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Breast Cancer Health Center

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FDA Mulls Fate of Avastin as Breast Cancer Drug

Patients and Doctors Testify About Safety and Effectiveness of Avastin for Advanced Breast Cancer
WebMD Health News
Reviewed by Laura J. Martin, MD

June 28, 2011 -- An unusual and closely watched hearing on the fate of Avastin as a treatment for advanced breast cancer got off to an emotional start on Tuesday, with federal advisors listening to testimony from patients, doctors, and advocacy groups.

Many urged the FDA to reconsider its decision to withdraw approval for Avastin as a treatment for advanced breast cancer.

"I owe my life to Avastin," said Patricia Howard, age 66, of New York, who has been treated for breast cancer since 2005. "I'm not just a piece of anecdotal evidence. I'm a wife, mother, sister, aunt, friend, and grammy."

But others applauded the agency's decision.

Christine Brunswick, vice president of the National Breast Cancer Coalition, said she has also been diagnosed with metastatic breast cancer. "I can personally attest to how devastating this disease is."

She said scientific studies have not proven that the drug is safe or effective as a breast cancer treatment.

"We must accept and act on evidence or we will never make the needed progress we so desperately want," she says. "We now know that women died because of this drug."

Controversy Over Avastin

Avastin is a drug that shrinks tumors by choking off their blood supply.

It was first approved in 2004 to treat metastatic colorectal cancer. Since then, it has also been approved to treat advanced non-small-cell lung cancer, metastatic renal cell carcinoma, and glioblastoma brain tumors.

In 2008, against the recommendation of its advisors, the FDA approved Avastin for breast cancer through an accelerated approval process that allows a therapy to be marketed to the public based on preliminary clinical findings, pending further studies to confirm its safety and effectiveness.

That approval was based on the results of a single clinical trial which found that Avastin prevented breast cancer from progressing for an average of 5.5 months longer in women who took Avastin combined with the chemotherapy drug paclitaxel, compared to women taking paclitaxel and a placebo.

No other studies have been able to repeat that result, however.

Four subsequent studies considered by the FDA have found that Avastin improves progression-free survival by about two months compared to standard chemotherapy, but it doesn't improve overall survival. In some tests of the drug, more women taking Avastin died compared to those on standard chemotherapy.

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