Erectile dysfunction (ED) and impotence are two disastrous ailments for men, which may happen to any body irrespective of their age. Now a days there are millions of men who are suffering from erectile dysfunction worldwide. This has made people’s life miserable, as they are subjected to frustration shame and embarrassment. Hence, this hitch needs to be tackled in seriously. Erectile dysfunction (ED) is an ailment where in a person is unable to perform sexual intercourse because his penis is not getting or sustaining an erection. So the doctors have developed a new medicine to increase the sexual potency of the males which is commonly known as Viagra. Viagra has been found to be the most effective impotent drug. Sildenafil Citrate or Viagra, as we commonly know was first introduced in early 1998 and since then it has helped millions of men to improve their sexual life .