A medication called fildena 100 is used to treat male erectile dysfunction. This medication is a highly successful treatment for impotence. The medication comprises dapoxetine and sildenafil, which help men's penile tissues receive more blood flow. Take this medication half an hour before engaging in sexual activity with your partner to extend your sexual time together. This medication takes four to six hours to take effect. As directed by the physician, take this medication. This medication can be used either before or after a meal.