An alkaloid found in hyoscyamus, belladonna, duboisine, and stramonium; the levorotatory component of the racemic mixture, atropine; used as an antispasmodic, analgesic, and sedative; h. hydrobromide is used for the same purposes. SYN: daturine.
- h. sulfate an antispasmodic, hypnotic, and sedative, also used in parkinsonism to relieve tremor, rigidity, and excessive salivation.

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hyo·scy·a·mine .hī-ə-'sī-ə-mēn n a poisonous crystalline alkaloid C17H23NO3 of which atropine is a racemic mixture esp its levorotatory form found esp. in the plants belladonna and henbane and used similarly to atropine

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hyo·scy·amine (hi″o-siґə-mēn) [USP] an anticholinergic and antimuscarinic alkaloid derived from Hyoscyamus niger, Atropa belladonna, and other solanaceous plants. It is the levorotatory component of racemic atropine; since the dextrorotatory component has little activity, hyoscyamine has approximately twice the potency of atropine. It is used primarily as an antispasmodic for gastrointestinal or urinary tract disorders; administered orally.

Medical dictionary. 2011.

Look at other dictionaries:

  • Hyoscyamine — Systematic (IUPAC) name (8 methyl 8 az …   Wikipedia

  • Hyoscyamine — Structure de l hyoscyamine Général Nom IUPAC 3 hydroxy 2 phénylpropanoate de 8 méthyl 8 azabicyclo[3.2.1]oct 3 yle …   Wikipédia en Français

  • hyoscyamine — ● hyoscyamine nom féminin (bas latin hyosciamus, du grec huoskuamos, fève de porc) Alcaloïde des solanacées, isomère lévogyre de l atropine, plus actif et moins toxique que celle ci. hyoscyamine [josjamin] n. f. ÉTYM. XIXe; lat. hyoscyamus «… …   Encyclopédie Universelle

  • Hyoscyamine — Hy os*cy a*mine, n. [See {Hyoscyamus}.] (Chem.) An alkaloid found in henbane ({Hyoscyamus niger}), and regarded as its active principle. It is also found with other alkaloids in the thorn apple and deadly nightshade. It is extracted as a white… …   The Collaborative International Dictionary of English

  • hyoscyamine — [hī΄ə sī′ə mēn΄, hī΄ə sī′əmin] n. [< L hyoscyamus, henbane ( < Gr hyoskyamos < hys, pig (see HYENA) + kyamos, bean) + INE3] a colorless, crystalline, very poisonous alkaloid, C17H23NO3, obtained from henbane and other plants of the… …   English World dictionary

  • hyoscyamine — noun Etymology: German Hyoscyamin, from New Latin Hyoscyamus, genus of herbs, from Latin, henbane, from Greek hyoskyamos, literally, swine s bean, from hyos (genitive of hys swine) + kyamos bean more at sow Date: 1858 a poisonous crystalline… …   New Collegiate Dictionary

  • hyoscyamine — Anticholinergic from Atropa belladona ; when racemized following isolation is known as atropine …   Dictionary of molecular biology

  • hyoscyamine — /huy euh suy euh meen , min/, n. Pharm. a poisonous alkaloid, C17H23NO3, obtained from henbane and other solanaceous plants, used as a sedative, analgesic, mydriatic, and antispasmodic. [1855 60; HYOSCYAM(US) + INE2] * * * …   Universalium

  • hyoscyamine — noun an alkaloid, the stereoisomer of atropine, used medicinally to treat abdominal pain and similar conditions …   Wiktionary

  • hyoscyamine — (i o ssi a mi n ) s. f. Terme de chimie. Substance découverte dans les semences de la jusquiame (hyoscyamus niger, L.). ÉTYMOLOGIE    Lat. hyoscyamus (voy. jusquiame) …   Dictionnaire de la Langue Française d'Émile Littré

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