While men are the best pills to solve the problem of erectile dysfunction. These tablets are a drug used by men. Fildena drug is mainly taken 1 hour before intercourse. The effect lasts for 4-5 hours after taking. Sildenafil acts as the active ingredient in the drug Fildena. Fildena should be kept away from small children and pets. It is advisable to consult a doctor before taking Fildena.