Sleepwalking in Adults: Causes, Risks, and How to Stop It

Sleepwalking adults are more common than most people assume. While the image of a zombie-like child wandering the hallway feels familiar, roughly 3.6% of U.S. adults — over 8 million people — experience at least one sleepwalking episode per year. If you've woken up in a strange part of your home, been told you were up in the night, or simply want to understand what's happening to someone you love, this guide covers the science, the dangers, and the concrete steps you can take to stop it.

What Is Sleepwalking (Somnambulism) and When Does It Happen?

Somnambulism in adults is classified as a non-REM parasomnia — a disruption that occurs during the deeper stages of sleep rather than during dreaming. Specifically, episodes arise during slow-wave sleep (Stage 3 NREM), typically in the first third of the night when that stage is most concentrated.

During slow-wave sleep, your motor cortex can become partially activated while the brain regions responsible for conscious awareness and decision-making stay largely offline. The result is movement — sometimes simple, sometimes surprisingly complex — with no memory of it afterward. Adults who sleepwalk may walk, eat, leave the house, or even drive, all while their brain remains in a state that prevents true wakefulness or full recall.

Adult Sleepwalking Causes: Why It Happens

Unlike childhood sleepwalking, which often has a strong genetic component and tends to resolve with age, adult sleepwalking causes are frequently tied to identifiable triggers. The most common include:

• Sleep deprivation. Skipping sleep increases the depth and intensity of slow-wave sleep on recovery nights, raising the likelihood of a parasomnia episode. Even a single night of poor sleep can prime the next night for sleepwalking.
• Stress and anxiety. Elevated cortisol and psychological arousal disrupt the normal architecture of sleep, creating unstable transitions between stages.
• Alcohol and sedatives. Alcohol suppresses REM sleep and deepens slow-wave sleep in the first half of the night, creating fertile ground for motor activity during NREM. Certain sleep aids, particularly z-drugs like zolpidem (Ambien), carry FDA warnings for complex sleep behaviors including sleepwalking.
• Obstructive sleep apnea (OSA). Repeated micro-arousals from breathing pauses can destabilize slow-wave sleep, triggering episodes. Studies suggest adults with untreated OSA are significantly more likely to experience parasomnias.
• Fever and illness. An elevated body temperature during illness can disrupt normal sleep staging.
• Genetics. If a first-degree relative sleepwalks, your risk is 10 times higher than someone with no family history.

The Real Risks of Sleepwalking in Adults

The biggest danger is injury. Unlike children, adults are heavier, faster, and more capable of complex behavior — including navigating stairs, unlocking doors, or getting into a car. Research published in the journal Neurology found that 58% of adult sleepwalkers reported injuries during episodes, ranging from bruises and lacerations to fractures and, in rare cases, life-threatening accidents.

Beyond physical harm, sleepwalking fragments sleep quality even when you don't remember it. The partial arousal that triggers an episode prevents you from completing a full slow-wave cycle, leaving you less rested even after eight hours in bed. Chronic episodes can also cause significant anxiety, embarrassment, and relationship strain — particularly for partners who witness them.

There is also a legal and safety dimension worth taking seriously: sleepwalking adults who drive or leave their homes expose themselves and others to genuine risk.

How to Stop Sleepwalking: Evidence-Based Strategies

Addressing sleepwalking adults requires targeting the underlying triggers first. Here's what the evidence supports:

1. Prioritize consistent, sufficient sleep. Because sleep deprivation is the most reliable trigger, maintaining a regular sleep schedule — even on weekends — reduces the intensity of slow-wave sleep rebound. Most adults need 7–9 hours. Going to bed and waking at the same time every day stabilizes sleep architecture within a few weeks.

2. Reduce alcohol and review medications. Eliminate alcohol for at least four hours before bed. If you take zolpidem, eszopiclone, or other sedative-hypnotics and have noticed unusual nighttime behavior, speak with your doctor immediately — alternative medications or dose adjustments are often available.

3. Manage stress systematically. Cognitive behavioral therapy for insomnia (CBT-I) and mindfulness-based stress reduction have both demonstrated reductions in parasomnia frequency in clinical settings. Even 10 minutes of structured breathing before bed can lower pre-sleep arousal. SleepBetter.ai's guided breathwork sessions are designed specifically to bring your nervous system into a calmer state before you drift off, reducing the conditions that trigger episodes.

4. Get evaluated for sleep apnea. If you snore, wake unrefreshed, or share a bed with someone who notices your breathing stops, a sleep study is warranted. Treating OSA with CPAP often resolves associated parasomnias entirely.

5. Consider scheduled awakenings. A technique used in clinical practice, scheduled awakenings involve having a sleep partner gently rouse you 15–30 minutes before the typical time of your episodes for several consecutive weeks. Over time, this can disrupt the pattern. It requires tracking when episodes occur — keep a sleep diary or use an app that logs your nightly data.

6. Secure your environment. While addressing root causes, protect yourself now: lock exterior doors with a mechanism that requires a code (deadbolts alone aren't sufficient), install door alarms, sleep on the ground floor if possible, and remove sharp objects from the path between your bed and common destinations.

For a complete overview of sleep improvement strategies that support healthy sleep architecture, see our guide on how to sleep better.

When to See a Doctor

See a sleep specialist or neurologist if episodes are frequent (more than once per month), involve dangerous behavior, began suddenly in adulthood with no obvious trigger, or are accompanied by other symptoms like acting out dreams (which may indicate REM sleep behavior disorder, a different and more serious condition). A formal polysomnography study can confirm the diagnosis and rule out other causes.