Erectile dysfunction is the name given to the inability to achieve or maintain an erection during sexual arousal or intercourse. This is caused by a lack of sustained blood flow to the muscle tissue of the penis during arousal. Erectile dysfunction affects men of all ages, though as men grow older the chances of erectile dysfunction occurring increase; men in their sixties are four times more likely to be affected than men in their forties. It is not uncommon for men who suffer from erectile dysfunction regularly to have a Viagra prescription or to buy sildenafil online.
The factors that contribute to an erection range from the physical such as manual stimulation of the penis shaft, to the psychological and hormonal. This means that there are a wide range of reasons for erectile dysfunction some of which may not be easily diagnosed. This means that it can affect men of all ages and not always for obvious reasons, which can be embarrassing and sometimes uncomfortable. A Viagra prescription ensures that men suffering with erectile dysfunction can achieve lasting erections throughout intercourse.
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Viagra is the most commonly known treatment for erectile dysfunction. It is often referred to as the blue pill online. Viagra is the product name for the chemical sildenafil citrate which is a PDE5 inhibitor. PDE5 is an enzyme that occurs naturally in the human body. This enzyme causes the muscle tissue of the penis to constrict, thereby reducing blood flow. Viagra as a PDE5 inhibitor averts this constricting, causing the muscle tissue to relax which increases blood flow, which lead to an erection. This relaxation, or vasodilation, as a consequence of PDE5 being inhibited, is the reason that Viagra is sometimes used to treat high blood pressure. Viagra will only be effective is the person taking it is aroused or stimulated sexually. This is because the PDE5 chemicals which Viagra acts on only occur during sexual arousal. Men buy Viagra prescription medication to help improve their sex lives.
Viagra comes as a blue pill which is taken orally anywhere from half an hour before intercourse. It usually takes around have an hour for the dug to take effect and erections achieved as a result of taking Viagra usually last about two hours though can last up to four. Viagra ensures that an erection can be maintained during and throughout intercourse. Viagra prescriptions are available from a doctor or pharmacist; there may be associated risks with other medications or existing conditions which can be discussed with a doctor or health professional.