The Food and Drug Administration (FDA) announced that a recent animal study suggests that children who use a cystic fibrosis pill made by Vertex Pharmaceuticals may be at risk for developing cataracts.
Kalydeco is the first drug to treat the underlying cause of cystic fibrosis, a serious disease that affects the lungs and digestive system.
The animal study showed rats that were seven to 35 days old developed cataracts after being given a dose of Kalydeco that was about a tenth of the maximum recommended dose, according to Reuters.
The drug was approved in January for patients aged six and up who have a specific defective protein which causes cystic fibrosis in nearly 4 percent of patients.
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