Beraprost sodium salt is primarily used in the treatment of pulmonary arterial hypertension (PAH). It works by dilating blood vessels and inhibiting platelet aggregation, which helps to reduce blood pressure in the lungs and improve blood flow. This medication is particularly beneficial for patients experiencing symptoms like shortness of breath, fatigue, and chest pain due to PAH. Additionally, it is sometimes used in the management of chronic arterial occlusion and other vascular disorders to enhance circulation and prevent complications. Its vasodilatory and antiplatelet properties make it a valuable therapeutic option for improving cardiovascular health in specific patient populations.