Levitra is the brand-name for vardenafil, a new tablet-based oral treatment for erectile dysfunction (ED), which is
licensed for prescription in the UK and other countries. Levitra has proved highly successful in clinical trials and is
generating major interest as a real alternative to Viagra, Uprima and Cialis. Levitra is a new oral PDE-5 inhibitor for
the treatment of male erectile dysfunction (ED). Phosphodiesterase type 5 (PDE-%) is the predominate enzyme found in human
penile erectile tissue and is associated with erections. PDE-5 inhibitors such as Levitra typically work by blocking this
enzyme to enhance or prolong the erectile process. Levitra is marketed by the leading pharmaceutical companies Bayer and
GlaxoSmithKline, through a worldwide co-promotion and co-development agreement.