Neurochemical Research

, Volume 21, Issue 6, pp 691–693 | Cite as

Prevention of cocaine-induced hyperactivity by a naloxone isomer with no opiate antagonist activity

  • Nithiananda Chatterjie
  • George J. Alexander
  • Jeri A. Sechzer
  • Kenneth W. Lieberman
Original Articles


Dextro-naloxone [(+)-naloxone], an isomer with almost no opiate antagonist activity and no effect on spontaneous locomotor activity, can reduce cocaine-induced hyperactivity in mice. The classical opiate antagonist,levo-naloxone [(−)-naloxone], is known to counteract the excitatory motor effects of amphetamine and cocaine, but it has been tacitly assumed that this action oflevo-naloxone is dependent on its ability to antagonize endogenous opioids. Our finding that a naloxone isomer with little or no opioid antagonist activity is also able to inhibit the cocaine effect on spontaneous motility, calls for a reconsideration of this assumption.

Key Words

Cocaine hyperactivity naloxone dextro-naloxone opiate antagonist 


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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • Nithiananda Chatterjie
    • 1
  • George J. Alexander
    • 1
  • Jeri A. Sechzer
    • 2
  • Kenneth W. Lieberman
    • 3
  1. 1.New York State Institute for Basic Research in Developmental DisabilitiesStaten Island
  2. 2.Department of PsychologyPace UniversityNew York
  3. 3.Department of PsychiatryUniversity of Medicine and Dentistry of New JerseyNewark

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