Beyfortus^® (nirsevimab-alip) 50 mg and 100 mg Injection Frequently Asked Questions

Beyfortus is not a vaccine or maternal immunization. Beyfortus is an RSV F protein-directed fusion inhibitor monoclonal antibody indicated for the prevention of RSV lower respiratory tract disease—directly administered to infant as well as eligible children via IM injection. This does not require an immune response from the infants.¹

F protein, fusion protein; IM, intramuscular; RSV, respiratory syncytial virus.

Beyfortus was approved by the US FDA on July 17, 2023.^1,2

View press release

Yes. The Advisory Committee on Immunization Practices (ACIP) voted unanimously, 11 to 0, to include Beyfortus in the VFC program.³

View press release

Based on clinical data, Beyfortus provides RSV protection that extends through 5 months, the typical length of an RSV season.¹

RSV, respiratory syncytial virus.

For children up to 24 months of age, regardless of body weight, who remain at increased risk for severe RSV, the recommended dosage of Beyfortus is a single 200 mg dose administered as 2 IM injections (2 x 100 mg).¹

IM, intramuscular; RSV, respiratory syncytial virus.

Beyfortus can be administered concomitantly with childhood vaccines.¹ 

There is limited experience of Beyfortus coadministration with vaccines.¹ 

In clinical trials, when Beyfortus was given with routine childhood vaccines, the safety and reactogenicity profile of the coadministered regimen was similar to the childhood vaccines given alone.¹ 

Beyfortus should not be mixed with any vaccine in the same syringe or vial. When administered concomitantly with injectable vaccines, they should be given with separate syringes and at different injection sites.¹

Both 1-pack and 5-pack cartons are available.¹

Learn more about ordering Beyfortus

Yes. Beyfortus injection is a sterile, latex-free, preservative-free, clear to opalescent, colorless to yellow solution for intramuscular injection.¹

Beyfortus is contraindicated in infants and children with a history of serious hypersensitivity reactions, including anaphylaxis, to nirsevimab-alip or to any of the excipients.¹

Contraindication
Beyfortus is contraindicated in infants and children with a history of serious hypersensitivity reactions, including anaphylaxis, to nirsevimab-alip or to any of the excipients.¹

Warnings and Precautions
Hypersensitivity Reactions Including Anaphylaxis:
Serious hypersensitivity reactions have been reported following Beyfortus administration. These reactions included urticaria, dyspnea, cyanosis, and/or hypotonia. Anaphylaxis has been observed with human immunoglobulin G1 (IgG1) monoclonal antibodies. If signs and symptoms of anaphylaxis or other clinically significant hypersensitivity reactions occur, initiate appropriate treatment.¹

Use in Individuals With Clinically Significant Bleeding Disorders
As with any other IM intramuscular injections, Beyfortus should be given with caution to infants and children with thrombocytopenia, any coagulation disorder or to individuals on anticoagulation therapy.¹

Serious allergic reactions have occurred with Beyfortus. The most common adverse reactions are rash (0.9%) and injection site reactions (0.3%). You may report side effects to the FDA at 1-800-FDA-1088.¹ 

Review Adverse Reactions

• Active ingredient: nirsevimab-alip¹
• Inactive ingredients: arginine hydrochloride monohydrate, histidine, L-histidine hydrochloride monohydrate, polysorbate 80, sucrose and water for injection¹

For more information and future updates, sign up for Beyfortus emails or request to speak with a representative. For further support, call 1-855-BEYFORTUS (1-855-239-3678).

Get Beyfortus updates

Please refer parents to the Centers for Disease Control and Prevention (CDC) for information on RSV and to Beyfortus.com for more information on Beyfortus.

RSV, respiratory syncytial virus.