Fildena 50 mg is a widely used medication for treating erectile dysfunction (ED) in men. It contains 50 mg of sildenafil citrate, the same active ingredient found in Viagra. Sildenafil works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which helps relax the blood vessels in the penis, allowing for increased blood flow. This enhanced blood flow leads to a firm and sustained erection when sexually aroused. Fildena 50 mg is considered a fast-acting medication. After taking a dose, users typically begin to experience the effects within 30 to 60 minutes.