Abstract
There are currently 12 medications approved for use in the treatment of pulmonary arterial hypertension (PAH) in adults. These include endothelin receptor antagonists, phosphodiesterase type 5 inhibitors, soluble guanylate cyclase stimulators, and prostacyclins. However, in children there are no approved targeted PAH medications, with the exception of inhaled nitric oxide for treatment of hypoxemic respiratory failure in neonates. This review will address some of the challenges in the development of treatments for children, including lessons from recent trials, endpoints for clinical trials, and challenges with drug approval in children.
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