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What is Beyfortus used for?

Nirsevimab is used by infants and certain young children to prevent serious lung infections (such as pneumonia) that are caused the respiratory syncytial virus (RSV). Nirsevimab belongs to a class of drugs known as monoclonal antibodies. It works by preventing the growth of the virus.




Respiratory Syncytial Virus
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Beyfortus prices starting at $580.38.

Beyfortus Frequently Asked Questions

Read the Patient Information Leaflet if available from the health care professional before your child receives nirsevimab. If you have any questions, ask the doctor or pharmacist.

This medication is given by injection into a muscle by a health care professional. It is usually given in the upper thigh. It is given as directed by your child's doctor, usually as a single dose before or during the child's first RSV season. RSV season in the northern hemisphere usually starts in October and runs through April. The dosage is based on your child's weight.

Some children may need another dose of nirsevimab to get the best protection. Closely follow the treatment schedule provided by the doctor.

IMPORTANT: HOW TO USE THIS INFORMATION: This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.

Beyfortus Dosage and Form Information

100 Mg/Ml