The international pharmaceutical BCorp company Ferrer continues to strengthen its focus on pulmonary vascular and interstitial lung diseases by announcing the expansion of its current distribution agreement with United Therapeutics Corporation for Tyvaso a pharmaceutical drugdevice combination product authorized for the treatment of WHO Group 3 Pulmonary Hypertension associated with Interstitial Lung Disease PHILD and for WHO Group 1 Pulmonary Arterial Hypertension PAH.