Erectile dysfunction is typically defined as the inability of a man to develop or maintain the erection of penis during sexual intercourse. This results in the inability of man to have an erection that is hard enough for a sexual intercourse. This problem becomes more persistent in men as they grow older. Although it may happen commonly in all men but frequent appearance of the problem may lead to severe mental disturbance and complications in a man’s life. Erectile dysfunction has been found to be one of the major causes for depression and heart diseases.