Fildena 50 is a prescription medicine used to treat erectile dysfunction (ED) or impotence in males. It works by increasing blood flow to the male's private area. This drug improves sexual performance by increasing your sexual desire.  Take this medicine one hour before the sexual plan. This medicine helps you enjoy sex for 4 to 5 hours. It can be taken with or without food but it is better if taken on an empty stomach. Do not take alcohol or heavy food after taking this pill.