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Paradoxical effects of the hypnotic Zolpidem in the neonatal ferret

Nina Hsu1, Sushil K Jha, Tammi Coleman

  • 1Department of Neuroscience, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.

Behavioural Brain Research
|May 12, 2009
PubMed

Insights

Common sleep medications like Zolpidem (Ambien) may negatively impact neonatal sleep architecture. This study found Zolpidem reduced REM sleep and altered sleep patterns in infant ferrets.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Developmental Biology

Background:

  • Hypnotic medications are increasingly prescribed for pediatric insomnia.
  • The effects of these drugs on neonatal sleep patterns remain largely unknown.

Purpose of the Study:

  • To investigate the impact of Zolpidem, a non-benzodiazepine hypnotic, on neonatal sleep architecture and electroencephalographic (EEG) activity.
  • To understand the behavioral and physiological effects of Zolpidem in a neonatal animal model.

Main Methods:

  • Neonatal ferrets underwent surgical preparation for EEG/electromyographic (EMG) recordings.
  • Animals received vehicle or Zolpidem (2 mg/kg or 20 mg/kg) via intraperitoneal injection over three days.
  • Sleep architecture, EEG energy, and behavioral states were analyzed.

Main Results:

  • Zolpidem did not increase non-rapid-eye-movement (NREM) or total sleep time.
  • Zolpidem significantly reduced REM sleep and total sleep duration.
  • Increased NREM sleep bout duration and higher-frequency EEG energies were observed during REM and NREM sleep.
  • A transient intermediate state between wake and sleep was noted.

Conclusions:

  • Commonly used hypnotics like Zolpidem can induce distinct and potentially adverse effects on neonatal sleep.
  • Findings highlight the critical need for caution when using adult-targeted sleep aids in neonates due to differing physiological responses.

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