Condition Treated: Tablet is a medicine used to treat high blood pressure in the blood vessels that supply the lungs (pulmonary arterial hypertension). 
Usage: Tablet may be taken on an empty stomach or with a meal, but it should be taken at a fixed time each day.
Side Effects: The most common side effects of this medicine include flushing, headache, muscle pain, diarrhea, pain in limbs, back pain, and blurred vision.