History of Viagra

Viagra is the brand name of Sildenafil citrate derived from Sildenafil compound UK-92,480. This formulation was created at the Pharmaceutical Major Pfizer's research center at Kent in England and clinical tests were conducted at Morrison hospital in Swansea. It was patented in 1996 under brand name Viagra by Pfizer and introduced in the market in the year 1998. Since its introduction, Viagra has become the first oral prescription treatment available to treat erectile dysfunction and is expected to cross one billion in US market alone. Sildenafil citrate is also available under other brand names as Revatio.

Sildenafil was basically being examined as an option for treatment of high blood pressure and angina. However the clinical test results showed that the drug could induce and improve erectile dysfunction and thus was born the Viagra as a treatment option.

Sildenafil citrate is available under the brand name of Viagra. You can buy Viagra Australia online no prescription now to regain your manhood and indulge in physical pleasures with your partner.

Viagra has competition in the market from other treatment options namely Levitra and Cialis. In recent times market is flooded with various alternate therapies and options staking the same claim as Viagra.

How does Viagra Work

Viagra works as a PDE5 Inhibitor and works to protect CGMP from destruction by PDE5 in the corpus cayrnosum. Viagra’s molecular structure is similar to CGMP and hence as a binding agent to restrict PDE5. The resultant increase of CGMP causes the muscle relaxation in the penis leading to increased blood flow and erectile functioning of penis.

However it should be noted that Viagra drug itself does not cause or cure an erectile function directly or independently, but aids in response to sexual stimulation.