Discriminable Stimuli Produced by Analgesics

  • Harbans Lal
  • Gerald Gianutsos
  • Stephen Miksic
Part of the Advances in Behavioral Biology book series (ABBI, volume 22)


Narcotic analgesics are drugs primarily used to relieve pain. Although narcotic drugs were originally natural products, many new drugs are synthetic. All known narcotic analgesics also produce a number of effects other than analgesia which make them valuable for other clinical uses but also constitute potentials for abuse and narcotic dependence. In addition, there are several pharmacological properties which are characteristic of only a few narcotics and are absent in the rest of them. For example, morphine is known to initially cause vomiting and later show a strong anti-emetic property. All synthetic narcotics are purely anti-emetic and are devoid of the initial emetic action. Similarly, various narcotic analgesics differ in their respiratory depressant property. Whereas they all produce respiratory depression, with some a rapid tolerance develops which allows for further use to relieve pain without concommitant depression of respiration.


Discriminable Stimulus Narcotic Drug Narcotic Antagonist Training Drug Tail Withdrawal 
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Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • Harbans Lal
    • 1
  • Gerald Gianutsos
    • 1
  • Stephen Miksic
    • 1
  1. 1.Department of Pharmacology & Toxicology and Department of PsychologyUniversity of Rhode IslandKingstonUSA

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