Fildena 100 takes 30 to 60 minutes to start functioning, so take it well ahead of time before your planned intercourse. A large supper may prolong the start of effect. This drug only works in conjunction with sexual stimulation, thus taking it alone will not result in an erection. Fildena's impact lasts between 4 and 6 hours. Fildena 100 for sale at Genericvilla.