Vidalista is a drug that is taken to treat erectile dysfunction in men. Tadalafil, the main ingredient in this medicine, plays an important role. This medicine works by relaxing the blood vessels and increasing the blood flow to the muscles. Consult a doctor before taking this medicine. This medicine is usually taken only once. The effect of this drug is inevitable to take about 30 minutes or 1 hour. You should not take this medicine if you have any type of allergy or are taking other medicines.