Vidalista 20mg is a prescription medicine used to treat erectile dysfunction (impotence) in men. It works by increasing blood flow to the penis. This helps men to get or maintain an erection. Take this medicine 1 hour before intercourse so that you can enjoy intercourse with your partner. The effect of this medicine lasts for 6 hours so take this medicine only once in 24 hours. You can also take this medicine before or after a meal. Take only as advised by the doctor. You can take this medicine with water but do not break or chew the medicine.