Sexual relation is an important factor in everyone’s life. Some men have no erection problems which helps them to stay longer in bed while some men face erection problems. The disorder wherein a man losses the ability to have an erection is called erectile dysfunction. This disorder occurs because of physical and physiological factors. The lack of blood flow towards the penis makes the erection problem cause. As a remedy to treat this disorder men buy generic viagra online . Sildenafil citrate is the key ingredient in this medication which helps to treat erection problems. This medication belongs to the PDE5 inhibitors group. Generic Viagra is a blue color pill that starts its work by acting on the brain . The brain sends a message to the penis which in turn releases nitric oxide. This nitric oxide is responsible to stimulate the cGMP enzymes. This enzyme makes the blood flow in every part of the body as well as in the penis. As the blood flows in the penis it...