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Offline abejoye

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Viagra-what is it and how does it work
« on: May 10, 2012, 05:25:12 AM »
Viagra is an approved drug for erectile dysfunction developed by Pfizer Inc a major pharmaceutical company. The active ingredient in Viagra is a chemical called Sildenafil citrate.

How it works is quite simple!

As with most drugs it blocks the function of certain enzymes which affect various physiological processes. In the case of Viagra the enzyme that it blocks is called phosphodiesterase type 5 (PDE5).

This enzyme PDE5 is the enzyme responsible for the degradation of cGMP which is created through the action of nitric oxide. Refer to the section above on 'the physiology of an erection' for more info.

Here is an alternate explanation:

Production of Nitric oxide is initiated by sexual stimulation. The nitric oxide creates an enzyme which then creates cGMP which in turn opens up the blood pathways with the end result being an erection.

At the same time that this is happening another enzyme is offsetting the enzyme that creates the cGMP. If this was not the case then men would end up with a permanent erection... uncomfortable and embarrassing!

However, if you block the enzyme (PDE5) which degrades the nitric oxide it becomes possible to achieve an erection which was not possible whilst it was working OK. In other words to make one part work you have to stop the other part from working properly.

This is how Viagra works. As stated earlier it works for 7 out of 10 men.

Unfortunately there are known side effects.

It DOES NOT address the issue of libido or sexual desire so men using this solution lack the stimulation of their neurotransmitters so important in the enjoyment of sex.

Linkback: http://naijasky.com/man-health/1723/viagra-what-is-it-and-how-does-it-work/1204/

NaijaSky

Viagra-what is it and how does it work
« on: May 10, 2012, 05:25:12 AM »


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