Male impotence or erectile dysfunction is a devastating condition that affects millions of men all over the world. They may seek a wide variety of treatment options to overcome the problem and help them achieve or maintain an erection. Viagra has always remained a popular choice and was traditionally available by prescription only. Fortunately, non prescription Viagra is also available. You can order this drug online and pay less than at a traditional pharmacy. The drug is very safe and works well with effects lasting as long as 4 hours. Non prescription Viagra works to increase erections by increasing the blood flow to the penile region.