fildena 100 tablet contain an active ingredient called sildenafil citrate. This drug is used to treat erectile dysfunction in men. The effect of this drug lasts for 4 to 6 hours. If the effect of this medicine lasts for more than 4 hours, consult a doctor immediately. Only men can use fildena tablet. Women cannot take advantage of this drug. Seek medical advice before increasing or decreasing the dose of this medicine.