Sildenafil is a drug used to treat erectile dysfunction in men with mild or moderate severity.


The purpose of this study was to state the evaluation and clinical data reported in available literature. The aim of the study was to compare the efficacy of Viagra sildenafil with other medications in treating erectile dysfunction in men with mild or moderate degree.


A review of the available published literature was performed using the PubMed, Lycos and Scopus databases. The catalogued articles, which had the reported treatment effects were studied and analyzed.


The study concluded that smokers have a rate of treatment-resistant erectile dysfunction of 36.2 %. Participants and their partners were successful in the treatment maintenance without the main treatment methods.


This study indicates that Viagra sildenafil, especially in varicocele is a safe treatment for mild to moderate erectile dysfunction.