Fildena 100 mg typically starts working within 30 to 60 minutes after ingestion, though the onset may vary among individuals. Its effects can last for up to 4 to 6 hours, during which time men may experience improved erectile function. Sildenafil citrate, the active ingredient in Fildena 100 mg, belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. It works by inhibiting the action of PDE5 enzyme, which helps to increase blood flow into the pill during physical stimulation, thus aiding in achieving and maintaining an erection. https://www.onemedz.com/product/fildena-100-mg/