SILVER SPRING, Md. and RESEARCH TRIANGLE PARK, N.C., Jan. 13, 2021 /PRNewswire/ -- United Therapeutics Corporation (Nasdaq: UTHR) today announced that results from the INCREASE clinical study of Tyvaso® (treprostinil) Inhalation Solution for the treatment of pulmonary hypertension associated with interstitial lung disease (PH-ILD) have been published online in the New England Journal of Medicine. Results from INCREASE, the largest and most comprehensive completed study of adult patients with PH-ILD, showed that treatment with inhaled Tyvaso was well tolerated and improved the exercise capacity measure of six-minute walk distance (6MWD) by 31 meters relative to placebo at Week 16 (p