Evidence-Based Reviews

Cognitive-behavioral therapy for insomnia: A review of 8 studies

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  • A significant improvement in nightmares was noted in both groups (29% of participants showed a clinically-significant reduction in nightmare frequency and 22% of participants achieved remission).
  • CBT-I plus IR was not superior to CBT-I only at postintervention and at 6-month follow-up.


  • Both IR and CBT-I demonstrated efficacy for decreasing nightmare frequency and distress.
  • Combining IR and CBT-I may not provide a synergistic advantage over CBT-I alone for treating PTSD-related nightmares in veterans.


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