Buy Fildena 100 for Erectile Dysfunction: Effective Treatment for Impotence. This treatment is based on the use of Sildenafil as a drug in men. It helps with blood flow, thereby aiding in an erection. Fildena 100 is a variety of "sildenafil citrate" which helps with erections and has been linked to causing cardiac events, but it's still FDA-approved and safe to be taken on a daily basis. This drug is typically offered at a 10 mg dosage which can help patients achieve successful erections for up to 36 hours.