Pharmaceuticals Netherlands B.V.

Radarweg 29

1043NX Amsterdam

Netherlands

This leaflet was last revised in April 2026.

large

air

bubbles

small

air

bubbles

0.25 mg dose = 0.025 ml = 2.5 units

1 mg dose = 0.1 ml

2 mg dose = 0.2 ml 3 mg dose = 0.3 ml 0.5 mg dose = 0.05 ml

5 cm

90°

VV-LAB-000854 V1.0

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PLGB 55587/0001

Last revision stated in the text: April 2026 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Imcivree 10 mg / ml solution for injection

Prescription needed? Yes, prescription-only medicine (POM)
Active substance Setmelanotide
Strength 10 mg / ml
Pharmaceutical form Solution for injection
Clear to slightly opalescent, colourless to slightly coloured solution.
How is it taken Subcutaneous
Excipients N-(carbonyl-methoxypolyethylene glycol 2000)-1,2-distearoyl- glycero-3-phosphoethanolamine sodium salt (mPEG-2000-DSPE), Carmellose sodium, Mannitol, Phenol, Benzyl alcohol, Disodium edetate, Water for injections, Hydrochloric acid (for pH-adjustment), Sodium hydroxide (for pH-adjustment)
Pack sizes 1 vial
Is it available? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Shelf life 3 years
After first opening
28 days or until the expiry date (whichever is earlier).
Do not store above 30 °C.
Chemical and physical in use stability has been demonstrated for 28 days at 2 °C to 30 °C.
From a microbiological point of view, once opened, the product may be stored for a maximum of 28 days at 2 °C to 30 °C. Other in-use storage times and conditions are the responsibility of the user.
Storage Store in a refrigerator (2°C to 8°C). Do not freeze. Store in the original carton in order to protect from light.
Unopened vials may be kept at room temperature, not to exceed 30°C, for up to 30 days.
For storage conditions after first opening of the medicinal product, see section 6.3.
Drug group (ATC) Anti-obesity preparations, excl. diet products, centrally acting anti-obesity products
  1. A Alimentary tract and metabolism drugs
    1. A08 Antiobesity preparations, excl. diet products
      1. A08A Antiobesity preparations, excl. diet products
        1. A08AA Centrally acting antiobesity products
Marketing authorisation PLGB 55587/0001 (first authorised 23 April 2026)
Marketing authorisation holder Rhythm Pharmaceuticals Netherlands B.V.
Codes GTIN 8720682100028 · BNF 04050200

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 10.2.0 of 19 October 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.