Which works best: Viagra, Cialis, Levitra?

All three of the leading PDE5 inhibitors have very similar chemical makeup, and all work in essentially the same way. However, given the slight variation from one drug to another, any given ED patient may find he prefers one of the drugs over the others. Thus, it’s a matter of personal preference, making it impossible to flatly declare one of these drugs superior to the others.

That said, there is one significant difference between Cialis for Use as Needed, one of two Cialis formulations, and the other two impotence drugs. While it doesn’t make this Cialis formulation work any differently than its two rivals, it contains more of the active ingredient and thus is effective for a longer period of time. If you’re planning a romantic weekend with your significant other, you might want to consider this longer-lasting Cialis, which has been shown to be effective for up to 36 hours. Not surprisingly, you’ll pay more for this type of Cialis than for either Viagra or Levitra, each of which is effective for four to six hours at the most.