Fildena Double 200 mg is a treatment for impotence and erectile dysfunction in men. When men engage in sexual activity, this medication helps to arouse their sexual desire. sildenafil, one of the ingredients in this drug, helps to increase blood flow to the tissues in men's penile organs. Take this medicine 30 minutes before engaging in sexual activity to maximize the time you spend with your partner. Drink water while taking this medication. Don't break or chew the prescription. You can take this medication with or without food. Adhere to your doctor's instructions when using this medication. The half-life of this medication is 24 hours.