Filitra is a medication used to treat erectile dysfunction (ED), and its active ingredient is vardenafil, a PDE5 inhibitor. It improves erections by enhancing the natural physiological process that occurs during ****** stimulation rather than forcing an erection. Here’s how it works step by step: Mechanism of Action ****** stimulation triggers nitric oxide release in the penis. Nitric oxide activates an enzyme called guanylate cyclase, which increases levels of cyclic guanosine monophosphate (cGMP). cGMP causes the smooth Filitra  in the corpora cavernosa (erectile tissue) to relax. Relaxed muscles allow increased blood flow into the penis. The blood fills the sponge-like tissue, creating an erection. Vardenafil (Filitra) inhibits PDE5, the enzyme that breaks down cGMP. By preventing cGMP breakdown, Filitra prolongs the relaxation of penile blood vessels and allows for a stronger, longer-lasting erection. Erection occurs only with ****** arousal. Filitra does not create an erection on its own—it enhances the natural response to stimulation. Key Points Onset: Usually 30–60 minutes before ****** activity. Duration: Effects last 4–5 hours on average. Advantage: Helps men achieve firmer, longer-lasting erections without affecting libido.