Generic Viagra is a legendary product that was launched in 1998. Since then, it has been broken records of sales and it has won public acceptance. Of course, all this fame has a real background. First, Generic Viagra was designed by a big and reliable pharmaceutical company that always performs important researches before releasing a product. Secondly, it is necessary to explain how Generic Viagra works because its mechanism of action makes it get better results. It works by increasing blood flow to the penis and this causes that penis has enough blood to get erected. You should have on your mind how Generic Viagra works because this product was proven to work as fast as 14 minutes in some men and its effect may last up to 4 hours. Discuss with your doctor how this drug works in order to be aware of all the details about the product you will use to improve your erections.