|
Herbal viagra is a name that can be given to any herbal product advertised as treating erectile dysfunction. The name "herbal viagra" is taken from the brand name Viagra, under which drug company Pfizer sells sildenafil citrate, a drug that is used to treat erectile dysfunction. Viagra has become a generic term for many people discussing drugs designed to treat erectile dysfunction, even those without sildenafil. There are many different products advertised as herbal viagra, but with varying ingredients. The most popular herbs are epimedium (horny goat weed), damiana, ginseng, ginkgo, yohimbe, saw palmetto, maca, ''Muira puama'', and ''Tribulus terrestris''. There are no clinical trials or scientific studies that support the effectiveness of any of these ingredients for the treatment of erectile dysfunction and some products are known to also contain a "hidden drug ingredient". Since there is a huge market for male impotency, researchers have always been looking for alternatives to this chemical drug that is not only cheaper but also without any harmful side effects. This is the reason that herbal Viagra has become so popular over the past few years. Herbal Viagra has successfully treated importance in a number of cases. Herbal viagras, contrary to what the name suggests, do not normally contain sildenafil citrate. However, synthetic chemical compounds similar to sildenafil have been found as adulterants in many supplements which are sold as herbal viagra or "natural" sexual enhancement products.〔(Enforcement Report for June 30, 2010 ), United States Food and Drug Administration〕 The United States Food and Drug Administration has warned consumers that any sexual enhancement product that claims to work as well as prescription products is likely to contain such a contaminant.〔(Hidden Risks of Erectile Dysfunction "Treatments" Sold Online ), United States Food and Drug Administration, February 21, 2009〕 Scientists estimated that >60% of the consumed sildenafil in the Netherlands is from illegal sources such as adulterated dietary supplements. Herbal viagras often carry a number of dangerous side effects. Primarily, they cause abnormally low blood pressure and can restrict blood flow to vital organs. There is also evidence to suggest some preparations may be toxic if taken in larger doses.〔 Additional side effects and dangers of common herbal viagra adulterants, such as sulfoaildenafil, acetildenafil and other analogs, are unknown because these ingredients have not had thorough review in human clinical trials. Herbal viagra is predominantly sold through the internet, and in 2003 approximately 4% or 1 in 25 of all e-mail messages sent offered herbal viagra, genuine pharmaceuticals, and other herbal remedies.〔(【引用サイトリンク】title=Spam growth increases during March )〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Herbal viagra」の詳細全文を読む スポンサード リンク
|