Ambrican 5 Tablet is used to treat high blood pressure in the arteries of the lungs (pulmonary arterial hypertension). Hypertension is a medical condition in which the blood exerts high pressure (force exerted by circulating blood) against the walls of blood vessels. This condition makes the heart work harder in pumping the blood to the whole body. Pulmonary hypertension affects arteries in the lungs and the right side of the heart.