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Activity of a non-hallucinogenic ergoline derivative, lisuride, in an animal behavior model for hallucinogens

Abstract

The behavioral effects of IP administration of lisuride, a non-hallucinogenic iso-lysergic acid amide analog structurally related to d-lysergic acid diethylamide (LSD), were examined in 15 cats. Ten animals were given saline or 6.25, 12.5, 25, 50, or 100 μg/kg of lisuride and observed for 1 h by a rater blind to dose. There was a statistically significant effect of lisuride dose on the frequency of occurrence of the behaviors limb flicking, grooming, and abortive grooming. A time-course study with five cats at the most effective lisuride dose, 50 μg/kg, revealed that the frequencies of occurrence of these behaviors reached a maximum during the first 2 h post dose, and were comparable to frequencies after saline by 6 h post dose. An acute tolerance study with four cats scored for 90 min post dose revealed no significant tolerance to a 50 μg/kg lisuride test dose administered 6, 24, or 72 h after an initial 50 μg/kg dose. Acute cross tolerance studies with four cats scored for 90 min after an initial dose of 50 μg/kg of LSD or of lisuride, followed 24 h later by 50 μg/kg of lisuride or LSD, revealed no significant cross tolerance. The potency of lisuride relative to LSD was evaluated in six cats that were scored for 60 min following 25 and 50 μg/kg of LSD and of lisuride. On a molar basis, scores after lisuride were 51% and 67% those after LSD for limb flicking and grooming. These results indicate that lisuride, a non-hallucinogenic iso-lysergic acid derivative, is a false positive in the animal behavior model for hallucinogens.

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Author information Author notes
  1. Michael E. Trulson

    Present address: Department of Psychology, University of Texas at Dallas, P. O. Box 688, 75080, Richardson, Texas, USA

Authors and Affiliations
  1. Department of Psychiatry, Yale University School of Medicine and Connecticut Mental Health Center, 34 Park Street, 06508, New Haven, Connecticut, USA

    James L. Marini & Michael H. Sheard

  2. Program in Neurosciences, Department of Psychology, Princeton University, 08544, Princeton, New Jersey, USA

    Barry L. Jacobs & Michael E. Trulson

Authors
  1. James L. Marini
  2. Barry L. Jacobs
  3. Michael H. Sheard
  4. Michael E. Trulson
About this article Cite this article

Marini, J.L., Jacobs, B.L., Sheard, M.H. et al. Activity of a non-hallucinogenic ergoline derivative, lisuride, in an animal behavior model for hallucinogens. Psychopharmacology 73, 328–331 (1981). https://doi.org/10.1007/BF00426460

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