Tadacip 20 is a medicine used to treat men with erectile dysfunction. It helps to improve impotence by increasing blood flow to a man's penis tissues. It can be taken one hour before sexual intercourse. It can also be taken before or after eating. It has side effects, so it is best to take it once every 36 hours. This medicine should only be used by men over the age of 18. The effects of this drug last for 6 hours, so take it as directed.