Fildena Double 200 mg is a high-dose medication used to treat erectile dysfunction (ED). It contains Sildenafil Citrate as its active ingredient, which is the same compound found in Viagra. Sildenafil works by increasing blood flow to the penis, helping men with ED achieve and maintain an erection during sexual arousal. After taking Fildena Double 200 mg, you can typically expect the effects to last for 4 to 6 hours. However, this may vary depending on the individual, and the medication works best when there's sexual arousal. It does not cause an erection without sexual stimulation.