Fildena 50 is a drug prescribed to treat male impotence and erectile dysfunction. Erectile dysfunction is a male sexual well-being concern defined by the lack of ability to obtain or maintain an erection during sex-related intercourse. A physical or mental condition can cause impotence. The recommended dose is one per day, with or without meals. Do not crush or chew the medication before ingesting it with water. It is advisable to take medicine one hour before indulging in sex.