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How does Viagra work?

Viagra is a pill that treats erectile dysfunction. It does not increase sexual desire or cure erectile dysfunction, but it does help men to have and maintain erections.

Having an erection is a complex process involving the activation of chemicals within the penis. These chemicals relax the muscles in the penis, which increases blood flow. This creates pressure and causes the penis to become hard. In men with erectile dysfunction, this process is interrupted and blood flow is restricted. This stops the penis from becoming or staying erect. Viagra can help to prevent this.

The active ingredient in Viagra is sildenafil. Sildenafil is a PDE5-inhibitor, meaning that it inhibits the phosphodiesterase type 5 enzyme. When this enzyme works too quickly, it breaks down the chemicals that cause the muscles in the penis to relax. This limits the amount of blood that can flow to the penis. By blocking this enzyme, sildenafil relaxes the muscles and blood vessels, increasing blood flow to the penis. It also boosts the naturally occurring chemical nitric oxide, which helps to increase blood flow as well.

Viagra will not cause you to be sexually aroused; sexual stimulation is required for the drug to work. With stimulation, Viagra improves the ability to get and maintain erections during sexual intercourse. This can lead to longer and firmer erections, and improve overall sexual satisfaction. In addition to the main physical function of Viagra, it can also help to alleviate the mental stress and anxiety that erectile dysfunction causes in some men.

Viagra can be effective in as little as 30 minutes, but it stays in the bloodstream for up to four hours. After sexual intercourse has finished, the erection should go away. In the rare event of an erection lasting more than four hours, you should seek immediate medical help. Visit our Viagra side effects page more information on the side effects of Viagra and how they may affect you.

Viagra is the most well-known erectile dysfunction treatment available. It is effective, easy to take, and medically proven to work.

*The medical sources used for this article can be viewed on our legal page.

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