Fildena 120 is a prescription drug that helps in the treatment of erectile dysfunction in men. This drug works by increasing the blood flow to your penis. This helps in getting or maintaining an erection. Men over 18 years of age should take this drug. This pill works best when taken at least half an hour before sexual activity. The effects of the drug last for 4-6 hours. Take this medicine with water. Do not break or chew it. Do not drink alcohol or eat fatty foods. Take only one dose every 24 hours. Follow your doctor's advice.