The active pharmaceutical element of Fildena, a drug for erectile dysfunction in men, is sildenafil citrate. PDE-5 inhibitors function by amplifying the effects of nitric oxide, a naturally occurring substance that relaxes the penis muscles. Men who are sexually stimulated can obtain and sustain an erection with the help of this mechanism, which increases blood flow. Consumption of alcohol is another important dietary factor to take into account. Drinking alcohol can make Fildena 100 side effects like lightheadedness and dizziness worse and make it harder to get an erection. If you are a male above the age of 18 and suffer from erectile dysfunction or impotence.