Fildena is known as a generic Viagra tablet. In which sildenafil acts as the active ingredient. The main use of these tablets is impotence i.e. when a man experiences a problem during erection, Fidel's tablets are used as a solution. The effect lasts for... moreFildena is known as a generic Viagra tablet. In which sildenafil acts as the active ingredient. The main use of these tablets is impotence i.e. when a man experiences a problem during erection, Fidel's tablets are used as a solution. The effect lasts for 4-5 hours after you take Fildena tablets. You will only notice the effect of Fidel's tablets when you are truly sexually eager. Consult a doctor before taking Fildena.