Sexual pleasure has become very necessary for men when men do not get erections during intercourse. Fildena 50 is the best medicine to treat sexual problems in men like impotence, erectile dysfunction, and premature ejaculation. This medicine contains an ingredient called sildenafil which helps in increasing the blood flow to the tissues of the penis in men. You can take this medicine before or after food. The effect of this medicine lasts for 4 to 6 hours.