Cialis Is #1, Not Viagra Since its 1998 introduction, Viagra (sildenafil) has become one of the world’s most recognizable brand names, up there with Coca-Cola and Rolls Royce. But in terms of user satisfaction, Viagra runs…
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Cialis Is #1, Not Viagra Since its 1998 introduction, Viagra (sildenafil) has become one of the world’s most recognizable brand names, up there with Coca-Cola and Rolls Royce. But in terms of user satisfaction, Viagra runs…