Sildenafil is the active ingredient in Fildena 120. Fildena 120 mg has a four to five-hour half-life when taken one hour before sexual activity. It's more fun to have sex after taking 120 mg of Fildena. It's imperative that you see a doctor before using Fildena 120 Tablets. See a physician prior to taking sildenafil. Superb these tablets are the best ED treatment available, and they are taken widely.