Pilot study of short-term effects of a novel long-acting oral beraprost in patients with pulmonary arterial hypertension.

Background Oral prostacyclin analogs can improve the prognosis of patients with mild to moderate pulmonary arterial hypertension (PAH), but because they often provoke adverse effects, such as flushing and dizziness, administering the optimal dose can be difficult. Methods and Results In the present study, a novel long-acting oral beraprost (TRK-100STP: 0-360 μg/day for 12 weeks) was administered to 4 patients with mild to moderate PAH. The patients tolerated the drug well with mild adverse manifestations and negligible effects on the systemic circulation. In contrast, pulmonary vascular resistance decreased by 27±12% and the 6-min walk test distance increased by 11±11%. Conclusions TRK-100STP is a novel option in the medical management of patients with PAH. (Circ J 2007; 71: 1829 -1831)