Viagra 200 mg is the highest dose that is used for the treatment of Erectile Dysfunction (ED). It is used in cases where the lower dosages fail to work properly. Also known as the blue pill, it increases the blood flow to the penis, thereby giving a hard erection. An erection is known to last for a period of 4-5 hours. For best results, take the pill on an empty stomach with water. Do not consume more than one pill in 24 hours. Take it exactly one hour before any sexual activity. Follow your doctor’s prescription carefully and make the most out of your sexual sessions.