Vidalista is used to treat men who have erectile dysfunction ED (also known as impotence). tadalafil works by increasing the flow of blood to the penis during sensual intensity. This can cause an erection due to increased blood flow. Usually, this medicine starts working within 30 minutes of taking it. It affects for four to six hours. With this medicine, you can have more sex for longer. This medicine should be taken only after consulting a doctor.