The main ingredient of the popular drug Fildena 120, which is used to treat erectile dysfunction in men, is sildenafil. Many guys now think that taking Fildena will help them with their erectile dysfunction. You can get Fildena with a prescription.Because of the drug’s potency, you can have an erection for a long time after taking it. Fildena may help men who suffer from erectile dysfunction (ED) get and maintain an erection. The FDA-approved drug Fildena increases blood flow by relaxing blood arteries.