macitentan

Macitentan is a medication used to treat pulmonary arterial hypertension, a condition where high blood pressure occurs in the arteries of the lungs. It works by blocking certain substances (endothelin) that cause blood vessels to constrict and become narrow. By doing so, macitentan helps relax and widen the blood vessels, reducing the pressure in the lungs and making it easier for the heart to pump blood. This improves symptoms like shortness of breath and fatigue, and can help slow the progression of the disease. It is typically prescribed under the supervision of a healthcare provider.