fildena 100mg tablets contain an active ingredient called sildenafil citrate. This drug is used to treat oral erectile dysfunction. The effect of this drug lasts for 4 to 6 hours. If the effect of fildena tablet lasts for more than 6 hours, consult a doctor immediately. Only men can use this drug. Consult a doctor before using this medicine. This medicine can be taken with or without food. Take it orally with water. Do not take this medicine daily.