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That’sa Fountain of Youth: Bronx Scientists Engineer Treatment ...New York Observer, NY - Jul 25, 2006... of profit, and in part because the extant drugs (including Levitra and Cialis) are not ... More recently, reports of blindness in as many as 50 Viagra-takers ...

$1.4 Million Grant Helps Professor See The LightMedical News Today (press release), UK - Jul 19, 2006... in the visual pathway can cause vision loss or total blindness, or how to ... Viagra and similar drugs (Levitra, Cialis) work by inhibiting PDE5, but most of these ...