This study is testing MK-5475 in people with pulmonary hypertension (high blood pressure in the blood vessel of the lung) linked to COPD (a chronic lung disease where it is hard to breathe). You may be able to join Part 2 of this study if you have pulmonary hypertension linked to COPD, and you are at least 40 years old but not more than 80 years old. About 24 subjects will be in Part 2 of this research. People from Part 1 of this study may be allowed to enter Part 2.
This study is investigating a way to deliver the same medication (treprostinil) that you know as Tyvaso with a much smaller device. This involves combining a dry powdered form of treprostinil with a small, portable dry powder inhaler. In this form, Treprostinil Inhalation Powder will be referred to as "study drug" or "TreT". The TreT powder will be released from the inhaler when you breathe in. The purpose of this research study is to investigate the safety and how well TreT is tolerated in participants with PAH currently treated with Tyvaso. In addition, the levels of Tyvaso and the TreT in your blood will be determined. About 45 subjects will participate in this study from about 20 medical centers. Your participation in this study is voluntary and will last approximately 7 weeks (this may include a 2-week screening period plus the 5-week study period).
The purpose of this study is to assess safety of the study drug, inhaled treprostinil, and the ability to tolerate long-term treatment with the study drug in patients with PH-COPD. The study will also evaluate the effectiveness of the study drug over long-term treatment. Inhaled treprostinil is a medication that will be given to you by a handheld inhalation device (study nebulizer) called the Tyvaso® Inhalation System. The study is estimated to last 2 to 3 years but could be much shorter or longer. Depending on the final number of subjects who participated in the RIN-PH-304 study, either approximately 136 or approximately 314 subjects may be eligible to participate in this study from the U.S. study centers.
The PHAR is a multicenter, prospective registry of newly evaluated patients at PHCCs in the United States who have either PAH or CTEPH. Baseline information will be collected at the time of initial evaluation at the PHCC (within six months of the initial outpatient PHCC visit) with follow-up data collected at approximately 6-month intervals. This study will determine how patients with PH are evaluated, tested, and treated, and will observe how well patients do. The goal of the project is to see if patients with PH are treated according to recommended guidelines and to see if there are certain factors which lead to better or worse outcomes in patients with PH. There is no intervention or study medication used and there is no limitation to how a patient is treated in this study.
The purpose of this study is to evaluate the effectiveness of inhaled treprostinil in improving exercise ability in patients with PH (Pulmonary Hypertension) -COPD (Chronic Obstructive Pulmonary Disease) when compared to an inactive solution, or placebo. This is a 34-week study. Approximately 136 subjects will be enrolled at approximately 60 US centers in the Original Design. If the study is adapted to the Contingent Design, approximately 314 subjects will be enrolled at approximately 80 US centers.
Subjects with Pulmonary Arterial Hypertension (PAH) will be asked to have blood drawn at their standard of care visit. Children (11 years and older) and adults are eligible. This study is voluntary. Blood samples obtained and the associated blood products and clinical/genetic data will be in the research study for a minimum of five years.