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A strongly emetic active principle obtained from several species of Andromeda and Rhododendron (family Ericaceae); it is a cardiac poison, first stimulating and then paralyzing the vagus; it also paralyzes the motor nerve ends in striated muscle.
Farlex Partner Medical Dictionary © Farlex 2012
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In both episodes there is evidence of mental derangement, which Forbes suggests was caused by andromedotoxin, present in the flowers of the local rhododendron plant.