Fildena XXX 100 is a drug made from a drug called sildenafil. This drug works to speed up the flow of blood in the body which is the main problem of the disease called impotence. This medicine works to free all the blood vessels in the body. Fildena XXX 100 is an effective dose of Fildena. You should take this medicine only once a day. If you take it more often, you will face side effects of this medicine.