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Viagra tablets are a pharmacological group of drugs used to phenergan. treat erectile dysfunction in men. The drug does not affect erectile dysfunction of mental central origin.

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To understand the mechanism of action of Viagra, you need to understand the physiology of erection. The bangladeshi sex. first condition is sexual stimulation, which potentiates the release of NO molecules (nitric oxide) in the cavernous bodies of the penis. After this, the muscle relaxes, which restrains blood flow to the cavernous bodies, and the desired erection comes. Viagra alone does not affect the tone of the muscular tissue of the cavernous bodies, its action is much more delicate and selective: the drug suppresses the activity of PDE5 (the enzyme responsible for the disintegration of the energy substrate in the cavernous bodies of the penis), so that NO is more able to influence relaxation muscles. The uniqueness of Viagra is that it blocks mostly only PDE5, only slightly affecting the other PDEs (and there are quite a few of them). Otherwise, Viagra would not save from sexual impotence, and was the most real nerve agent.

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