Tadalafil is an oral drug for the treatment of ED, used in the treatment of erectile dysfunction and premature ejaculation, erectile function impairment and premature ejaculation has very significant improvements. There are over 1500 documents to prove the caused by different causes impotence premature ejaculation, knew the success rate is above 80%, and show its reliable curative effect, through the use of more than 20 million people worldwide, proved its long-term stability, the safety of 25 to 60 minutes of work function to coincide with a time needed for foreplay, knew the time adjustment in the highest drug concentration time, help both husband and wife a satisfactory sex life.