Fildena 25 mg Pills can be used to treat impotence and erectile dysfunction in men. The only people who should use this medication are men over the age of 18. The active ingredient in this drug is sildenafil. This drug aids in a firm erection in men during sexual activity. Take this medication 30 minutes before engaging in sexual activity with your partner to ensure that your time together is enjoyable. You can take this medication with or without food. Drink water while taking this medication. You can take this medication as directed by your doctor. It takes four to six hours for this medication to start working.