FDA modifies boxed warning for pulmonary arterial hypertension drug Letairis
FDA modifies boxed warning for pulmonary arterial hypertension drug Letairis
The U.S. Food and Drug Administration today announced that monthly liver enzyme tests are no longer required for those taking Letairis tablets (ambrisentan), used to treat high blood pressure in the vessels that carry blood to the lungs (pulmonary arterial hypertension, or PAH).