Sildenafil acts as the main ingredient in tablets of Fildena xxx 100 Mg. This is a drug that is used to treat the problem of impotence. Fildena xxx 100 Mg drug is taken 1 hour before sex, after which the effect lasts for 5-6 hours. It is important to consult a doctor before taking these tablets. These tablets must be taken only once a day. Fildena xxx is one of ED's most popular tablets.