Fildena 100 is mainly used for Ed in men. You should take fildena 100 mg only after the prescription drug from the doctors. Take medicine just 1 hour before the sexual activity. The main active sildenafil citrate starts working about 30- 60 minutes before your sexual plan, and its effect last 4 to 5 hours. With the help of medicine, you can improve your sex life!! And more enjoy romantic sex with your beloved women during a lovemaking session.