Tadarise 20 is a treatment for impotence in men. One ingredient in this drug, tadalafil, helps to increase blood flow to the tissues of the penis in men. In order to enjoy sexual activity with your partner, you take this medication half an hour before engaging in sexual activity. You should take this medication as directed by your doctor. The half-life of this medication is 36 hours. You can take this medication with water, but don't chew or break the tablet.