Viagra is the brand name of Sildenafil, a well-established medication used to aid men with Erectile Dysfunction (ED). It can also be prescribed to treat pulmonary arterial hypertension (high blood pressure that affects the lungs and heart).

How Does Viagra Work?

An erection is caused when blood flows to the penis after stimulation. In those who suffer from ED, the nerves in the penis prevent blood from flowing properly. Viagra’s active ingredient Sildenafil Citrate helps relax the muscles of the penis. This allows blood to flow more easily, thereby assisting men in successfully achieving erections.

Within 30 to 60 minutes of taking it, the effects of Viagra should begin working. Note that sexual stimulation is required as the pill does not cause erections on its own. Depending on the dosage, Viagra’s effects generally last 2 to 3 hours, but it can stay in the body’s system for up to 5 hours, meaning that it is possible to get an erection multiple times with one dose. However, no studies have shown that taking it can help those erections last longer.

Post-Coital Effects of Viagra

Even for those who do not have Erectile Dysfunction, getting another erection immediately after sex may not be possible due to the body’s physical limitations. The time between ejaculation and being able to become sexually aroused again is called the Refractory Period. It is different for everyone, but it can last anywhere from a few minutes to a few hours or days.

While Viagra cannot prevent the Refractory Period, studies have shown that one of the post-coital effects of Viagra tablets is a decrease in recovery time. Given Viagra can stay in a user’s system for several hours and has been shown to decrease the Refractory Period, it is therefore possible to achieve multiple erections with one dose.

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