Most people think of night terrors as something children outgrow by age 12. But adult night terrors — formally classified as sleep terrors under the NREM parasomnias — affect an estimated 2–3% of adults, and for those who experience them, the impact on sleep quality, relationships, and daily functioning can be significant.
I've worked with adults who've lived with night terrors for years before getting any useful guidance, largely because the condition is so often dismissed or misidentified. This article explains exactly what adult night terrors are, why they happen, what makes them worse, and what the evidence says about treating them.
Night Terrors vs. Nightmares: An Important Distinction
These two terms are often used interchangeably, but they're neurologically distinct experiences:
| Feature | Night Terrors | Nightmares |
|---|---|---|
| Sleep stage | NREM Stage 3 (deep sleep) | REM sleep |
| When in night | First third (1–3 hrs after sleep) | Last third (early morning) |
| Memory after | Usually none | Often vivid recall |
| Consciousness during | Eyes open, appears awake but isn't | Sleeping, brain highly active |
| Physical symptoms | Screaming, thrashing, sweating, rapid HR | Usually minimal movement |
Night terrors occur during the arousal from deep NREM sleep — the brain is partially waking but hasn't fully transitioned to consciousness. This creates a state of extreme physiological activation (screaming, thrashing, elevated heart rate, profuse sweating) with no waking awareness. Partners and roommates are often more distressed by the event than the person experiencing it, who typically has no memory of it in the morning.
What Causes Adult Night Terrors?
Night terrors arise from disruptions to the normal transition out of deep sleep. Several factors can precipitate or worsen them:
Sleep Deprivation and Fragmented Sleep
The most consistent trigger. When you're sleep-deprived, your brain responds with more slow-wave (deep) sleep on recovery nights — and more deep sleep means more opportunities for incomplete arousal. Research published in Sleep Medicine Reviews confirms that sleep deprivation significantly increases NREM parasomnia frequency.
Stress and Anxiety
Psychological stress increases arousal thresholds and disrupts the clean transitions between sleep stages. High cortisol levels — common with chronic stress — fragment deep sleep and create conditions where the brain partially wakes without completing the transition to consciousness. Many adults report their night terrors beginning or intensifying during high-stress periods.
Alcohol and Sedatives
Alcohol suppresses REM sleep in the first half of the night while increasing slow-wave sleep — then causes a rebound of disturbed sleep in the second half. Sedatives and benzodiazepines similarly disrupt normal sleep architecture. Both are known night terror triggers.
Sleep Apnea
Obstructive sleep apnea causes repeated micro-arousals from deep sleep as the brain responds to oxygen drops. These arousals can trigger night terror episodes in susceptible individuals. Treating the apnea frequently resolves the night terrors. If you snore heavily or show other signs of apnea, see our guide on signs of sleep apnea.
Fever and Illness
Fever disrupts sleep architecture and can trigger night terrors in adults who don't otherwise experience them. This is a temporary cause that resolves with illness recovery.
Certain Medications
Beta-blockers, some antidepressants (particularly SSRIs), stimulants, and sleep medications have all been associated with NREM parasomnia events including night terrors. If night terrors began after starting a new medication, discuss this with your prescribing physician.
Evidence-Based Approaches to Treatment
Scheduled Awakenings
This is one of the most effective behavioral treatments for recurrent night terrors. The approach involves waking the person 15–30 minutes before their typical night terror time for several consecutive nights. Studies show scheduled awakenings eliminate night terrors in the majority of cases within a week. Since night terrors typically occur at predictable times (usually 60–90 minutes after sleep onset), this approach is highly practical. A partner's help is usually needed.
Sleep Hygiene and Deprivation Reduction
Ensuring adequate, consistent sleep — especially consistent bedtimes — is foundational. Night terrors often decrease dramatically when sleep debt is addressed and a regular schedule is established. Take our Sleep Score assessment to identify specific sleep hygiene factors that may be contributing.
Stress Management
Relaxation techniques (progressive muscle relaxation, diaphragmatic breathing, yoga) that reduce pre-sleep arousal have clinical support for reducing NREM parasomnia frequency. Cognitive Behavioral Therapy (CBT) is appropriate if anxiety or PTSD underlies the terrors.
Pharmacological Options
When behavioral approaches are insufficient, a physician may prescribe low-dose clonazepam or imipramine — both have evidence for suppressing NREM parasomnias. These are short-term solutions and have their own side-effect profiles. Discuss with a sleep medicine specialist.
When to See a Doctor
Seek evaluation if:
- Night terrors occur more than once per week
- Episodes involve violent behavior that could injure you or a partner
- You have daytime sleepiness that suggests underlying sleep apnea
- Episodes began suddenly in adulthood with no prior history — this warrants neurological evaluation
- Night terrors are accompanied by sleepwalking
Medical disclaimer: This article is for informational purposes only. Night terrors that are frequent, violent, or accompanied by other symptoms should be evaluated by a licensed healthcare provider or sleep medicine specialist.
About the author: Morgan Wells is a certified sleep analyst and wellness writer with over a decade of experience in behavioral sleep health. Learn more about Morgan.