Vidalista Black 80 is used to treat impotence and erectile dysfunction in men. This medicine contains an ingredient called tadafil which helps to increase blood flow to the penis tissues of a man. Take this medicine 30 minutes before intercourse. The effect of this medicine lasts for 4 to 6 hours. You should not consume fatty foods or cold drinks with this medicine as it slows down the effect of the medicine. You can also take this medicine before or after a meal. You should take this medicine as advised by your doctor.