A Study Evaluating the Safety and Tolerability of Artesunate in Patients With Pulmonary Arterial Hypertension

This is a 20-week, Phase 1, single-center, open-label, dose-escalation study evaluating the safety and tolerability of daily oral artesunate in patients with PAH.

Inclusion Criteria * Each participant must meet the following criteria to be enrolled in this study: * Adults aged 18 to 75 years. * WHO functional class I, II/III despite treatment with maximally tolerated doses of 2 or more treatment modalities including PDE5 inhibitors, guanylate cyclase stimulators, endothelin receptor antagonists, and prostanoids when appropriate. Exclusion Criteria * Participants who meet any of the following criteria will be excluded from the study. * Participants with serious concomitant morbidity per investigator assessment.