Men with erectile dysfunction and impotence can be treated with the medication fildena 100 purple pills. The purpose of the component sildenafil citrate in this medication is to improve blood flow to the panels. Only guys who are at least eighteen years old can use this medication. You can take this medication any way—before or after food. Before using this medication, speak with your doctor as overuse may put you at risk for health issues. Avoid taking this medication with cold or fatty foods as they will lessen its effectiveness. You do not need to take this medication regularly because its effects remain for five hours after you take it.