An effective medication for treating erectile dysfunction and impotence in men is Tadalista 40 tablet. An ingredient in this medication called Tadalafil helps men achieve a strong erection during sexual activity. Take this medication half an hour before sexual activity. Consume water along with this medication. This medication can be taken either before or after a meal. This medication takes 4 to 6 hours to take effect. This is a male-only drug. Follow your doctor's advice when taking this medication.