Traditionally, the term “impotence” has been used to signify a male’s inability to attain and maintain an erection. Impotence, in most circumstances, is more precisely referred to as erectile dysfunction (ED). An estimated 10-20 million men suffer from the condition. However, this number is expected to increase dramatically, with an estimated figure of 322 million by 2025. Even though the prevalence of ED increases with age, it must be stressed that ageing itself is not a cause of ED as it is associated with metabolic syndrome, cardiovascular disease, diabetes mellitus and other non-communicable diseases, such as obesity.