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  3. Opioid-induced Nodding-not A Nice Nap.
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  3. Opioid-induced Nodding-not A Nice Nap.

Related Experiment Video

A Method of Nodose Ganglia Injection in Sprague-Dawley Rat
09:28

A Method of Nodose Ganglia Injection in Sprague-Dawley Rat

Published on: November 25, 2014

Opioid-Induced Nodding-Not a Nice Nap.

Kenneth Blum1,2,3,4, Alireza Sharafshah3,4, Kyriaki Thanos5

  • 1Department of Molecular Biology, Adelson School of Medicine, Ariel University, Ariel, Israel.

Acta Scientific Neurology
|June 10, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Opioid-induced nodding is a dangerous sign of respiratory depression, not sleep. It can lead to brain injury and cognitive impairment, especially with fentanyl, and requires better harm reduction.

Keywords:
NoddingOpioid Use Disorder (OUD)Sleep

Related Experiment Videos

A Method of Nodose Ganglia Injection in Sprague-Dawley Rat
09:28

A Method of Nodose Ganglia Injection in Sprague-Dawley Rat

Published on: November 25, 2014

Area of Science:

  • Neuroscience
  • Toxicology
  • Public Health

Background:

  • Opioid-induced "nodding" is often mistaken for sleep but is a critical sign of drug-induced respiratory depression.
  • This state can cause hypoxia and hypercapnia without protective arousal, posing risks, especially with fentanyl and other sedatives.

Purpose of the Study:

  • To highlight the neurological risks associated with opioid-induced nodding.
  • To advocate for redefining nodding as a critical respiratory compromise state.

Main Methods:

  • Literature review utilizing PubMed to synthesize existing research on opioid-induced nodding.
  • Analysis of clinical and neuroimaging evidence linking nodding to neurological outcomes.

Main Results:

  • Nodding signifies fluctuating consciousness due to respiratory depression, a precursor to respiratory failure.
  • Repeated nodding episodes may cause cumulative hypoxic-ischemic brain injury, hippocampal atrophy, and cognitive deficits.
  • Current surveillance underestimates the neurological impact on survivors, focusing mainly on mortality.

    • Conclusions:

    • Nodding is a sentinel event indicating significant respiratory compromise and potential neurological damage.
    • Public health strategies must evolve to recognize nodding as a high-risk state requiring intervention.
    • Improved surveillance, reporting, and harm-reduction initiatives are crucial for managing the neurological burden of opioid use.