The active ingredient is tadalafil contained in tadarise 40. It is a pill for erectile dysfunction. It works by increasing blood flow to the penile area. And during sex sessions help to achieve and maintain a hard erection for a long time spent with your sex life. The Tadarise 40 pill helps to relax the muscles and penile veins of the body which allows blood flow to that part. It enables you to achieve a harder and stronger erection during lovemaking sessions. This drug can only be taken by men.