Fildena 50 is a medication used to treat erectile dysfunction (ED) in men. It contains sildenafil citrate as its active ingredient, which is a phosphodiesterase type 5 (PDE5) inhibitor. The onset of action for Fildena 50 typically occurs within 30 to 60 minutes after ingestion. The duration of action can last for about 4 to 6 hours, providing a window of time during which improved erectile function may be experienced. https://www.genericday.com/fildena-50-mg.html