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Time-dependent interactions between iboga agents and cocaine

I M Maisonneuve1, K E Visker, G L Mann

  • 1Department of Pharmacology and Neuroscience, Albany Medical College, NY 12208, USA. maison@ccgateway.amc.edu

European Journal of Pharmacology
|January 24, 1998
PubMed
Summary
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Iboga agents, including ibogaine, noribogaine, and 18-methoxycoronaridine, show dual effects on cocaine-induced hyperactivity in rats. These compounds acutely inhibit but later potentiate cocaine

Area of Science:

  • Neuroscience
  • Pharmacology
  • Psychopharmacology

Background:

  • Cocaine-induced hyperactivity is a complex phenomenon.
  • Previous research on ibogaine's effects on cocaine-induced activity has yielded conflicting results, reporting both inhibition and enhancement.
  • Understanding these interactions is crucial for potential therapeutic applications.

Purpose of the Study:

  • To investigate the time-dependent effects of iboga agents on cocaine-induced hyperactivity in a rat model.
  • To clarify the divergent findings in the existing literature regarding ibogaine's influence on cocaine's behavioral effects.

Main Methods:

  • Rats were administered ibogaine, noribogaine, or 18-methoxycoronaridine (40 mg/kg, i.p.) or saline at 1 or 19 hours before cocaine (20 mg/kg, i.p.) or saline administration.

Related Experiment Videos

  • Motor activity was continuously monitored for 3 hours post-cocaine administration.

    • Main Results:

    • All tested iboga agents exhibited acute inhibitory effects on cocaine-induced hyperactivity.
    • Delayed potentiating effects on cocaine-induced hyperactivity were observed for all three iboga agents.
    • These time-dependent effects were distinct from any motor activity induced by the iboga agents alone.

    Conclusions:

    • The observed time-dependent dual effects (acute inhibition, delayed potentiation) of iboga agents on cocaine-induced hyperactivity can explain previously reported contradictory findings.
    • These findings highlight the importance of considering the timing of administration when evaluating the effects of iboga agents on stimulant-induced behaviors.