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Home » FDA approves Bayer’s Xofigo for advanced prostate cancer

FDA approves Bayer’s Xofigo for advanced prostate cancer

May 23, 2013
CenterWatch Staff

The FDA has approved Bayer Pharmaceuticals’ Xofigo (radium Ra 223 dichloride) to treat males with symptomatic late-stage metastatic castration-resistant prostate cancer that has spread to bones but not to other organs. It is intended for men whose cancer has spread after receiving medical or surgical therapy to lower testosterone.

“Xofigo binds with minerals in the bone to deliver radiation directly to bone tumors, limiting the damage to the surrounding normal tissues,” said Richard Pazdur, M.D., director of the office of hematology and oncology products in the FDA’s Center for Drug Evaluation and Research. “Xofigo is the second prostate cancer drug approved by the FDA in the past year that demonstrates an ability to extend the survival of men with metastatic prostate cancer.”

 Xofigo is being approved more than three months ahead of the product’s prescription drug user fee goal date of Aug. 14, 2013, the date the agency was scheduled to complete review of the drug application. The FDA reviewed Xofigo under the agency’s priority review program, which provides for an expedited review of drugs that appear to provide safe and effective therapy when no satisfactory alternative therapy exists, or offer significant improvement compared to marketed products.

 Xofigo’s safety and effectiveness were evaluated in a single clinical trial of 809 men with symptomatic castration-resistant prostate cancer that spread to bones but not to other organs. Patients were randomly assigned to receive Xofigo or a placebo plus best standard of care. The study was designed to measure overall survival. Results from a pre-planned interim analysis showed men receiving Xofigo lived a median of 14 months compared to a median of 11.2 months for men receiving placebo. An exploratory updated analysis conducted later in the trial confirmed Xofigo’s ability to extend overall survival.

 The most common side effects reported during clinical trials were nausea, diarrhea, vomiting and swelling of the leg, ankle or foot. The most common abnormalities detected during blood testing included low levels of red blood cells, lymphocytes, white blood cells, platelets and infection-fighting white blood cells.

In August 2012, the FDA approved Xtandi to treat men with metastatic castration-resistant prostate cancer that has spread or recurred, even with medical or surgical therapy to minimize testosterone. Xtandi is approved for patients who have previously been treated the chemotherapy drug docetaxel.

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