New Viagra online
Sildenafil (Viagra) is the first effective oral therapy used in the treatment of erectile dysfunction. It is produced by Pfizer (Pfizer US Pharmaceutical Group, New York, NY) and was approved by the FDA in 1998. It is considered to be the first-line therapy for the treatment of erectile dysfunction in men who have no contraindications to its use. Unlike the therapies that were available before the FDA approved Viagra, simply taking the "little blue pill" does not produce an erection. To understand this, it is first important to review the processes involved in the normal erection. When aroused or stimulated, the brain sends out messages that result in an increase in the release of nitric oxide from the nerves in the pelvis.