Fildena 25 is a medication for erectile dysfunction in men. This drug is effective in treating impotence and helps with it. This medication contains an active ingredient that aids men in getting a strong erection during sexual activity. Take this drug one hour before engaging in any sexual activity. Because of the possibility of side effects, take this medication no more than once every 24 hours. It is not recommended to take this medication with cold beverages or fatty foods as they will reduce its effectiveness. You should take this medication as directed by your doctor. The half-life of this medication is six hours.