Fildena drug is a prevalent drug. Which is a widely used drug to solve the problem of impotence. Fildena drug is taken 1 hour before intercourse, after which the effect lasts for 4-5 hours. Sildenafil acts as the active ingredient in the drug Fildena. Fildena drug is also found in different potencies. This is why you have your sex is the best drug of ED.