Filitra 20 is a medication used to treat erectile dysfunction (ED) in men. It contains the active ingredient Vardenafil, which is a phosphodiesterase type 5 (PDE5) inhibitor. Like other PDE5 inhibitors, Vardenafil works by increasing blood flow to the penis, which helps men achieve and maintain an erection when sexually stimulated. The effects of Vardenafil, such as those in Filitra 20, can last for approximately 4 to 5 hours. This means it provides a window of opportunity for sexual activity within that time frame.