Fildena 150 mg Tablet is a popular brand of Sildenafil Citrate is a drug mainly used to treat erectile dysfunction in men. Erectile dysfunction, commonly known as impotence, a s*xual disability in which a man cannot get or maintain an erection during s*x. fildena medicine used to treat erectile dysfunction in men. It contains an active ingredient that is an FDA-approved drug. It is a fast-acting drug that can last up to four hours. It works to enhance your masculinity by giving you erectile strength while having s*x with the partner. Erection failure is a common problem today that almost all adult men have to deal with.