FDA approves Pomalyst for advanced multiple myeloma

The U.S. Food and Drug AdministrationThe U.S. Food and Drug Administration has approved Pomalyst (pomalidomide) to treat patients with multiple myeloma whose disease progressed after being treated with other cancer drugs. Multiple myeloma is a form of blood cancer that primarily affects older adults and arises from plasma cells in the bone marrow. According to the National Cancer Institute, approximately 21,700 Americans are diagnosed with multiple myeloma and 10,710 die yearly from the disease.

Pomalyst is a pill that modulates the body’s immune system to destroy cancerous cells and inhibit their growth. It is intended for patients who have received at least two prior therapies, including lenalidomide and bortezomib, and whose disease did not respond to treatment and progressed within 60 days of the last treatment (relapsed and refractory).

"Pomalyst is the third drug in a class of immunomodulatory agents that includes lenalidomide and thalidomide, and is the second drug approved in the past year to treat multiple myeloma," said Richard Pazdur, M.D., director of the Office of Hematology and Oncology Products in FDA's Center for Drug Evaluation and Research. "Treatment for multiple myeloma is tailored to meet individual patient's needs, and today's approval provides an additional treatment option for patients who have not responded to other drugs."

In July 2012, FDA approved Kyprolis (carfilzomib) to treat multiple myeloma. Similar to Kyprolis, Pomalyst is being approved under the agency's accelerated approval program, which provides patients earlier access to promising new drugs while the company conducts additional studies to confirm the drug's clinical benefit and safe use. The therapy was also granted orphan product designation because it is intended to treat a rare disease or condition.

Pomalyst's safety and effectiveness was evaluated in a clinical trial of 221 patients with relapsed or refractory multiple myeloma. The trial was designed to measure the number of patients whose cancer completely or partially disappeared after treatment (objective response rate, or ORR). Patients were randomly assigned to receive Pomalyst alone or Pomalyst with low-dose dexamethasone, a corticosteroid.

Results showed 7.4 percent of patients treated with Pomalyst alone achieved ORR. The median duration of response has not yet been reached in these patients. In patients treated with Pomalyst plus low-dose dexamethasone, 29.2 percent achieved ORR with a 7.4-month median duration of response.

Pomalyst carries a Boxed Warning alerting patients and health care professionals that the drug should not be used in pregnant women because it can cause severe life-threatening birth defects, and that the drug can cause blood clots.

Because of Pomalyst's embryo-fetal risk, it is available only through the Pomalyst Risk Evaluation and Mitigation Strategy (REMS) Program. Prescribers must be certified with the Pomalyst REMS Program by enrolling and complying with the REMS requirements. Patients must sign a Patient-Physician agreement form and comply with the REMS requirements. In particular, female patients who are not pregnant but can become pregnant must comply with the pregnancy testing and contraception requirements, and males must comply with contraception requirements. Pharmacies must be certified with the Pomalyst REMS Program, must only dispense to patients who are authorized to receive the drug and must comply with REMS requirements. Both lenalidomide and thalidomide have similar REMS.

Common side effects include a decrease in infection-fighting white blood cells (neutropenia), fatigue and weakness, low red blood cell count (anemia), constipation, diarrhea, low levels of platelets in the blood (thrombocytopenia), upper respiratory tract infections, back pain and fever.

Pomalyst, lenalidomide and thalidomide are marketed by Celgene, based in Summit, N.J. Kyprolis is marketed by South San Francisco, Calif.-based Onyx Pharmaceuticals.

The FDA, an agency within the U.S. Department of Health and Human Services, protects the public health by assuring the safety, effectiveness, and security of human and veterinary drugs, vaccines and other biological products for human use, and medical devices. The agency also is responsible for the safety and security of our nation's food supply, cosmetics, dietary supplements, products that give off electronic radiation, and for regulating tobacco products.

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