The term ED means Erectile dysfunction. It is a sexual related diseases. Lots men are not able to achieve the erection for long hours with their life partner in bed. This problem is easily cured by using the powerful medicine Sildenafil citrate. This medicine is more useful to a normal man's relationship life. This medicine acting more fast in man's body and gives good results. Lots of men are like to buy this medicine. This medicine is come into the pharmacy market in the name of viagra or generic viagra. The cost of this medicine is also cheap.