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BEYFORTUS 100 mg injectable solution in pre-filled syringe

BEYFORTUS 100 mg injectable solution in pre-filled syringe

Ask a doctor about a prescription for BEYFORTUS 100 mg injectable solution in pre-filled syringe

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Doctor

Dmytro Horobets

Family medicine6 years of experience

Dr. Dmytro Horobets is a licensed family medicine physician in Poland, specialising in endocrinology, diabetology, obesity management, gastroenterology, pediatrics, general surgery, and pain medicine. He offers online consultations for adults and children, providing personalised medical support for a wide range of acute and chronic health concerns.

Areas of expertise:

  • Endocrinology: diabetes type 1 and type 2, prediabetes, thyroid disorders, metabolic syndrome, hormonal imbalance.
  • Obesity medicine: structured weight management plans, nutritional counselling, obesity-related health risks.
  • Gastroenterology: acid reflux (GERD), gastritis, irritable bowel syndrome (IBS), liver and biliary conditions.
  • Pediatric care: infections, respiratory symptoms, digestive issues, growth and development monitoring.
  • General surgery support: pre- and post-surgical consultations, wound care, rehabilitation.
  • Pain management: chronic and acute pain, back pain, joint pain, post-traumatic pain syndromes.
  • Cardiovascular health: hypertension, cholesterol control, risk assessment for heart disease.
  • Preventive medicine: regular check-ups, health screenings, long-term management of chronic conditions.

Dr. Horobets combines evidence-based medicine with a patient-centred approach. He carefully evaluates each patient’s medical history and symptoms, offering clear explanations and structured treatment plans adapted to individual needs.

Whether you need help managing diabetes, tackling weight-related health issues, interpreting lab results, or receiving general family medicine support, Dr. Horobets provides professional online care tailored to your specific health goals.

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This page is for general information. Consult a doctor for personal advice. Call emergency services if symptoms are severe.
About the medicine

How to use BEYFORTUS 100 mg injectable solution in pre-filled syringe

Introduction

Package Leaflet: Information for the User

Beyfortus 50mg solution for injection in pre-filled syringe

Beyfortus 100mg solution for injection in pre-filled syringe

nirsevimab

This medicine is subject to additional monitoring, which will allow for the quick identification of new safety information. You can help by reporting any side effects your child may experience. The last part of section 4 will tell you how to report side effects.

Read all of this leaflet carefully before giving this medicine to your child, because it contains important information for you and your child.

  • Keep this leaflet, you may need to read it again.
  • If you have any further questions, ask your doctor, pharmacist, or nurse.
  • If your child experiences any side effects, talk to your doctor, pharmacist, or nurse, even if they are not listed in this leaflet. See section 4.

Contents of the pack

  1. What is Beyfortus and what is it used for
  2. What you need to know before Beyfortus is given to your child
  3. How and when to give Beyfortus
  4. Possible side effects
  5. Storage of Beyfortus
  6. Contents of the pack and further information

1. What is Beyfortus and what is it used for

What is Beyfortus

Beyfortus is a medicine given as an injection to protect babies and children under 2 years of age against the respiratory syncytial virus(RSV). RSV is a common respiratory virus that usually causes mild symptoms similar to those of the common cold. However, especially in babies, vulnerable children, and older adults, RSV can cause serious diseases, such as bronchiolitis (inflammation of the small airways in the lung) and pneumonia (infection of the lungs) that can lead to hospitalization or even death. The virus is usually more common during the winter.

Beyfortus contains the active substance nirsevimab, which is an antibody (a protein designed to bind to a specific target) that binds to the protein that RSV needs to infect the body. By binding to this protein, Beyfortus blocks its action, thereby preventing the virus from entering and infecting human cells.

What Beyfortus is used for

Beyfortus is a medicine used to protect your child against disease caused by RSV.

2. What you need to know before Beyfortus is given to your child

Your child should not use Beyfortus if they are allergic to nirsevimab or to any of the other ingredients of this medicine (listed in section 6).

Tell your child's doctor, pharmacist, or nurse if this applies to your child. If you are not sure, consult your child's doctor, pharmacist, or nurse before giving the medicine.

If your child shows signs of a severe allergic reaction,contact a doctor immediately.

Warnings and precautions

Consult your doctor or seek medical help immediately if you notice any signs of allergic reaction, such as:

  • difficulty breathing or swallowing
  • swelling of the face, lips, tongue, or throat
  • severe itching of the skin, with a red rash or raised bumps

Consult your healthcare professional before giving Beyfortus to your child if they have a low number of platelets in the blood (which help blood to clot), a bleeding disorder, or bruise easily, or if they are taking an anticoagulant (a medicine to prevent blood clots).

In certain chronic diseases, where too much protein is lost through the urine or intestine, for example, nephrotic syndrome and chronic liver diseases, the level of protection of Beyfortus may be reduced.

Beyfortus contains 0.1 mg of polysorbate 80 in each 50 mg dose (0.5 ml) and 0.2 mg in each 100 mg dose (1 ml). Polysorbates can cause allergic reactions. Tell your doctor if your child has any known allergy.

Children and adolescents

Do not give this medicine to children between 2 and 18 years of age because it has not been studied in this age group.

Other medicines and Beyfortus

No interactions have been observed between Beyfortus and other medicines. However, tell your doctor, pharmacist, or nurse if your child is taking, has recently taken, or might take any other medicine.

Beyfortus can be given at the same time as vaccines that are part of the national vaccination program.

3. How and when to give Beyfortus

Beyfortus should be given by a healthcare professional as an injection into the muscle. It is usually given in the outer part of the thigh.

The recommended dose is:

  • 50 mg for children who weigh less than 5 kg and 100 mg for children who weigh 5 kg or more in their first RSV season.
  • 200 mg for children who remain vulnerable to serious RSV disease in their second RSV season (given as 2 injections of 100 mg at separate sites).

Beyfortus should be given before the RSV season. The virus is usually more common during the winter (known as the RSV season). If your child is born during the winter, Beyfortus should be given after birth.

If your child is going to have heart surgery (cardiac surgery), they may be given an additional dose of Beyfortus after the surgery to ensure they have adequate protection for the rest of the RSV season.

If you have any other questions about 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.

Side effects may include:

Uncommon(may affect up to 1 in 100 children)

  • rash
  • reaction at the injection site (i.e., redness, swelling, and pain where the injection is given)
  • fever

Frequency not known(cannot be estimated from the available data)

  • allergic reactions

Reporting of side effects

If your child experiences any side effects, talk to your doctor, pharmacist, or nurse, even if they are not listed in this leaflet. You can also report side effects directly through the national reporting system listed in Appendix V. By reporting side effects, you can help provide more information on the safety of this medicine.

5. Storage of Beyfortus

Your doctor, pharmacist, or nurse is responsible for storing this medicine and disposing of any unused product correctly. The following information is for healthcare professionals only.

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 after EXP. The expiry date is the last day of the month shown.

Store in a refrigerator (between 2°C and 8°C). After removal from the refrigerator, Beyfortus should be protected from light and used within 8 hours or discarded.

Store the pre-filled syringe in the outer carton to protect it from light.

Do not freeze, shake, or expose to direct heat.

Disposal of unused medicine and all materials that have come into contact with it should be done according to local regulations.

6. Contents of the pack and further information

What Beyfortus contains

  • The active substance is nirsevimab.
  • One pre-filled syringe of 0.5 ml solution contains 50 mg of nirsevimab.
  • One pre-filled syringe of 1 ml solution contains 100 mg of nirsevimab.
  • The other ingredients are: L-histidine, L-histidine hydrochloride, L-arginine hydrochloride, sucrose, polysorbate 80 (E433), and water for injections.

Appearance and pack size of Beyfortus

Beyfortus is a colourless to yellowish solution for injection.

Beyfortus is available in:

  • 1 or 5 pre-filled syringe(s) without needles.
  • 1 pre-filled syringe packed with 2 separate needles of different sizes.

Not all pack sizes may be marketed.

Marketing authorisation holder

Sanofi Winthrop Industrie

82 avenue Raspail

94250 Gentilly

France

Manufacturer

AstraZeneca AB

Gärtunavägen

SE‑152 57 Södertälje

Sweden

You can request more information about this medicine from the local representative of the marketing authorisation holder:

België/Belgique/Belgien

Sanofi Belgium

Tél/Tel: +32 2 710.54.00

Lietuva

Swixx Biopharma UAB

Tel: +370 5 236 91 40

Text with the name of the company Swixx Biopharma EODD and its phone number +359 2 4942 480 in a foreign language

Luxembourg/Luxemburg

Sanofi Belgium

Tél/Tel: +32 2 710.54.00

Ceská republika

Sanofi s.r.o.

Tel: +420 233 086 111

Magyarország

sanofi-aventis zrt

Tel.: +36 1 505 0055

Danmark

Sanofi A/S

Tlf: +45 4516 7000

Malta

Sanofi S.r.l.

Tel: +39 02 39394275

Deutschland

Sanofi-Aventis Deutschland GmbH

Tel.: 0800 54 54 010

Tel. from abroad: +49 69 305 21 130

Nederland

Sanofi B.V.

Tel: +31 20 245 4000

Eesti

Swixx Biopharma OÜ

Tel: +372 640 10 30

Norge

Sanofi-aventis Norge AS

Tlf: + 47 67 10 71 00

Ελλάδα

ΒΙΑΝΕΞ Α.Ε.

Τηλ: +30.210.8009111

Österreich

Sanofi-Aventis GmbH

Tel: +43 1 80 185-0

España

sanofi-aventis, S.A.

Tel: +34 93 485 94 00

Polska

Sanofi Sp. z o. o.

Tel.: +48 22 280 00 00

France

Sanofi Pasteur Europe

Tél: 0800 222 555

Appel depuis l’étranger : +33 1 57 63 67 62

Portugal

Sanofi – Produtos Farmacêuticos, Lda.

Tel: + 351 21 35 89 400

Hrvatska

Swixx Biopharma d.o.o.

Tel: +385 1 2078 500

România

Sanofi Romania SRL

Tel: +40(21) 317 31 36

Ireland

sanofi-aventis Ireland T/A SANOFI

Tel: + 353 (0) 1 4035 600

Slovenija

Swixx Biopharma d.o.o

Tel: +386 1 235 51 00

Ísland

Vistor

Sími: +354 535 7000

Slovenská republika

Swixx Biopharma s.r.o.

Tel: +421 2 208 33 600

Italia

Sanofi S.r.l.

Tel: 800536389

Suomi/Finland

Sanofi Oy

Puh/Tel: +358 (0) 201 200 300

Κύπρος

C.A. Papaellinas Ltd.

Τηλ: +357 22 741741

Sverige

Sanofi AB

Tel: +46 8-634 50 00

Latvija

Swixx Biopharma SIA

Tel: +371 6 616 47 50

United Kingdom (Northern Ireland)

sanofi-aventis Ireland Ltd. T/A SANOFI

Tel: +44 (0) 800 035 2525

Date of last revision of this leaflet:

Detailed information on this medicine is available on the European Medicines Agency website: http://www.ema.europa.eu.

------------------------------------------------------------------------------------------------------------------------

This information is intended only for healthcare professionals:

In order to improve the traceability of biological medicinal products, the name and batch number of the administered product should be clearly recorded.

Inspect Beyfortus visually for particles and discoloration before administration. Beyfortus is a transparent to opalescent, colourless to yellowish solution. Do not inject Beyfortus if the liquid is cloudy, discoloured, or contains large or foreign particles.

Do not use it if the Beyfortus pre-filled syringe has been dropped or damaged or if the security seal of the packaging is broken.

Administer the entire contents of the pre-filled syringe as an intramuscular injection, preferably in the anterolateral aspect of the thigh. The gluteal muscle should not be used routinely as an injection site due to the risk of damage to the sciatic nerve.

Online doctors for BEYFORTUS 100 mg injectable solution in pre-filled syringe

Discuss dosage, side effects, interactions, contraindications, and prescription renewal for BEYFORTUS 100 mg injectable solution in pre-filled syringe – subject to medical assessment and local rules.

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Antonio Cayatte

General medicine43 years of experience

Dr Antonio Cayatte is a physician in General and Acute Medicine with over 30 years of experience across clinical care, medical research, and education. He offers online consultations for adults with a wide range of symptoms, both acute and chronic.

His clinical background includes:

  • assessment of sudden or unclear symptoms
  • ongoing care for chronic conditions
  • follow-up after hospital discharge
  • interpretation of test results
  • medical support while abroad
Dr Cayatte earned his degree from the University of Lisbon and taught internal medicine at Boston University School of Medicine. He holds active medical registrations in both Portugal and the UK and is a Fellow of the American Heart Association.

Consultations are available in English and Portuguese. Patients value his clarity, professionalism, and balanced approach to evidence-based care.

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Dmytro Horobets

Family medicine6 years of experience

Dr. Dmytro Horobets is a licensed family medicine physician in Poland, specialising in endocrinology, diabetology, obesity management, gastroenterology, pediatrics, general surgery, and pain medicine. He offers online consultations for adults and children, providing personalised medical support for a wide range of acute and chronic health concerns.

Areas of expertise:

  • Endocrinology: diabetes type 1 and type 2, prediabetes, thyroid disorders, metabolic syndrome, hormonal imbalance.
  • Obesity medicine: structured weight management plans, nutritional counselling, obesity-related health risks.
  • Gastroenterology: acid reflux (GERD), gastritis, irritable bowel syndrome (IBS), liver and biliary conditions.
  • Pediatric care: infections, respiratory symptoms, digestive issues, growth and development monitoring.
  • General surgery support: pre- and post-surgical consultations, wound care, rehabilitation.
  • Pain management: chronic and acute pain, back pain, joint pain, post-traumatic pain syndromes.
  • Cardiovascular health: hypertension, cholesterol control, risk assessment for heart disease.
  • Preventive medicine: regular check-ups, health screenings, long-term management of chronic conditions.

Dr. Horobets combines evidence-based medicine with a patient-centred approach. He carefully evaluates each patient’s medical history and symptoms, offering clear explanations and structured treatment plans adapted to individual needs.

Whether you need help managing diabetes, tackling weight-related health issues, interpreting lab results, or receiving general family medicine support, Dr. Horobets provides professional online care tailored to your specific health goals.

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Karim BenHarbi

General medicine8 years of experience

Dr. Karim Ben Harbi is a licensed general practitioner based in Italy. He provides online consultations for adults and children, combining international clinical experience with evidence-based medicine. His care approach is focused on accurate diagnosis, preventive care, and personalised health guidance.

Dr. Ben Harbi received his medical degree from Sapienza University in Rome. His training included hands-on experience in diverse settings — tropical medicine, rural healthcare, and urban outpatient practice. He also conducted clinical research in microbiology, exploring the role of the gut microbiome in chronic gastrointestinal issues.

You can consult Dr. Ben Harbi for:

  • General health concerns, prevention, and primary care.
  • Hypertension, type 1 and type 2 diabetes, metabolic issues.
  • Cold, cough, flu, respiratory infections, sore throat, fever.
  • Chronic digestive issues: bloating, gastritis, IBS, microbiome imbalance.
  • Skin rashes, mild allergic reactions, basic dermatological complaints.
  • Medication guidance, treatment adjustments, prescription review.
  • Paediatric concerns — fever, infections, general well-being.
  • Lifestyle optimisation: stress, sleep, weight, and diet counselling.

Dr. Ben Harbi offers reliable, accessible medical support through online consultations, helping patients make informed decisions about their health with a clear, structured, and compassionate approach.

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Family medicine10 years of experience

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She treats adults with respiratory illnesses such as pneumonia, COPD and bronchial asthma, as well as cardiovascular conditions including hypertension and ischaemic heart disease. Her practice also covers gastrointestinal complaints and chronic comorbidities that require careful, structured medical supervision.

Dr Boichuk provides care for children from birth, including acute respiratory viral infections, infectious diseases, pneumonia, bronchitis, bronchial obstruction syndromes and allergic reactions. She offers clear, evidence-based guidance to parents and ensures safe follow-up throughout the child’s recovery.

Her work also includes developing personalised immunisation plans and supporting families with long-term preventive care.

Known for her structured clinical approach and clear communication, Dr Liudmyla Boichuk offers patients of all ages comprehensive, reliable and evidence-based medical care.

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In her practice, Dr Reguero Capilla helps patients understand the causes of their symptoms, review test results, and choose appropriate treatment or monitoring strategies. Her consultations are suitable both for first-time assessments and for follow-up care over time.

Patients commonly consult Dr Marta Reguero Capilla for:

  • allergic rhinitis, seasonal allergies, and perennial allergy symptoms;
  • allergic conditions in adults and children;
  • bronchial asthma and allergy-related respiratory symptoms;
  • urticaria (acute and chronic) and angioedema;
  • food allergies and reactions to foods, additives, or medications;
  • atopic dermatitis, allergic rashes, and persistent itching;
  • unexplained or recurrent allergic reactions;
  • interpretation of laboratory tests, allergy testing, and immunology results;
  • immune system concerns, frequent infections, and reduced immune response;
  • ongoing medical follow-up and treatment adjustment.
Dr Reguero Capilla works in a structured and attentive manner, explaining medical decisions clearly and helping patients make informed choices about their own health or their child’s care.

When clinically appropriate, she may provide recommendations for further tests or referrals that patients can use within Spanish medical networks, including Sanitas and DKV, in accordance with the terms and conditions of those services.

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Dr. Svetlana Kolomeeva is a general practitioner and internal medicine doctor providing online consultations for adults. She helps patients manage acute symptoms, chronic conditions, and preventive care. Her clinical focus includes cardiovascular health, hypertension control, and managing symptoms like fatigue, weakness, sleep issues, and overall low energy.

Patients commonly seek her help for:

  • High blood pressure, headaches, dizziness, swelling, palpitations.
  • Diagnosis and management of hypertension, arrhythmias, and tachycardia.
  • Metabolic syndrome, excess weight, high cholesterol.
  • Chronic fatigue, insomnia, poor concentration, anxiety.
  • Respiratory symptoms: colds, flu, sore throat, cough, fever.
  • Digestive issues: heartburn, bloating, constipation, IBS symptoms.
  • Chronic conditions: diabetes, thyroid disorders.
  • Interpretation of lab tests and medical reports, therapy adjustment.
  • Second opinion and decision-making support.
  • Cardiovascular disease prevention and metabolic risk reduction.
  • Long-term follow-up and dynamic health monitoring.

Dr Kolomeeva combines clinical expertise with personalised care. She clearly explains diagnoses, guides patients through symptoms and treatment options, and provides actionable plans. Her consultations are designed not only to address current complaints but also to stabilise chronic conditions and prevent future complications. She supports patients through every stage of care – from first symptoms to ongoing health management.

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Areas of expertise:

  • Hair loss in women and men, postpartum hair loss, androgenetic and telogen effluvium.
  • Scalp conditions: seborrheic dermatitis, psoriasis, scalp irritation, dandruff.
  • Chronic conditions: hypertension, diabetes, metabolic disorders.
  • Online trichology consultation: customised treatment plans, nutritional support, hair growth stimulation.
  • Hair loss prevention: hormonal imbalance, stress factors, haircare strategies.
  • Routine health check-ups, prevention of cardiovascular and metabolic diseases.
  • Personalised nutritional advice to improve hair strength, skin health, and hormonal balance.
  • Aesthetic medicine: non-invasive strategies to enhance skin quality, tone, and metabolic wellness.

Dr Alexandrova follows an evidence-based and holistic approach: online consultations with a therapist and trichologist on Oladoctor provide professional support for hair, scalp, and overall health — all from the comfort of your home.

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