Fildena 100 is a prescription medicine that is used to treat impotency or erectile dysfunction (ED) in men. The medicine is taken to increase blood flow to the penile area and improve erectile function. Sildenafil is the active ingredient in this medicine. This medicine helps you to get and maintain an erection for a long time. Take this medicine half an hour before sexual intercourse. You will be able to enjoy sex with your sexual partner for 4-6 hours after taking this medicine. This medicine should be taken after consulting a doctor. Women should not take this medicine.