عني
Erectile dysfunction is often caused by insufficient blood flow to the penis, which makes it difficult to achieve or maintain an erection. Vardenafil, the active ingredient in Filitra 20 mg, works by inhibiting the phosphodiesterase type 5 (PDE5) enzyme, which usually limits blood flow to the penis. By blocking PDE5, Vardenafil helps relax the blood vessels, allowing for increased blood flow during sexual stimulation, thus facilitating the erection process.