The inability to get or keep an erection during sexual activity is the hallmark of erectile dysfunction, a problem affecting male sexual health. A medicine called Fildena 100 is used to treat erectile dysfunction, or male impotence (ED). Fildena improves firmness by increasing blood flow to the penile area. It is recommended that you take Fildena 100 mg one hour before engaging in sexual activity. If necessary, your doctor may change the medicine. Should you overdose, get in touch with your doctor right away.