Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 11/7/2025

Altered Level of Consciousness with Zolpidem

Clinical Effects and Risks

  • The American Academy of Sleep Medicine reports that zolpidem causes sedation and somnolence as common adverse effects, with a 0.04 risk difference compared to placebo in meta-analyses 1, 2, 3
  • Excessive sleepiness was demonstrated when zolpidem 10 mg was given less than 8 hours before awakening, with significantly reduced sleep latencies and cognitive impairment at 4-5 hours post-administration 1, 2
  • Combining zolpidem with other substances can increase the risk of CNS depression, and patients should seek immediate medical attention if they experience extreme confusion, inability to awaken, or difficulty breathing 4

Special Considerations

  • Patients taking zolpidem should be warned about possible drowsiness, reduced alertness, and impaired performance the morning after therapy, and a full night of sleep (7-8 hours) is required to minimize the risk of next-day impairment 4

REFERENCES

1

clinical practice guideline for the pharmacologic treatment of chronic insomnia in adults: an american academy of sleep medicine clinical practice guideline. [LINK]

Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2017

2

clinical practice guideline for the pharmacologic treatment of chronic insomnia in adults: an american academy of sleep medicine clinical practice guideline. [LINK]

Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2017

3

clinical practice guideline for the pharmacologic treatment of chronic insomnia in adults: an american academy of sleep medicine clinical practice guideline. [LINK]

Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2017

4

Risks of Combining Ambien and Hydroxyzine [LINK]

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025