This version is not peer-reviewed. Myroslav Lutsyk,Jonathan Green,Igor Albitskiy,Gil Bar-Sela * Myroslav Lutsyk,Jonathan Green,Igor Albitskiy,Gil Bar-Sela * You are already at the latest version Phosphodiesterase type 5 inhibitors (PDE5I) are used to treat erectile dysfunction, as they increase blood flow to the penis during sexual stimulation, supporting erection maintenance. There is limited evidence that their use increases survival in various types of cancer.