Sildenafil acts as the active ingredient in Fildena xxx 100 tablets. Fildena xxx 100 tablets are taken 1 hour before intercourse, after which the effect lasts for 4-5 hours. Fildena xxx 100 is one of the best tablets for impotence. Seek medical advice before taking Fildena xxx 100 Mg. Fildena xxx 100 is widely used. Fildena xxx 100 is not a tablet for women to use so women should not use it and consult a doctor if you are still suffering from this type of problem.