Fildena is a drug made from a drug called Sildenafil. There are many doses of Fildena available to us. Fildena is used to treat a disease called impotence. Fildena should be taken within 1 hour of sex which will give you 4 to 6 hours of effectiveness Fildena 100 is an effective dose of Fildena. You can take this medicine at 10% discount