The erectile dysfunction medicine Fildena Double 200 increases blood flow to the erection-producing areas of the male reproductive system. The Sildenafil Citrate dosage for Fildena Double 200 is 200 milligrams. The primary ingredient in Fildena, Sildenafil Citrate, improves blood flow to the penis, allowing the patient to achieve and maintain a more robust erection for a longer period of time. The average duration of an erection is 4-5 hours. It is not recommended to take Fildena Double 200 on an empty stomach. First-time users of Fildena often get a prescription for either 50 or 100 mg. The typical dosage of Fildena Double 200 for healthy males is one tablet once day. While adverse effects from using Fildena Double 200mg are uncommon, they might include lightheadedness, nausea, and even temporary blindness. If the medicine is stopped suddenly, the patient may recover to normal. If you have any serious adverse effects, please let your doctor know.