Fildena Professional is a medicine marketed for the treatment of erectile dysfunction (ED). It contains sildenafil citrate, a PDE-5 inhibitor that works by increasing blood flow to the penis during sexual stimulation. It does not automatically cause an erection and requires sexual arousal to work. The medicine is generally taken before planned sexual activity, but the appropriate strength and timing should be determined according to medical advice. Taking more than the recommended amount does not necessarily improve results and may increase the risk of side effects.