Used primarily in the treatment of pulmonary arterial hypertension (PAH), it helps to dilate blood vessels, reducing blood pressure in the lungs and improving exercise capacity. It is also employed in managing Raynaud's phenomenon, where it aids in preventing digital ulcers by improving blood flow to the extremities. Additionally, it has shown potential in treating conditions related to ischemia and reperfusion injury due to its vasodilatory and anti-inflammatory properties.