RESEARCH TRIANGLE PARK, NC – January 3, 2018 – Liquidia Technologies, Inc., a late-stage clinical biopharmaceutical company focused on improving the performance of medicine by precisely engineering drug particles, today announced the initiation of a Phase 3 clinical trial evaluating LIQ861 for the treatment of pulmonary arterial hypertension (PAH). LIQ861, developed using Liquidia’s proprietary PRINT® technology, is a powder formulation of treprostinil designed for deep-lung delivery using a disposable, dry powder inhaler (DPI). PAH is a chronic, progressive disease caused by the hardening and narrowing of the pulmonary arteries, which often results in heart failure. Previously approved by the U.S. Food and Drug Administration (FDA) in oral, nebulized and parenteral formulations, treprostinil is a synthetic analog of prostacyclin, a vasoactive mediator deficient in patients with PAH yet essential to normal lung function to regulate vessel tone.