[Contemporary aspects of using sildenafil].

Sildenafil has been thoroughly studied in 74 registered double-blind, placebo-controlled clinical trials assessing the efficacy and safety of the drug in a total of more than 16 000 men with erectile dysfunction (ED). However, practicing urologists have some questions regarding administering the drug in patients with multiple comorbidities. In this review, on a par with the now "classic" research, we outline the latest updates of meta-analyzes and comparative studies relating to the use of sildenafil in different groups of patients. We also discuss the problem of self-discontinuation of sildenafil therapy and the possible risks of using counterfeit phosphodiesterase type 5 inhibitors (PDE-5i).