What’s the most significant difference between levitra vs. cialis?

They both work the same way. The makers of Cialis claim that their product will last longer (up to 36 hours). Levitra is supposed to only last 5 hours. Other than that they act the same way but one may work better for certain people – that why Dr’s give patients trial packs with 2 each of Viagra, Levitra and Cialis. They are not aphrodisiacs, but require arousal to work.