One of the most essential medications for treating erectile dysfunction and impotence in males is Vidalista 20. A component in this medication called tadalafil helps men achieve a powerful erection during sexual activity. Take this medication half an hour before sexual activity. Consume water together with this medication. This medication can be used either before or after a meal. This medication takes 36 hours to take effect. This is a male-only medicine. Follow your doctor's advice when taking this medication.