Package Leaflet: Information for the Patient
Myalepta 5.8mg powder for solution for injection
metreleptin
This medicine is subject to additional monitoring, which will allow for quick identification of new safety information. You can help by reporting any side effects you may get. The last section of the leaflet includes information on how to report side effects.
Read all of this leaflet carefully before you start using this medicine, because it contains important information for you.
Contents of the pack
Myalepta contains the active substance metreleptin. Metreleptin is similar to a human hormone called leptin.
What Myalepta is used for
Myalepta is used to treat complications caused by leptin deficiency in patients with lipodystrophy.
It is used in adults, adolescents, and children 2 years of age and older:
It is used in cases where other treatments have not been effective in adults and adolescents 12 years of age and older:
How Myalepta works
Fatty tissue produces natural leptin, which has many bodily functions, such as:
Metreleptin mimics the effects of leptin. This improves the body's ability to control energy levels.
Do not use Myalepta
Warnings and precautions
Talk to your doctor, pharmacist, or nurse before starting Myalepta if
Lymphoma
People with lipodystrophy may be at risk of a type of blood cancer called lymphoma, whether or not they use Myalepta.
However, it is possible that the risk of getting lymphoma may be higher when using this medicine.
Your doctor will decide whether you should use Myalepta and will monitor you during treatment.
Severe and serious infections
During treatment with Myalepta, your body may produce antibodies that can increase the risk of developing severe or serious infections. Tell your doctor immediately if you develop a high fever, accompanied by increased tiredness (see section 4).
Hypoglycemia with insulin or other antidiabetic medicines
If you are using a medicine like insulin or other medicines to treat diabetes, your doctor will closely monitor your blood sugar levels. Your doctor may adjust the dose of insulin or other medicines if necessary.
The goal is to prevent your blood sugar levels from becoming too low ("hypoglycemia"). For signs of hypoglycemia, see section 4 "Signs of hyperglycemia and hypoglycemia".
Hyperglycemia and high blood fat levels
You may have higher blood sugar ("hyperglycemia") or fat ("hypertriglyceridemia") levels when taking Myalepta, which can be a sign that this medicine is not working as well as it should. Signs of hyperglycemia and high blood fat levels are included in section 4 "Signs of hyperglycemia and hypoglycemia" and "Signs of high blood fat levels".
If you experience any of the symptoms mentioned above, or if you are unsure, talk to your doctor immediately. Your doctor may need to change your treatment.
Autoimmune diseases
People who have or have had problems with the immune system (autoimmune diseases, including autoimmune liver problems) may experience worsening of symptoms with Myalepta. Talk to your doctor about the symptoms you may experience and which would require further testing.
Allergic reactions
You may experience an allergic reaction during treatment with Myalepta. If you experience symptoms of an allergic reaction, tell your doctor immediately. Signs of an allergic reaction can be found in section 4 under "Allergic reactions".
Fertility
Myalepta may increase fertility in women with lipodystrophy (see section "Pregnancy, breastfeeding, and fertility").
Myalepta contains sodium
This medicine contains less than 1 mmol of sodium (23 mg) per dose; this is essentially "sodium-free".
Children and adolescents
Do not give this medicine to children under 2 years of age with generalized lipodystrophy or to children under 12 years of age with partial lipodystrophy. This is because the effect of this medicine in children under these ages is unknown.
Other medicines and Myalepta
Tell your doctor if you are using, have recently used, or might use any other medicines. Myalepta may affect how other medicines work. Other medicines may also affect how Myalepta works.
Tell your doctor especially if you are taking any of the following medicines:
If any of the above applies to you (or if you are unsure), talk to your doctor before using Myalepta. Some medicines may need to be monitored while using Myalepta, as it may be necessary to adjust the dose of these medicines.
Pregnancy, breastfeeding, and fertility
If you are pregnant or breastfeeding, think you may be pregnant, or plan to become pregnant, talk to your doctor before using this medicine.
Do not use Myalepta if you are pregnant or may become pregnant. This is because the effect of this medicine on the fetus is unknown. Women of childbearing age must use effective non-hormonal contraceptive methods, such as condoms, during Myalepta use. Talk to your doctor about suitable contraceptive methods, as Myalepta may reduce the effectiveness of hormonal contraceptives in preventing pregnancy.
It is unknown whether Myalepta passes into breast milk. If you are breastfeeding or plan to breastfeed, talk to your doctor. You and your doctor will decide whether to continue breastfeeding while using this medicine, considering the benefit of breastfeeding for the baby and the benefit of Myalepta for the mother.
Myalepta may increase fertility in women with lipodystrophy.
Driving and using machines
Myalepta has a minor influence on the ability to drive and use machines. You may feel dizzy or tired when using this medicine. If this happens, do not drive or use tools or machines. If in doubt, talk to your doctor.
Follow the instructions for administration of this medicine exactly as told by your doctor. If you are unsure, talk to your doctor again.
Myalepta is an injection given once a day under the skin ("subcutaneous injection"). This medicine is used in children from 2 years of age, adolescents, and adults with generalized lipodystrophy; it is also used in children from 12 years of age, adolescents, and adults with partial lipodystrophy.
Your doctor will monitor you or your child during use of this medicine and decide on the dose you or your child should use.
Your doctor may decide that you should self-inject the medicine. Your doctor, nurse, or pharmacist will teach you how to prepare and inject the medicine.
Amount to be injected
Over time, the dose of Myalepta may change based on how this medicine works in your specific case. The Myalepta powder is dissolved by mixing it with water for injections to produce an injection solution. Read the "Instructions for use" to find out how to prepare the solution before injection.
Your doctor will have prescribed the correct dose for you based on:
Your doctor or pharmacist will tell you the amount of solution to inject. If you are unsure of the amount of solution to inject, talk to your doctor or pharmacist before injection.
If you need to inject 1 ml or more of the Myalepta solution, your doctor may instruct you to split the dose into two injections. This can help make the injections more comfortable.
You must use a clean needle and syringe for both injections.
If you are unsure of the amount of solution to inject, talk to your doctor or pharmacist before injection.
When prescribing small doses/volumes (e.g., in the case of children), the vials will be kept almost full with the product after withdrawal of the required dose. The remaining solution must be discarded after use.
If you use more Myalepta than you should
If you use more Myalepta than you should, talk to your doctor or go to the hospital immediately. Your doctor will monitor you for any side effects.
If you forget to use Myalepta
If you inject less Myalepta than you should, talk to your doctor immediately. Your doctor will monitor you for any side effects.
If you stop using Myalepta
Do not stop your treatment with Myalepta without talking to your doctor. Your doctor will decide whether you should stop treatment with this medicine.
If you need to stop using Myalepta, your doctor will gradually reduce the dose over a period of two weeks before stopping it completely. Your doctor will also ask you to follow a low-fat diet.
Do not stop treatment with Myalepta unless your doctor tells you to.
If you have any further questions on the use of this medicine, ask your doctor.
Like all medicines, this medicine can cause adverse effects, although not all people suffer from them.
Possible adverse effects with this medicine:
Severe Adverse Effects
If you notice any of the following severe adverse effects, inform your doctor immediately (you may need urgent medical treatment). If you cannot contact your doctor, seek urgent medical assistance:
Allergic Reactions
Consult a doctor if you notice any severe allergic reaction, including:
Inflamed Pancreas(“pancreatitis”):
Consult a doctor if you notice signs of pancreas inflammation, including:
Other Adverse Effects
Tell your doctor if you notice any of the following adverse effects.
Very Common (may affect more than one in ten people):
Common(may affect up to one in ten people):
Frequency Not Known(frequency cannot be estimated from available data):
Tell your doctor if you notice any of the above adverse effects.
Signs of Hyperglycemia and Hypoglycemia
Among the symptoms of hypoglycemiaare:
If you notice any of the above symptoms or are unsure, consult your doctor immediately. Your doctor may need to change the treatment.
Among the symptoms of hyperglycemiaare:
Signs of High Fat Levels
Among the symptoms of high fat levelsare:
Tell your doctor if you notice any of the above adverse effects.
Reporting Adverse Effects
If you experience any adverse effect, consult your doctor, pharmacist, or nurse, even if it is a possible adverse effect not listed in this leaflet. You can also report them directly through the national reporting system included in Appendix V. By reporting adverse effects, you can contribute to providing more information on the safety of this medicine.
Keep this medicine out of sight and reach of children.
Do not use this medicine after the expiration date stated on the packaging after CAD and on the vial after EXP. The expiration date is the last day of the month indicated.
Store in a refrigerator (between 2°C and 8°C). Keep the vial in the outer packaging to protect it from light.
After reconstitution, the solution must be administered immediately and cannot be stored for later use. Discard unused medicine.
Do not use this medicine if you notice that the solution is not transparent, has color, or contains particles.
Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to dispose of packaging and medicines that are no longer needed. This will help protect the environment.
Myalepta Composition
Each vial contains 5.8 milligrams of metreleptin. After diluting the vial contents in 1.1 milliliters of water for injectable preparations, each milliliter will contain 5 milligrams of metreleptin.
Appearance of Myalepta and Container Contents
Myalepta is presented as a powder for injectable solution. It is a white powder supplied in a glass vial with a rubber stopper and an aluminum seal with a easy-open plastic blue cap.
Myalepta is available in packs containing 1 or 30 vials.
Only some pack sizes may be marketed in your country.
Your doctor, nurse, or pharmacist will provide you with the appropriate syringes and needles, swabs, and water for injectable preparations to allow you to prepare and inject Myalepta. They will also provide you with a container for disposing of sharp objects so that you can safely dispose of the used vials, syringes, and needles.
Marketing Authorization Holder
Chiesi Farmaceutici S.p.A.
Via Palermo 26/A
43122 Parma
Italy
Manufacturer
Amryt Pharmaceuticals DAC
45 Mespil Road
Dublin 4
Ireland
You can request more information about this medicine by contacting the local representative of the marketing authorization holder:
België/Belgique/Belgien Chiesi sa/nv Tél/Tel: + 32 (0)2 788 42 00 | Lietuva ExCEEd Orphan s.r.o. Bucharova 2657/12, Prague 5, 158 00 Czech Republic Tel.: +370 661 663 99 pv.global@exceedorphan.com |
Luxembourg/Luxemburg Chiesi sa/nv Tél/Tel: + 32 (0)2 788 42 00 | |
Ceská republika ExCEEd Orphan s.r.o. Bucharova 2657/12, Prague 5, 158 00 Czech Republic Tel: +420 724 321 774 pv.global@exceedorphan.com | Magyarország ExCEEd Orphan s.r.o. Bucharova 2657/12, Prague 5, 158 00 Czech Republic Tel.: +36 20 399 4269 pv.global@exceedorphan.com |
Danmark Chiesi Pharma AB Tlf.: + 46 8 753 35 20 | Malta Amryt Pharmaceuticals DAC Tel: +44 1604 549952 medinfo@amrytpharma.com |
Deutschland Chiesi GmbH Tel: + 49 40 89724-0 | Nederland Chiesi Pharmaceuticals B.V. Tel: + 31 88 501 64 00 |
Eesti ExCEEd Orphan s.r.o. Bucharova 2657/12, Prague 5, 158 00 Czech Republic Tel.: +370 661 663 99 pv.global@exceedorphan.com | Norge Chiesi Pharma AB Tlf: + 46 8 753 35 20 |
Ελλ?δα Amryt Pharmaceuticals DAC Tηλ: +800 44 474447 Tηλ: +44 1604 549952 medinfo@amrytpharma.com | Österreich Chiesi Pharmaceuticals GmbH Tel: + 43 1 4073919 |
España Chiesi España, S.A.U. Tel: + 34 93 494 8000 | Polska ExCEEd Orphan s.r.o. Bucharova 2657/12, Prague 5, 158 00 Czech Republic Tel.: +48 502 188 023 pv.global@exceedorphan.com |
France Chiesi S.A.S. Tél: + 33 1 47688899 | Portugal Chiesi Farmaceutici S.p.A. Tel: + 39 0521 2791 |
Hrvatska ExCEEd Orphan Distribution d.o.o. Savska cesta 32, Zagreb, 100 00 Croatia Tel: +385 99 320 0330 pv.global@exceedorphan.com | România ExCEEd Orphan s.r.o. Bucharova 2657/12, Prague 5, 158 00 Czech Republic Tel: +40 744 366 015 pv.global@exceedorphan.com |
Ireland Chiesi Farmaceutici S.p.A. Tel: + 39 0521 2791 | Slovenija ExCEEd Orphan s.r.o. Bucharova 2657/12, Prague 5, 158 00 Czech Republic Tel: +386 30 210 050 pv.global@exceedorphan.com |
Ísland Chiesi Pharma AB Sími: +46 8 753 35 20 | Slovenská republika ExCEEd Orphan s.r.o. Bucharova 2657/12, Prague 5, 158 00 Czech Republic Tel: +420 608 076 274 pv.global@exceedorphan.com |
Italia Chiesi Italia S.p.A. Tel: + 39 0521 2791 | Suomi/Finland Chiesi Pharma AB Puh/Tel: +46 8 753 35 20 |
Κ?προς Amryt Pharmaceuticals DAC Tηλ: +800 44 474447 Tηλ: +44 1604 549952 medinfo@amrytpharma.com | Sverige Chiesi Pharma AB Tel: +46 8 753 35 20 |
Latvija ExCEEd Orphan s.r.o. Bucharova 2657/12, Prague 5, 158 00 Czech Republic Tel.: +370 661 663 99 pv.global@exceedorphan.com |
Date of Last Revision of this Leaflet: June 2025
This medicinal product has been authorized under “exceptional circumstances”. This means that due to the rarity of this disease, it has not been possible to obtain complete information on this medicinal product.
The European Medicines Agency will review any new information on this medicinal product that may become available every year and this leaflet will be updated as necessary.
Other Sources of Information
Detailed information on this medicinal product is available on the European Medicines Agency website: https://www.ema.europa.eu, and on the website of the Spanish Agency for Medicines and Health Products (AEMPS) (https://www.aemps.gob.es/).
There are also links to other websites about rare diseases and orphan medicines.
Instructions for Use
Before using Myalepta, you must first read sections 1-6 of this leaflet and then the Instructions for Use.
Before starting self-administration of this medicine at home, your doctor, nurse, or pharmacist will show you how to prepare and inject Myalepta. Contact them if you have any questions or need more information or help. Take the time to prepare and inject your medicine carefully; this includes the time it takes for the vial to reach room temperature after removing it from the refrigerator, which can take approximately 20 minutes.
Additional Training Information
You can find videos and additional training information that will help you understand how to use Myalepta correctly. Your doctor will show you how to access this information.
Syringe Reading
Align the top edge of the plunger with the line corresponding to the prescribed dose. Then, you can find an example of the different syringe sizes. If the syringe is not the same or has different dose marks, consult your doctor, nurse, or pharmacist for more information.
Using the 0.3 ml Syringe
Converting Dose from “ml” to “units” with the 0.3 ml Syringe
Child's Weight | Myalepta Dose | Amount of Myalepta Solution Mixed | Amount of Myalepta Solution to be Injected in “units” with the 0.3 ml Syringe |
9 kg | 0.54 mg | 0.10 ml | 10 |
10 kg | 0.60 mg | 0.12 ml | 12 |
11 kg | 0.66 mg | 0.13 ml | 13 |
12 kg | 0.72 mg | 0.14 ml | 14 |
13 kg | 0.78 mg | 0.15 ml | 15 |
14 kg | 0.84 mg | 0.16 ml | 16 |
15 kg | 0.90 mg | 0.18 ml | 18 |
16 kg | 0.96 mg | 0.19 ml | 19 |
17 kg | 1.02 mg | 0.20 ml | 20 |
18 kg | 1.08 mg | 0.21 ml | 21 |
19 kg | 1.14 mg | 0.22 ml | 22 |
20 kg | 1.20 mg | 0.24 ml | 24 |
21 kg | 1.26 mg | 0.25 ml | 25 |
22 kg | 1.32 mg | 0.26 ml | 26 |
23 kg | 1.38 mg | 0.27 ml | 27 |
24 kg | 1.44 mg | 0.28 ml | 28 |
25 kg | 1.50 mg | 0.30 ml | 30 |
Using the 1 ml Syringe
Using the 3.0 ml Syringe
Step A: Preparation
Place the following items on a white, well-lit work surface:
You will also need two syringes:
Your doctor, nurse, or pharmacist will choose the size of this syringe that you will use for the Myalepta dose.
Step B: Filling the 3 ml Syringe with 1.1 ml of Water for Injectable Preparations
Your doctor, nurse, or pharmacist will provide you with “water for injectable preparations” with the syringes and the medicine vial. This must be mixed with the Myalepta powder to dissolve it and obtain the liquid medicine that you must inject. The water for injectable preparations will be provided in:
Always use a new ampoule, water for injectable preparations, or vial. Never use leftover water for injectable preparations from a previous Myalepta solution preparation.
Plastic Ampoule of Water for Injectable Preparations
The plastic ampoule is a container with a snap-off top.
To draw up the water for injectable preparations, snap off the top of the ampoule.
Keep the syringe inside the ampoule and turn it upside down. The syringe should now be facing up.
Keep the syringe inside the ampoule and carefully pull back the plunger.
Attach the needle to the syringe.
Glass Ampoule of Water for Injectable Preparations
The glass ampoule is a sealed container.
Before opening the glass ampoule of water for injectable preparations, prepare the 3 ml syringe by attaching the needle. Do not overtighten the needle.
To draw up the water for injectable preparations, open the ampoule by breaking it at the break point, as shown in the image.
Maintain the needle inside the ampoule and carefully pull the plunger.
Glass vial of water for injectable preparations
The glass vial will have a plastic cap that you should remove, and underneath, you will find a rubber seal.
Connect the needle to the 3 ml syringe. Do not tighten the needle too much.
Place the vial on a rigid and flat surface.
Push the plunger fully.
Maintain the needle inside the vial and turn it around. The needle should now be facing upwards.
Carefully pull the plunger.
With the glass vial or plastic ampoule
With the glass ampoule
Step C: Myalepta dilution
When well mixed, the Myalepta solution should be transparent and not contain any dry powder residue, bubbles, or foam. Do not use the solution if it is not transparent or contains particles. Discard it and start again from step 1.
Step D: filling the syringe with injectable Myalepta
Step E: selection and preparation of the injection site
If you want to perform all injections in the same area of the body, do not use the same point where you performed the previous injection.
Step F: Myalepta injection
Important:Myalepta should be injected under the skin (“subcutaneously”). Do notinject into a muscle.
Step G: disposal of used materials
Important