Study LTI-401 is an open-label, multicenter study which will evaluate the safety and tolerability of LIQ861, the study drug, in subjects who have World Health Organization (WHO) Group 1 & 3 Pulmonary Hypertension. The purpose of this research study is to evaluate the long-term safety and tolerability of LIQ861 in patients with WHO Group 3 Pulmonary Hypertension associated with interstitial lung disease (PH-ILD). The investigational form of Treprostinil in this study is called LIQ861, it is delivered to your lungs using a hand-held device called a dry powder inhaler (DPI). Dose levels may be adjusted by the Study Doctor between 26.5 micrograms to 318 micrograms based on your PH-ILD symptoms. The study will include approximately 60 subjects and participation will last 52 weeks.

This is a Phase 3, randomized, double-blind, placebo-controlled, multinational, efficacy and safety study of subjects with PPF (Progressive Pulmonary Fibrosis) treated with inhaled treprostinil over a 52-week period. This study is investigating whether a drug called inhaled treprostinil (brand name Tyvaso®) works to help people with PPF improve their lung function tests. The purpose of this research study is to see how well inhaled treprostinil works in participants with PPF and to gather information on how safe it is. This study will look at changes in your breathing tests, also called lung function tests. About 698 people will participate in this study from about 150 medical centers. Your participation in this study is voluntary and will last approximately 58 weeks. This time includes a Screening Period that could last up to approximately 6 weeks plus a 52-week Treatment Period.

This multicenter, randomized, double-blind, placebo-controlled, parallel-group clinical
study is designed to evaluate the safety and tolerability of 3 dose levels of TTI-101 vs placebo in participants with idiopathic pulmonary fibrosis (IPF). a screening period of up to 28 days, 100 participants will be randomly assigned to receive 1 of 3 dose levels of TTI-101 (25 participants per dose level) or matching placebo (25 participants). Enrollment will be stratified by current use of nintedanib. The assigned study drug will be self-administered orally in tablet form twice daily (BID) with a glass of water after a meal. Once randomized, each participant will maintain their current standard of care supportive medications, including cough treatment, medications for symptom relief or quality of life improvements, oxygen therapy where indicated, respiratory physiotherapy, and treatment of comorbidities. Following randomization, all participants will enter the 12-week, double-blind treatment period.

This is a Phase 3, randomized, double-blind, placebo-controlled, efficacy and safety study of subjects with IPF treated with inhaled treprostinil over a 52-week period. This study is investigating whether a drug called inhaled treprostinil (brand name Tyvaso®) works to help people with IPF improve their lung function tests. The purpose of this research study is to see how well inhaled treprostinil works in participants with IPF and to gather information on how safe it is. This study will look at changes in your breathing tests, also called lung function tests. About 396 people will participate in this study from about 100 medical centers. Your participation in this study is voluntary and will last approximately 58 weeks. This time includes a Screening Period that could last up to approximately 6 weeks plus a 52-week Treatment Period.