Sildenafil acts as the main ingredient in Fildena Professional 100 drug. Fildena Professional 100 is taken 1 hour before sex, after which the effect lasts for 5-6 hours. It is important to consult a doctor before taking Fildena Professional 100 Mg. Fildena Professional 100 mg is the best drug for millions of people around the world to solve the problem of ED. Take this only once a day.