protoveratrine A and B

protoveratrine A and B
A mixture of two alkaloids isolated from Veratrum album; they exert their main effect upon the cardiovascular system through the carotid sinus receptors and vagal sensory endings in the heart; they cause vasodilation and are thought to bring about a redistribution to all vascular beds and thus to induce a fall in blood pressure; used in certain forms of hypertension; the maleates have the same actions.

Medical dictionary. 2011.

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  • protoveratrine — pro·to·ver·a·trine .prōt ō ver ə .trēn, trən n 1) either of two toxic crystalline alkaloids obtained from hellebores of the genus Veratrum (esp. V. viride of No. America and V. album of Europe) and used in the treatment of hypertension called… …   Medical dictionary

  • protoveratrine — |prōd.(ˌ)ō+ noun Etymology: International Scientific Vocabulary prot + veratrine : a toxic crystalline alkaloid of a mixture of two closely related alkaloids distinguished as protoveratrine A and B obtained from the white hellebore and used in… …   Useful english dictionary

  • cryptenamine acetates, cryptenamine tannates — Acetate or tannate salts of alkaloids from a nonaqueous extract of Veratrum viride, containing the hypotensive alkaloids protoveratrines A and B, germitrine, neogermetrine, germerine, germidine, jervine, rubijervine, isorubijervine, and… …   Medical dictionary

  • hellebore — A plant of the genus Helleborus, especially H. niger (black h.). SEE ALSO: Veratrum album, Veratrum viride. [G. helleboros] false h. SYN: adonis. * * * hel·le·bore hel ə .bō(ə)r, .bȯ(ə)r n 1 a) any herb of the genus Helleborus b) the dried roots …   Medical dictionary

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