dimanche 20 novembre 2011

FDA Commissioner announces Avastin decision

Drug not shown to be safe and effective in breast cancer patients

FDA Commissioner Margaret A. Hamburg, M.D., said Friday she is revoking the agency’s approval of the breast cancer indication for Avastin (bevacizumab) after concluding that the drug has not been shown to be safe and effective for that use.

Avastin will still remain on the market as an approved treatment for certain types of colon, lung, kidney and brain cancer (glioblastoma multiforme).

Avastin’s risks include severe high blood pressure; bleeding and haemorrhaging; heart attack or heart failure; and the development of perforations in different parts of the body such as the nose, stomach, and intestines.

The decision involves Avastin used in combination with the cancer drug paclitaxel for those patients who have not been treated with chemotherapy for their form of metastatic breast cancer known as HER2 negative. This indication must now be removed from Avastin’s product labelling.

Avastin was approved for metastatic breast cancer in February 2008 under the FDA’s accelerated approval program, which allows a drug to be approved based on data that are not sufficiently complete to permit full approval. The accelerated approval was based on promising results from one study that suggested that the drug could provide a meaningful increase in the amount of time from when treatment is started until the tumour grows or the death of the patient.

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