Sarcoidosis-associated pulmonary hypertension (SAPH) is estimated to occur in at least 5% or more of sarcoidosis patients, and it contributes to significant morbidity and mortality. Optimal therapy for SAPH is not well established. We performed a 24-week open-label trial of tadalafil for SAPH at 2 academic medical centers. Subjects were required to have confirmed sarcoidosis plus a right heart catheterization within 12 months of enrollment showing a mean pulmonary artery pressure ≥ 25 mmHg, a pulmonary artery wedge pressure ≤ 15 mmHg, and a calculated pulmonary vascular resistance ≥ 3 Wood units. Subjects received 20 mg/day of tadalafil for the first 4 weeks and then 40 mg/day for the subsequent 20 weeks. Sixteen patients were screened, 12 of whom met criteria for enrollment. At 24 weeks, there was no overall improvement in 6-minute walk distance (6MWD). Five of the 12 subjects dropped out of the study early (2 for social reasons, 3 for medical reasons). There was no significant change in short form 36, St. George's respiratory questionnaire, or maximum Borg dyspnea scores over the 24 weeks. There were no significant adverse events or laboratory abnormalities clearly related to tadalafil in the cohort. The study did not meet the primary end point of change in 6MWD because of the small sample size. Tadalafil was generally safely administered in this cohort of SAPH patients. There was a relatively high dropout rate but no major adverse events and no clinical worsening. Larger studies are needed to explore this question further. (Trial registration: ClinicalTrials.gov identifier: NCT01324999) Keywords: sarcoidosis, pulmonary hypertension, tadalafil. Sarcoidosis is a multiorgan system disease of unknown etiology, characterized by noncaseating granulomatous tissue infiltration and inflammation. The most commonly affected organ system is the lung, most often in the form of alveolitis and/or parenchymal fibrosis and associated sequelae (such as bronchiectasis and cavity formation). Sarcoidosis-associated pulmonary hypertension (SAPH) is seen in at least 5% of patients with sarcoidosis 1 and more often in patients with advanced, end-stage disease. This higher frequency of SAPH is noted particularly in patients who are being evaluated for or awaiting lung transplantation, and increased mortality is noted in this population as well. [2][3][4][5] The optimal treatment approach to SAPH remains unclear.Conventional corticosteroid and immunomodulator therapies (such as methotrexate) utilized to treat sarcoidosis do not clearly improve SAPH. Furthermore, there is a relative paucity of data with regard to the utility of treating SAPH with pulmonary arterial hypertension (PAH)-specific therapies. We report the results of a prospective, openlabel trial of tadalafil therapy in a defined cohort of SAPH patients. The study was conducted at 2 academic medical centers in the United States.
METHODSThis was an investigator-initiated study, approved by the institutional review boards of the University of Cincinnati and the Univ...