Fildena 50 is a drug used to treat erectile dysfunction in men. This drug works by increasing blood flow to the muscles. It is imperative to take this drug 1 hour before planning intercourse. So you can enjoy longer sex with your partner. This drug takes effect in 30 minutes. The effect of this drug lasts for 24 hours. Therefore this medicine should be taken only once a day. It is important to consult a doctor once before taking this medicine.