<b>vidalista 20</b> is a tablet medicine that is used for treating erectile dysfunction (ED). It contains the active ingredient Tadalafil, which is a type of PDE-5 inhibitor. This drug helps to widen the blood vessels, increase blood flow and improve erection in men. It also works to help with pulmonary arterial hypertension (PAH) by relaxing the muscles in the lungs arteries to improve blood flow.