MedImmune Replies to FDA Complete Response Letter on Motavizumab

Thursday, 24 December 2009

AstraZeneca today announced that MedImmune, its biologics unit, has filed its formal regulatory reply to a Complete Response Letter (CRL) from the US Food and Drug Administration (FDA). MedImmune received the CRL asking for additional information regarding motavizumab on 25 November 2008, and the company has been in ongoing discussions with FDA reviewers since then to complete and file its CRL reply.

The CRL is in connection with the Biologics License Application (BLA) for motavizumab for the prevention of serious respiratory syncytial virus (RSV) disease in high-risk infants, which was submitted on 30 January 2008. Motavizumab is an investigational monoclonal antibody (MAb) with enhanced activity against RSV compared to Synagis (palivizumab).

MedImmune was not required to conduct additional clinical trials in responding to the CRL. MedImmune will continue discussions with the FDA reviewers as needed throughout the remainder of the registration process.


About AstraZeneca
AstraZeneca is a major international healthcare business engaged in the research, development, manufacturing and marketing of meaningful prescription medicines and supplier for healthcare services. AstraZeneca is one of the world's leading pharmaceutical companies with healthcare sales of US$ 31.6 billion and is a leader in gastrointestinal, cardiovascular, neuroscience, respiratory, oncology and infectious disease medicines. For more information about AstraZeneca, please visit:

About MedImmune
MedImmune, the worldwide biologics business for AstraZeneca PLC (LSE: AZN.L, NYSE: AZN), has approximately 3,300 employees worldwide and is headquartered in Gaithersburg, Maryland. For more information, visit MedImmune’s website at


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