Fildena 50 is best for treating male sexual problems. This medicine is only taken by men aged 18 to 65 years. This medicine contains an ingredient called sildenafil which helps in increasing 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. This medicine is taken 30 minutes or 1 hour before intercourse. Do not consume fatty foods or alcoholic beverages with this medicine.