FDA Panel to Weigh Form of Viagra for Lung Disorder

A form of Pfizer Inc.’s erection drug Viagra, sold as the blood-pressure treatment called Revatio in adults, may be used for children with a rare lung disorder if U.S. regulators can agree on how to test it.

The condition, called pulmonary arterial hypertension, affects only 600 children a year, New York-based Pfizer said. It causes high blood pressure in arteries in the lungs, making the right side of the heart work harder than normal and causing chest pain, dizziness and fatigue. Outside advisers to the Food and Drug Administration are set to meet July 29 to evaluate whether Pfizer’s study of Revatio is sufficient to determine its effectiveness in children, the agency said today.