Persistent Pulmonary Hypertension (PPHN)
Convenient administration for newborns.
When a baby is born, pressure in the blood vessels of the lungs is high; this pressure starts to fall when normal breathing is established. Sometimes, this transition does not occur and pressure remains high, preventing blood from flowing to the lungs to deliver adequate oxygen, a life-threatening situation referred to as “persistent pulmonary hypertension” (PPHN) of the neonate.
PPHN occurs in as many as 6.8 of 1,000 live births. Mortality is approximately 10% to 20%. Sildenafil is prescribed “off label” to treat PPHN. Recent studies have found that administration of sildenafil in PPHN is associated with a significant increase in the oxygenation and a reduction in mortality with no clinically important side effects.
Administration of sildenafil in infants is via continuous IV infusion. This parenteral fluid administration can be lifesaving; however, it also carries substantial risks, especially in newborns. Reported studies in infants have utilized preparation of sildenafil solution by crushing 50-mg tablets to improve administration of the drug. Our market research indicates that Sildenafil Oral Spray would be welcomed by pediatricians as an alternative, convenient route of administering sildenafil to infants.