Ambrisentan

Drug Details

Ambrisentan, marketed under the brand name Letairis, is a medication prescribed for the treatment of pulmonary arterial hypertension (PAH), which is high blood pressure in the vessels of the lungs. It functions as an endothelin receptor antagonist, which means it blocks the effects of endothelin-1, a substance that can cause blood vessels to constrict. By inhibiting this protein, Ambrisentan helps to relax and widen the blood vessels, reducing the workload on the heart and enabling better blood flow. This action helps to lower blood pressure in the lungs, slow the progression of symptoms, and improve exercise capacity. Typically administered as a daily tablet, Ambrisentan is generally well-tolerated. However, it may cause swelling in the arms or legs and poses significant risks during pregnancy, necessitating its distribution through the Ambrisentan REMS program for individuals who can become pregnant. Always consult with a healthcare provider before starting any new medication to ensure it is safe and appropriate for your condition.