Men with erectile dysfunction (impotence) can treat it with the prescription medication Fildena 100 Tablet. It is one of a class of medications known as phosphodiesterase type 5 (PDE 5) inhibitors, which is used to treat a variety of conditions. This aids in the erection and maintenance of males. The medication Fildena 100 vs viagra is only for men. Take this medication half an hour before sexual activity. This medication can be used either before or after a meal. Avoid taking Fildena 100 mg too often because its effects endure for four to six hours. Follow your doctor's advice when taking this medication.