Fildena Double is an oral pharmaceutical gel to combat erectile dysfunction. Sildenafil citrate is the key ingredient in this powerful and FDA-approved erectile dysfunction drug. It is a fast-acting drug that increases blood circulation in the male organ and allows men to have an erection without any problems if they do not have problems with arousal. Due to its energetic mechanism of action to increase blood circulation and inhibit PDE5 enzyme, scientists have observed that it is very useful and beneficial in treating flaccid erection.