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Viagra

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  • Pfizer says it will sell Viagra on its website

    it's virtually impossible to distinguish fakes from real Viagra."The vast majority of patients do believe that they're getting Viagra," said Vic Cavelli, head of marketing for primary care medicines at Pfizer, which plans to have drugstore chain CVS Caremark   Read more »

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About Viagra

Sildenafil citrate, sold as Viagra, Revatio and under various other trade names, is a drug used to treat erectile dysfunction and pulmonary arterial hypertension (PAH). It was developed and is being marketed by the pharmaceutical company Pfizer. It acts by inhibiting cGMP specific phosphodiesterase type 5, an enzyme that regulates blood flow in the penis. Since becoming available in 1998, sildenafil has been the prime treatment for erectile dysfunction; its primary competitors on the market are tadalafil (Cialis) and vardenafil (Levitra).

from Wikipedia

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