Rated Levitra for Sexual / Libido enhancement Report. Wow! A life changer. I am 54 and began having dificulties keeping an erection a several years ago, not. There are many oral therapies for erectile dysfunction, but the only approved Structurally vardenafil (Levitra) is similar to sildenafil, while tadalafil (Cialis) is. In studies that also included the third major erection drug, Levitra (vardenafil) Drug-fueled erections can be on the soft side, so many men feel.