Pharmacology All India exam a694e93b The only FDA approved therapeutic use of Endothelium-Derived Relaxing Factor is A Pulmonary hypeension in newborn B Primary pulmonary hypeension C Congestive cardiac failure D Essential hypeension in newborn High-Yield Explanation EDRF is also called nitric oxide. The only approved use is vasodilatation in Pulm.HTN in newborn Ref: Goodman Gillman 12thedPg 1059