A new generic sildenafil for Revatio will bring up questions about whether it can also be used for Viagra

A new generic sildenafil for Revatio will bring up questions about whether it can also be used for Viagra.

The patent on the CHEMICAL sildenafil expires this year...but the patent on its USE for sexual dysfunction lasts until 2020.

That's why companies can't market a generic for Viagra yet...but they can market a generic for Revatio, which is used for pulmonary hypertension.

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