Fildena 100 Pill is a phosphodiesterase type 5 (PDE5) inhibitor, prescribed for erectile dysfunction and impotence in men. Erectile dysfunction is the inability to achieve or maintain an erection long enough to perform intercourse. It relaxes the blood vessels in the penis, allowing more blood to enter to achieve an erection. It can also be used in pulmonary arterial hypertension. You take this medicine 30 minutes before intercourse so that you can have sexual intercourse with your partner. The effect of this medicine lasts for 6 hours so take this medicine only once in 24 hours. You can also take this medicine before or after a meal. Take this medicine as advised by your doctor.