Generic Viagra which is also known as sildenafil citrate is a generic, non-branded treatment for erectile dysfunction (ED) or impotence issues in men.
‘Viagra’ is known as the brand name of the popular impotence treatment that was first released by Pfizer. Pfizer introduced the medicine Viagra to the world in 1999. They were granted a license, which is known as a patent, which gave them exclusive rights to be the only company that is well allowed for using sildenafil citrate as a treatment for impotence issues in men. Once the patent on Viagra expired, which is a generic version could be produced and sold by manufacturers at lower rates.
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