Compare Viagra Cialis Levitra
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When it comes to a Viagra Cialis Levitra comparison, there is much to be said about each product, and their active ingredients, Sildenafil Citrate, Tadalafil and Vardenafil, respectively. For starters, the three of them are PDE inhibitors. PDE5 is an enzyme that helps to regulate blood flow in and out of the penis, but which in excess leads to a blockade of the blood vessels in the penile region. PDE5 inhibitors break down this enzyme, leading to an improvement in circulation, meaning that the male sexual organ will receive enough blood during arousal to produce and sustain an erection.
However, when you compare Viagra Cialis Levitra you can find certain key differences. For example, both Viagra and Levitra take a similar amount of time to become active, but once they do, the former's effect may last up to four hours, while the latter's can last up to five hours. Cialis, on the other hand, may start working in even less time, and it certainly outlasts both its competitors' duration of action, thanks to its longer half life that allows it to remain active for more than 30 hours in some instances.
While all of these drugs provide basically the same results, it is not likely that one will be successful where other was not. Nevertheless, there are circumstances in which you may benefit more from resorting to one rather than the other. For instance, if you were allergic to Sildenafil Citrate, you could probably still use either Tadalafil or Vardenafil. This should however be discussed with your local doctor, who will undoubtedly be of much help in your Viagra Cialis Levitra comparison.