An Extension Study of Treprostinil Palmitil Inhalation Powder (TPIP) for Pulmonary Hypertension Associated With Interstitial Lung Disease (PH-ILD)

Inclusion Criteria: * Participants who completed the end of treatment visit in Study INS1009-211 (NCT05176951). Participants for whom the OLE study was not available at the time of their completion of the lead-in study are eligible for enrolment within one year of their lead-in end of treatment visit. * Complete baseline screening assessments to confirm eligibility to participate if more than 30 days have elapsed since the end of the study visit in Study INS1009-211, or any other lead-in PH-ILD TPIP study. * Capable of giving signed informed consent that includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol. Exclusion Criteria: * Participants who experienced any hypersensitivity or adverse drug reaction or were withdrawn early/discontinued in a previous PH-ILD TPIP study, which in the opinion of the Investigator, could indicate that continued treatment with TPIP may present an unreasonable risk for the participant. * Initiation of parenteral administration of prostacyclin analogues (eg, TRE, epoprostenol) since the completion of Study INS1009-211 or other TPIP studies. Initiation of inhaled prostacyclin analogues (eg, TRE \[Tyvaso\] or iloprost) and oral prostacyclin analogues (eg, TRE \[Orenitram\]) or receptor agonists (eg, selexipag) are permitted if stopped 24 hours prior to the start of study drug administration. Pregnant or breastfeeding. Male and female participants must use contraceptives that are…