<prompt> The only FDA approved therapeutic use of Endothelium-Derived Relaxing Factor isPulmonary hypeension in newbornPrimary pulmonary hypeensionCongestive cardiac failureEssential hypeension in newborn  <response>: EDRF is also called nitric oxide. The only approved use is vasodilatation in Pulm.HTN in newborn Ref: Goodman Gillman 12thedPg 1059 