Filagra 100 is taken by men to treat sexual problems. This medicine is effective and beneficial for impotence and erectile dysfunction. This medicine contains an ingredient called sildenafil which helps in increasing the blood flow to the tissues of the penis in men. Take this medicine with water but do not break or chew the claim. The effect of this medicine lasts for 4 to 6 hours. You can take this medicine before or after food. Do not consume spicy food or cold drinks with this medicine.