The U.S. Food and Drug Administration today approved the first drug for cystic fibrosis directed at treating the cause of the disease in people who have two copies of a specific mutation.

Orkambi (lumacaftor 200 mg/ivacaftor 125 mg) is now approved to treat cystic fibrosis (CF) in patients 12 years and older, who have the F508del mutation, which causes the production of an abnormal protein that disrupts how water and chloride are transported in the body. Having two copies of this mutation (one inherited from each parent) is the leading cause of CF.

“The FDA encourages manufacturers to develop new and innovative treatments for serious rare diseases like cystic fibrosis,” said John Jenkins, M.D., director of the Office of New Drugs, Center for Drug Evaluation and Research. “Today’s approval significantly broadens the availability of targeted treatments for the specific defects that cause cystic fibrosis.”

Orkambi received FDA’s breakthrough therapy designation because the sponsor demonstrated through preliminary clinical evidence that the drug may offer a substantial improvement over available therapies. The FDA also reviewed Orkambi under the priority review program. A priority review is conducted over six months, or less, instead of the standard 10 months, and is employed for drugs that may offer significant improvement in safety or effectiveness in treatment over available therapy in a serious disease or condition.

In addition, the FDA granted Orkambi orphan drug designation because it treats cystic fibrosis, a rare disease. Orphan drug designation provides financial incentives, like clinical trial tax credits, user fee waivers, and eligibility for market exclusivity to promote rare disease drug development.

For more details, go to: http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm453565.htm