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Technically, Cialis, Levitra, and Viagra are fundamentally the same. They do the same job of allowing a man to get an erection that would otherwise not have been able to enjoy one. Although, there are some differences in the way that the three of these work. Levitra works a little longer than Viagra. They both work in about 30 minutes. With Levitra, the effects last for about 5 hours. With Viagra, the effects last approximately 4 hours. On the other hand, Cialis starts working in as little as 15 minutes and it lasts for up to 36 hours. Impressive!

Many want to know if they have tried one of the ED drugs and found that it really didn't work for them if they should try a different one. The answer is yes but since the drugs work in the same manner, the others likely will not work either. Many of us can't remember the days when there was no effective treatment in a pill form for the problem that plagues so many American men. Five years after Viagra revolutionized male sexuality; it was one of three pills for erectile dysfunction. Call them Viagra, Levitra, and Cialis and they sound like entirely different medications but they have many more similarities than differences.

The three drugs share a common enzyme called phosphodiesterase-5 (PDE-5). For that to make much sense to you, you would have to understand the technical terms of how a penis becomes erect. A receptive mind + adequate levels of testosterone + healthy arteries, veins, and nerves + nitric oxide = an erection. The job of the nitric oxide is to signal the arterial cells to produce cyclic guanosine monophosphate which is responsible for increasing the flow of blood to the penis.

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