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Precipitated opioid withdrawal across acute physical dependence induction methods.
Peggy Compton1, Karen Miotto, David Elashoff
1School of Nursing, University of California at Los Angeles, Los Angeles, CA 90266, USA. pcompton@sonnet.ucla.edu
Pharmacology, Biochemistry, and Behavior
|January 31, 2004
Summary
This study compared different methods for inducing acute opioid physical dependence (APD) in humans. Researchers found that various opioid pretreatments and naloxone administration schedules resulted in similar withdrawal severity, offering reliable models for dependence research.
Area of Science:
- Pharmacology
- Neuroscience
- Clinical Research
Background:
- Acute opioid physical dependence (APD) serves as a model for human opioid dependence.
- Previous studies induced APD using various opioids and naloxone schedules but lacked direct comparison of withdrawal severity.
Purpose of the Study:
- To directly compare the withdrawal severity induced by different acute opioid physical dependence (APD) protocols.
- To evaluate the reliability of various APD induction methods in eliciting withdrawal symptoms.
Main Methods:
- A crossover design study involved four healthy male subjects.
- Subjects received pretreatment with morphine (intramuscular or intravenous) or intravenous hydromorphone.
- Naloxone was administered 2 or 6 hours later, with physiological and subjective withdrawal indicators measured.
Main Results:
- All tested opioid pretreatment protocols reliably induced acute opioid physical dependence (APD).
- Repeated-measures analysis of variance (ANOVA) indicated no significant differences in withdrawal pattern or severity across conditions.
- Both physiological and subjective measures showed comparable withdrawal symptoms regardless of opioid type or administration route.
Conclusions:
- Different acute opioid physical dependence (APD) induction protocols, varying opioid type and administration route, produce similar and reliable withdrawal symptoms in humans.
- These findings support the utility of these diverse APD protocols for studying opioid dependence mechanisms.