Fildena 100 is a treatment option for male impotence and erectile dysfunction. One of the ingredients in this drug, tadalafil, helps to increase blood flow to men's penile tissue. Half an hour before engaging in sexual activity, take this medication. This medicine can be taken with or without food. This medication should be taken with water; do not chew or crush it. This medication's effectiveness will be decreased if you take it with cold or fatty foods. Take this medication exactly as directed by your doctor.