Tadalafil is a popular solution to erectile dysfuntion. This comes in liquid form of 30mg/ml in a bottle. Generally, Tadalafil is also for treating pulmonary arterial hypertension. Specifically, it eases the muscles and at the same time promotes great blood circulation around the body. Tadalafil also remarkably increases the blood vessels in the penis. The same also happens to the blood vessels in the lungs.