Fildena CT 100 is a drug used to treat erectile dysfunction and impotence. One of the medication's ingredients, sildenafil, helps to increase blood flow to men's penile tissue. Take this medication an hour before having sex to make sure you enjoy having sex with your partner. Drink water while taking this medication. Don't break or chew the prescription. You can take this medication with or without food. Because of its 6-hour half-life, this medication should not be taken too frequently. Adhere to your doctor's instructions when using this medication.