Their probably isn't a man on the planet that doesn't know what Viagra is. If this sounds like something that happens to you, the first thing you must do is to take comfort in is the fact that you are not alone. Under normal circumstances, when a man becomes sexually aroused or 'gets turned on', a substance called Nitric Oxide (NO) is released in an area of the Penis called the Corpus Cavernosum to relax and allow blood to flow into the Penis. Such is the popularity and apparent efficacy of the drug that 9 tablets are dispensed every second worldwide and over 600,000 doctors recommend Viagra for the treatment of ED. Very often it's another medical condition, possibly one you don't even know you have, that is causing ED. Not until the latter half of the 20th century have men shown such a huge interest in maintaining their youthful vigour through diet, exercise, skin care and even plastic surgery. Impotence is more common than you think. Then we'll take a look at the possible causes of ED and various self-help treatments that may negate your need to use the drug in the first place. Whilst for some it is just an occasion inconvenience,

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