Fildena 120 Mg works by blocking the PDE5 enzyme, which breaks down cGMP, a substance that helps relax blood vessels. This allows for enhanced blood flow to the penis, leading to a stronger and longer-lasting erection.Onset of Action: The effects typically begin within 30 to 60 minutes of taking the tablet.Duration of Action: Its effects last for approximately 4 to 6 hours, giving men ample time to enjoy sexual activity.