Sildenafil Citrate is found in fildena 50 tablet of as an active ingredient. Used to treat men suffering from erectile dysfunction. The effect of this drug lasts for 4 to 6 hours. And if the effect of this medicine lasts for more than 6 hours, consult a doctor immediately. If you want to see the good effect of this medicine and do not want to see any serious side effects, consult your doctor before using this medicine.