HYOSCYAMIN
\hˈa͡ɪəsɪˌamɪn], \hˈaɪəsɪˌamɪn], \h_ˈaɪ_ə_s_ɪ__ˌa_m_ɪ_n]\
Definitions of HYOSCYAMIN
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Alkaloid like atropin, from hyoscyamus.
By Willam Alexander Newman Dorland
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A crystallin alkaloid, (C17H23NO3), a levorotary stereo-isomere of atropin, obtained from various solanaceous plants and in various degrees of purity as found in the shops, or sometimes in the amorphous form. Pure levorotary hyoscyamin acts twice as strongly as atropin on nerve endings, but with the same strength on the central nervous system of mammals. In addition to the difficulty of obtaining pure hyoscyamin, it has the disadvantage of being converted very readily into atropin. Dextrorotary h. is also known.
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Of the eclectics, a concentration obtained from Hyoscyamus niger.
By Smith Ely Jelliffe
