Vidalista 40 mg is used to treat erectile dysfunction (impotence, the inability to get or maintain an erection) in men. This pill is used to treat erectile dysfunction or impotence in men. Taking this pill improves the blood flow in the male penis and this will give him a stronger erection during sex. For best results, you should take this pill 30-40 minutes before sexual intercourse. But if you are currently suffering from a heart attack/stroke, you should inform your doctor before taking this medicine. This medicine should be taken once in 24 hours. If you take higher doses, you will experience side effects. Children and women should not take this medicine. Only men 18 years and above can take it.