The Fildena double 200 medication is used to treat erectile dysfunction and impotence in males. Sildenafil, an ingredient in this medication, aids in boosting blood flow to a man's penis tissues. As prescribed by your physician, you should take this medication. This medication can be taken either before or after food. Consume this medication with water; do not crush or chew the tablet. Don't take this medication with cold beverages or fatty meals. This medication takes 6 hours to take effect.