Fildena 50 mg is a member of the class of medications known as PDE5 inhibitors, which are prescribed to treat ED. The chemical substance Sildenafil Citrate, commonly known as Generic Viagra or Generic Sildenafil, is used to make it. The cost of Fildena 50 mg is lower than that of any other name-brand ED medication. Various strengths of fildena are available based on the appropriate dosage for each patient. One kind of male sexual dysfunction called ED is treated with a prescription for 50 mg of fildena. Erectile Dysfunction (ED): Of all the sexual dysfunctions, ED is the most common in males. It is the inability to achieve an erection strong enough for sexual engagement.