Ambien and Complex Sleep Behaviors: Sleepwalking, Sleep-Driving, and Sleep-Eating

A hypothetical scenario (a composite, not a real case): It is 2:40 a.m. A woman in her fifties, who took her sleeping pill a little after midnight, is standing in her kitchen. The stovetop is on. A pan of eggs is starting to smoke. Her husband, woken by the alarm, finds her calm, glassy-eyed, and unresponsive to her name. He gently walks her back to bed. In the morning she remembers nothing, and only the burnt pan in the sink tells the story.

That scenario is invented, but every element of it matches the kinds of events described in U.S. Food and Drug Administration (FDA) safety reports. Ambien complex sleep behaviors are actions a person carries out while not fully awake after taking zolpidem, the drug in Ambien. They range from walking around the house to driving a car, and the person usually has no memory of them afterward. They are uncommon, but they have caused serious injuries and deaths, which is why the FDA placed its most prominent warning, a boxed warning, on zolpidem and two related medicines in 2019.

This guide explains what these behaviors look like, how the FDA’s warnings developed over time, why the brain can act while “asleep,” and how households can lower the risk. If you need a general overview of the medication first, see our guide to what Ambien is used for and how it is prescribed.

Quick answer: Zolpidem (Ambien, Ambien CR, Edluar, Intermezzo, and generics), eszopiclone (Lunesta), and zaleplon (Sonata) carry an FDA boxed warning for complex sleep behaviors such as sleepwalking and sleep-driving. These events can happen after the first dose, at the lowest recommended dose, and with or without alcohol. Anyone who has had an episode should stop the medicine and contact their prescriber; the drugs are now contraindicated for people with a past episode.

---

Ambien Complex Sleep Behaviors: What Counts?

The phrase sounds technical, but the idea is simple. A complex sleep behavior is any purposeful-looking activity done while a person is not fully conscious. The person may move with apparent skill, open doors, use appliances, or hold a conversation, yet later have no recollection. The current Ambien prescribing information names sleepwalking and sleep-driving in its boxed warning and lists other reported activities, including preparing and eating food, making phone calls, and having sex.

These episodes differ from ordinary grogginess. Someone who is merely drowsy knows they are awake and remembers the morning. During a complex sleep behavior, the person’s awareness and memory systems are largely offline even though the body is moving. Family members often describe the person as “on autopilot,” with open eyes, a blank expression, and slow or odd responses.

Types of behaviors and why each is dangerous

Behavior	What it can look like	Why it is risky
Sleepwalking	Getting out of bed, wandering through rooms, opening doors or windows	Falls down stairs, collisions, cuts from broken glass, wandering outdoors
Sleep-driving	Leaving the house, starting a car, driving to a store or another address	Crashes that can injure or kill the driver, passengers, pedestrians, and other motorists
Sleep-eating	Raiding the fridge or pantry, often eating unusual combinations or raw items	Choking, eating spoiled or non-food items, burns, problems for people with diabetes or food allergies
Cooking	Turning on burners or ovens, using knives, heating food	Kitchen fires, burns, smoke and gas exposure, cuts
Phone calls, texting, online activity	Calling or messaging people, posting online, making purchases	Embarrassing or harmful messages, financial loss, damaged relationships
Leaving the house	Walking outside in nightclothes, sometimes in bad weather	Cold exposure, getting lost, traffic, drowning near water

The FDA’s 2019 review of serious cases gives a sobering picture of what can go wrong. Reported injuries included falls with skull bleeding and broken hips or vertebrae, burns, near-drowning and drowning, hypothermia (in one case leading to loss of a limb), carbon monoxide poisoning, gunshot wounds, and fatal car crashes. The agency also noted reports of self-injury and suicide attempts during episodes. These are not common outcomes, but they show why the agency treated the issue so seriously.

Ambien Sleepwalking vs. Ordinary Sleepwalking

Sleepwalking existed long before sleep medications. The American Academy of Sleep Medicine’s patient site describes it as a parasomnia that usually happens during deep, slow-wave sleep in the first part of the night, and it lists triggers such as sleep deprivation, stress, alcohol, certain medicines, and sleeping in unfamiliar places. People who sleepwalk typically have glassy eyes, are hard to wake, and do not remember the episode.

Medication-associated episodes look similar on the surface but differ in a few important ways:

• They can appear in people with no history of sleepwalking. Someone who has never walked in their sleep may have a first episode after starting zolpidem.
• The activities can be more elaborate. Driving a car or cooking a meal goes well beyond the shuffling around the bedroom that many people picture.
• Memory loss is the rule. The FDA has noted that patients usually do not remember these events, which means the first sign may be physical evidence: a dented car, crumbs in the bed, unfamiliar messages on a phone.
• They can occur at standard doses. The FDA reported serious events at the lowest recommended doses and after a single dose.

If you are trying to understand the memory side of these events in more depth, our companion article on Ambien memory loss and anterograde amnesia explains why the brain fails to record what happens during and after a dose.

The Regulatory Story: A Timeline of FDA Actions

The boxed warning did not appear out of nowhere. It was the end point of more than a decade of growing concern, news reports, and adverse-event data. Here is how the safety picture evolved.

When	What happened	What it meant for patients
Late 2006 to March 2007	The FDA asked manufacturers of 13 sedative-hypnotic products, including Ambien, Ambien CR, and Lunesta, to strengthen labeling about severe allergic reactions and complex sleep-related behaviors such as sleep-driving. Manufacturers were also asked to create patient Medication Guides.	For the first time, sleep-driving and related behaviors were described as a class concern across sleep medications, and patients began receiving written handouts at the pharmacy.
January and May 2013	After data showed zolpidem levels could stay high enough the next morning to impair driving, the FDA lowered the recommended starting dose for women (5 mg immediate-release, 6.25 mg extended-release) and recommended prescribers consider the lower dose for men as well.	The change focused on next-morning impairment rather than night-time behaviors, but it reinforced the idea that more drug in the bloodstream means more risk.
April 30, 2019	The FDA required a boxed warning on eszopiclone, zaleplon, and zolpidem for complex sleep behaviors, and added a contraindication for patients who had previously experienced one.	Prescribers were told not to prescribe these drugs to anyone with a past episode, and patients were told to stop the medicine and call their health professional if an episode happens.

What the 2019 review found

According to the FDA’s April 2019 Drug Safety Communication, the agency identified 66 cases over roughly 26 years in which complex sleep behaviors led to serious injury. Twenty of those cases were fatal. Most came from the FDA Adverse Event Reporting System, with a few from published medical literature. Contemporary reporting on the announcement noted that the large majority of cases involved zolpidem, with smaller numbers for eszopiclone and zaleplon, which partly reflects how widely zolpidem is used.

Several findings shaped the warning:

• Events happened in people with and without alcohol or other sedating drugs in their system.
• Some occurred after a single dose; others after longer use.
• Serious injuries occurred even at the lowest recommended doses.
• Patients usually had no memory of what they had done.

The FDA also stressed that reported cases likely understate the true number, because adverse event reporting is voluntary. That is a common limitation of safety surveillance and one reason the agency asks patients and families to report events themselves, which we cover below.

Why a boxed warning matters

A boxed warning, sometimes called a “black box” warning, appears at the very top of a drug’s prescribing information inside a bordered box. It is the FDA’s strongest labeling tool short of removing a product from the market. For patients, the practical changes were twofold: the Medication Guide now leads with this risk, and anyone with a prior episode is formally excluded from using these drugs again.

Which Medicines Does the Warning Cover?

The warning applies to three active ingredients, often grouped together as “Z-drugs.” The FDA said these three appear to cause complex sleep behaviors more often than other prescription sleep medicines.

• Zolpidem: Ambien (immediate-release), Ambien CR (extended-release), Edluar (sublingual tablet), Intermezzo (low-dose sublingual tablet for middle-of-the-night waking), Zolpimist (oral spray), and generic versions. Every one of these forms carries the same warning, regardless of how quickly it acts.
• Eszopiclone: Lunesta and generics. See our comparison of Ambien vs. Lunesta.
• Zaleplon: Sonata and generics. See Ambien vs. Sonata for how this shorter-acting option compares.

A key point for anyone who has had an episode on one of these drugs: switching to another Z-drug is not a workaround. The contraindication applies to people who experienced a complex sleep behavior after taking any of the three. Your prescriber will look at different approaches instead.

Why Does It Happen? The Brain Between Sleep and Wake

Scientists do not have a complete explanation, but the leading idea is that sleep and wakefulness are not a simple on/off switch. Different brain regions can be in different states at the same moment. During a complex sleep behavior, areas that control movement and familiar routines appear active enough to carry out a learned sequence, like walking to the kitchen or driving a well-known route. Meanwhile, the regions responsible for judgment, self-awareness, and laying down new memories remain suppressed.

Zolpidem strengthens the effect of GABA, the brain’s main calming chemical, at specific GABA-A receptors. That broad dampening helps people fall asleep, but it can also leave the “supervisor” functions of the brain switched off while habit-driven systems are partially roused, for example by a noise, a full bladder, or hunger. The result is a person who can act but cannot reflect on what they are doing or remember it later.

Factors that raise the odds

The FDA, the prescribing information, and MedlinePlus point to several circumstances that make problems more likely. Thinking about them as a list of “conditions that put more drug, or less sleep, into the night” can help:

1. Higher doses than prescribed. Taking an extra tablet because the first “didn’t work” increases drug levels and risk. The label caps the total nightly dose of immediate-release Ambien at 10 mg.
2. Alcohol. Alcohol adds to zolpidem’s sedating effects. The label advises patients not to take Ambien if they drank alcohol that evening.
3. Other central nervous system depressants. Opioid pain medicines, benzodiazepines, some antihistamines, other sleep aids, and certain other prescriptions can stack sedation. The FDA specifically warned against combining these drugs with other sleep medicines, including over-the-counter products.
4. Not leaving enough time in bed. The label says to take Ambien only when you can remain in bed for a full night, at least 7 to 8 hours, before you need to be active. Sonata and Intermezzo, which are designed differently, carry a shorter minimum. Waking or being woken early while drug levels are still high sets the stage for confused, semi-awake activity.
5. Taking the dose and then staying up. Remaining active after a dose, rather than going straight to bed, can blur the line between wake and drug-induced sleep.
6. Individual sensitivity. Women clear zolpidem more slowly than men on average, which is why their recommended starting dose is lower; our article on why women are prescribed lower Ambien doses explains the background. Older adults are also more sensitive, a topic covered in Ambien for older adults and fall risk.

It is important to say this clearly: avoiding these factors lowers risk but does not eliminate it. The FDA documented serious events in people who followed directions exactly. That is why the safety plan below matters even for careful users.

Bedroom and Household Safety Plan for Ambien Complex Sleep Behaviors

No checklist can make a sedative-hypnotic risk-free, and the safest response to any episode is stopping the drug under medical guidance. But while you and your prescriber are deciding whether a sleep medication is right for you, these practical steps can reduce the chance that a night-time episode turns into an injury. Many of them mirror the bedroom safety advice the American Academy of Sleep Medicine gives for sleepwalking in general.

Before you take a dose

• Confirm you have a full night ahead: no early flight, no shift starting in five hours, no baby or relative you expect to tend to overnight.
• Skip alcohol that evening, and check with your pharmacist about every other medicine and supplement you take.
• Take the dose only once you are in bed and ready to sleep, not while you are still finishing chores or scrolling on the couch.
• Never take a second dose in the same night, and do not combine it with another sleep aid.

Car and keys

• Leave car keys with a partner or in a lockbox, or put them somewhere that takes deliberate effort to reach.
• If you live alone and drive, consider a simple key safe with a code you would have to think about.
• Keep in mind that morning-after impairment is a separate but related risk; our guide to Ambien next-day drowsiness and driving covers it in detail.

Kitchen

• Use stove knob covers or turn off the gas valve at night if that is practical in your home.
• Unplug small appliances such as toasters, air fryers, and electric kettles before bed.
• Store knives in a drawer rather than on the counter.
• Keep working smoke and carbon monoxide alarms on every level of the home.

Doors, stairs, and exits

• Lock exterior doors and windows; a door chime or simple motion alert can wake a partner if someone leaves the bedroom.
• Use a gate at the top of the stairs if falls are a concern.
• Clear clutter, cords, and rugs from the path between the bed, bathroom, and hallway, and use low night-lights.
• Avoid sleeping in a loft or bunk bed while using a sedative-hypnotic.

Phone, money, and other hazards

• Charge your phone outside the bedroom or turn on a sleep or focus mode that limits outgoing calls and messages.
• Log out of shopping apps or remove saved payment details from the device you keep by the bed.
• Store firearms locked and unloaded, with ammunition kept separately; firearm injuries were among the serious outcomes the FDA described.
• Keep medication bottles away from the bedside table so an extra dose cannot be taken half-asleep.

Tell someone

• Let a partner, roommate, or family member know you are taking a medicine with this warning, and ask them to tell you (and your prescriber) if they notice unusual night-time activity. MedlinePlus makes the same suggestion.
• Explain that if they find you sleepwalking, the general advice is to guide you gently back to bed rather than shout, shake, or restrain you.

What to Do If an Episode Happens

Many people only learn about an episode from clues: an empty ice-cream carton, a car parked at an angle, sent messages they did not write, or a partner’s concerned description. However you find out, the steps are the same.

Right away

1. Check for injuries. Look for cuts, bruises, burns, or head bumps, especially after a fall. Head injury symptoms such as worsening headache, vomiting, confusion, or unusual sleepiness need emergency care.
2. Check the home. Make sure the stove is off, doors are locked, and nothing was left running or open.
3. Get emergency help when needed. Call 911 for a crash, a serious injury, breathing difficulty, or if the person cannot be woken. For a suspected overdose or accidental extra dose, Poison Control is available at 1-800-222-1222.

The same day

1. Do not take another dose. The FDA’s advice is to stop the medicine after a complex sleep behavior and contact your health care professional right away.
2. Call your prescriber. Describe what happened, the time you took the dose, how much you took, whether alcohol or other medicines were involved, and how many hours you were in bed. This helps them understand the episode and plan next steps.
3. Ask about next steps for sleep. Because these drugs are now contraindicated after an episode, your prescriber will discuss other options. These may include cognitive behavioral therapy for insomnia (CBT-I), a review of other medications, evaluation for sleep apnea or another sleep disorder, or a different type of sleep medicine. Our comparison of Ambien vs. trazodone for insomnia gives background for that conversation; your clinician will decide what is appropriate.

If you have been taking zolpidem nightly for weeks or months, tell your prescriber that too. Long-term users can experience rebound insomnia or withdrawal symptoms when a drug stops, and your clinician can help you manage that safely. Our article on Ambien withdrawal and rebound insomnia explains what to expect.

Going forward

Once you have had a complex sleep behavior on zolpidem, eszopiclone, or zaleplon, the prescribing information for all three lists that history as a reason not to use them. Make sure the episode is recorded in your medical chart and that every prescriber, including urgent care and hospital teams, knows about it. It is also wise to add it to any medication list or allergy-and-intolerance card you carry.

If an episode involved self-harm, or if you are struggling with thoughts of suicide, you can call or text the 988 Suicide & Crisis Lifeline at any time. If medication or alcohol use has become hard to control, the SAMHSA National Helpline (1-800-662-4357) offers free, confidential referrals 24 hours a day.

How to Report an Episode to FDA MedWatch

Every individual report of Ambien complex sleep behaviors helps the FDA see patterns, and the 2019 boxed warning was built on reports just like these. Patients, family members, and caregivers can all submit a report; you do not need a health professional to do it for you, although your prescriber may also file one.

According to the FDA’s MedWatch reporting page, you can report in three ways:

• Online: through the MedWatch online reporting form, which the FDA describes as the easiest option.
• By mail or fax: using Form FDA 3500B, the consumer-friendly version of the form, which can be downloaded from the FDA website.
• By phone: at 1-888-INFO-FDA (1-888-463-6332), choosing the MedWatch option for reporting or instructions.

What to include in your report

• The medicine name, strength, form (tablet, sublingual, spray, extended-release), and manufacturer if it is on the label.
• The dose taken and the time, plus when you went to bed and when the episode was discovered.
• Other medicines, supplements, and any alcohol used that day.
• A plain description of what happened and any injuries or property damage.
• What happened afterward, such as medical care received and whether the drug was stopped.

You can leave out anything you do not know. A partial report is still useful.

Weighing Benefits and Risks With Your Prescriber

None of this means zolpidem is the wrong choice for everyone. Many people use it short-term without any night-time incidents, and insomnia itself carries real health and safety costs. The point of the boxed warning on Ambien complex sleep behaviors is informed use: knowing the risk, reducing the conditions that feed it, and acting quickly if a warning sign appears.

Questions worth bringing to your next appointment include:

• Is my dose the lowest one likely to work for me?
• Do any of my other prescriptions or supplements add to the sedation?
• How long do you expect me to use this medicine, and what is the plan for reviewing it? (Our article on Ambien tolerance and dependence discusses why duration matters.)
• Would CBT-I or an evaluation for a sleep disorder be helpful for me?
• Who in my household should know about the warning, and what should they watch for?

Zolpidem is a Schedule IV controlled substance in the United States, and it should only be used as prescribed for the person whose name is on the bottle. Never share it, and never change your dose, split extended-release tablets, or combine it with other sedatives without a prescriber’s or pharmacist’s guidance.

---

Frequently Asked Questions

Can Ambien cause sleepwalking the first time you take it?

Yes. The FDA reported that complex sleep behaviors, including sleepwalking, can occur after a single dose as well as after longer treatment. A first-night episode is still a reason to stop and contact your prescriber.

How common is sleep-driving on Ambien?

The FDA describes serious complex sleep behaviors as rare, but it has not published a reliable rate for sleep-driving specifically. Reports rely on voluntary submissions, so the true number is not known and is likely higher than the count of reported cases.

Does the boxed warning apply to Lunesta and Sonata too?

Yes. The April 2019 boxed warning and contraindication cover eszopiclone (Lunesta) and zaleplon (Sonata) as well as all zolpidem products, including Ambien CR, Edluar, Intermezzo, and generics.

Is it safe to keep taking Ambien after one episode if I avoid alcohol?

Not according to current labeling. A prior complex sleep behavior is a contraindication, meaning the drug should not be used again, regardless of whether alcohol was involved. Talk with your prescriber about alternatives.

What should I do if I find my partner sleep-eating or sleepwalking?

Stay calm, remove obvious hazards like a hot stove, and gently guide them back to bed rather than shouting or restraining them. In the morning, tell them what happened so they can contact their prescriber, and call 911 if there is an injury or they cannot be woken.

Why don’t people remember sleep-driving or sleep-eating?

Zolpidem can block the brain from forming new memories while drug levels are high. The person may move and act, but the experience is never stored. Our article on Ambien and memory explains this in more detail.

Sources

• U.S. Food and Drug Administration. FDA adds Boxed Warning for risk of serious injuries caused by sleepwalking with certain prescription insomnia medicines (April 30, 2019).
• U.S. Food and Drug Administration. Drug Safety Communication on complex sleep behaviors (PDF).
• U.S. Food and Drug Administration. MedWatch safety alert: certain prescription insomnia medicines, new boxed warning.
• U.S. Food and Drug Administration. Drug Safety Communication on new label changes and dosing for zolpidem products (May 2013).
• U.S. Food and Drug Administration. AMBIEN (zolpidem tartrate) prescribing information.
• MedlinePlus, U.S. National Library of Medicine. Zolpidem drug information.
• American Academy of Sleep Medicine, Sleep Education. Sleepwalking.
• U.S. Food and Drug Administration. Reporting serious problems to FDA (MedWatch).

This article is written for general education about medication safety. It is not a diagnosis, a treatment plan, or a replacement for advice from the clinician who knows your health history. Decisions about starting, stopping, or changing any sleep medication should be made with your prescriber or pharmacist. If someone is injured, unresponsive, or in danger, call 911 or your local emergency number right away.