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Terpin hydrate is an expectorant, commonly used to loosen mucus in patients presenting with acute or chronic bronchitis, and related conditions. It is derived from sources such as oil of turpentine, oregano, thyme and eucalyptus. Though it was quite popular in the USA since the late nineteenth century, it was banned by the U.S. Food and Drug Administration (FDA) in the 1990s due to lack of proof of efficacy.〔United States Food and Drug Administration: (Code of Federal Regulations, Title 21, Volume 5, April 1, 2009 )〕 ==History== Terpin hydrate was first physiologically investigated by Lepine in 1855. He reported that it acted upon the mucous membranes and also the nervous system in a manner similar to the oil of turpentine.〔Drug Store Museum: (Terpin Hydrate )〕 The following preparations of Terpin hydrate were available in the USA in 1907 (Taken from The Dispensatory Of The United States Of America. Nineteenth Edition. By Dr. Geo. B.Wood And Dr. Franklin Bache. Based Upon The Eighth Decennial Revision Of The United States Pharmacopoeia Issued June 1, 1907):〔 * Elixir of Terpin Hydrate * Elixir of Terpin Hydrate with Codeine * Elixir of Terpin Hydrate with Heroin 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「Terpin hydrate」の詳細全文を読む スポンサード リンク
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