Macitentan and Tadalafil Combination Therapy in Patients with Pulmonary Arterial Hypertension and Cardiovascular Comorbidities: Real-World Evidence from OPUS and OrPHeUS.
Abstract
INTRODUCTION: Patients diagnosed with pulmonary arterial hypertension (PAH) often present with risk factors associated with cardiovascular disease, including diabetes mellitus (DM), hypertension (HTN), and obesity. The 2022 ESC/ERS pulmonary hypertension treatment guidelines recommend initial monotherapy with an endothelin receptor antagonist (ERA) or phosphodiesterase-5 inhibitor (PDE5i) for patients with PAH and cardiopulmonary comorbidities, with treatment escalation to be considered on an individual basis. Data on safety, tolerability, and effectiveness of combination therapy in these patients are lacking.
METHODS: OPUS (prospective, observational drug registry) and OrPHeUS (retrospective, medical chart review) were multicenter US studies of patients newly initiating the ERA macitentan (2013-2020). Patients in the combined OPUS/OrPHeUS dataset with PAH receiving combination therapy with macitentan and the PDE5i tadalafil were identified. Descriptive analyses were performed for patients with ≥ 1 of DM/HTN/obesity and those without these comorbidities.
RESULTS: In OPUS/OrPHeUS, 1336 patients with PAH received macitentan plus tadalafil during the observation period. Of these, 820 (61.4%) had ≥ 1 of DM/HTN/obesity and 516 (38.6%) had none of these comorbidities at or before enrollment. Median (Q1, Q3) exposure to macitentan and tadalafil combination therapy was similar at 13.7 (3.5, 28.0) and 14.8 (5.4, 27.4) months, respectively. For patients with ≥ 1 of DM/HTN/obesity…
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