Medicines

How does Viagra work exactly?

Viagra ensures that blood can flow through the veins into the penis.

Many men have erectile dysfunction because the blood vessels in the penis are narrowed and the blood has no free passage. Viagra increases the level of the signal substance cGMP in the blood, so that the vessels relax and the blood can flow into the penis.

The blood vessels those that run to the penis are narrowed, so that the penis contains little blood and is limp.

With sexual arousal the brain makes the substance cGMP, which makes the blood vessels relax. In impotent men, the enzyme PDE5 breaks down the substance.

Viagra blocks PDE5 so that cGMP can do its job. The muscles of the blood vessels relax, the blood vessels expand and the penis becomes stiff.

An overview of the size of the penis of all men in the world.

Video: How Does Viagra Work? (February 2020).

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