Pulmonary arterial hypertension can cause shortness of breath, tiredness, dizziness, chest pain and swelling in your ankles and legs. It is caused by thickening of walls of the arteries that supply your lungs making it hard for blood to get through. Opsutan Tablet relaxes the blood vessels and can help lower the blood pressure in the arteries of your lungs. You will be able to carry out your daily activities more easily and feel less tired or dizzy.