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Viagra is the world’s most famous erectile dysfunction treatment chosen by millions because of its safety, efficiency and reputation. It has been specially designed for men suffering from impotence. The problem may lie in their inability to get or maintain an erection for a period long enough to have sex.

SildenafilThis medicine provides the patient with an easy and safe solution. It is supposed to be taken 40-60 minutes before sex, with a full glass of water. Although Viagra is supposed to be taken as needed, at least 24 hours must pass before you can take another dose.

Viagra works by relaxing the smooth muscles in the penis, that way providing for a more powerful and durable erection. However, smooth muscles are also found in other parts of the body, so how come are they not affected by Viagra? To understand this, it’s important to know about the way blood flow works in the body.

The brain can send different signals to different parts of the body, including the penis. When a man gets sexually excited, the signals are sent to specific cells, that way triggering a response and leading to the production of cGMP. CGMP is an enzyme responsible for relaxing the blood vessels in the penis, that way allowing the corpora cavernosa to fill with blood. Viagra actually prevents that enzyme from being decomposed by PDE5 — another enzyme. This is why Viagra is also known as a PDE5 inhibitor.

Viagra comes in three different doses — 25 mg, 50 mg, and 100 mg. Those can be combined together to achieve a larger dose, for example, a 75 mg one. A tablet of Viagra can also be split, because a 100 mg tablet would normally cost cheaper than two 50 mg ones. The usual starting dose is 50 mg, because the 25 mg one may not be efficient for some patients, and the adjustments will need to be made anyway.

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