Men with erectile dysfunction can be treated with the medication fildena 100. Sildenafil citrate is a component in this medication. This medication is used to improve panel blood flow. You can take this medication any way—before or after food. This medication can be taken with water. This medication should not be chewed. Allocate half an hour in advance to relish the company of your significant other. This medication takes four to five hours to take effect. For women and children, do not use this medication. You can take this medication as your physician has prescribed.