Learn about the health risks, safety information and side effects of taking LEVITRA.
乐威壮levitrai,了解健康风险,安全信息和副作用的血管扩张药。
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The research was funded by Pfizer Inc, known generically as tadalafil, and Levitra or vardenafil, sold by GlaxoSmithKline, Bayer ag and Schering-Plough, work in a similar way to Viagra.