hub.alfresco.com/t5/abuse/official-vardenafil-20mg-online-convenient-and-secure-way-to-ed/td-p/326122; Opens a new tab·Vardenafil 20mg contains vardenafil, a phosphodiesterase type 5 (PDE5) inhibitor that is used to treat erectile dysfunction in men (impotence). During sexual stimulation, nitric oxide is released in the erectile tissue of the penis (corpus cavernosum), and activates the enzyme guanylate cyclase.