Ambien Sleepwalking and Complex Sleep Behaviors: Boxed Warning

Quick answer: Yes. Ambien (zolpidem) can cause sleepwalking and other “complex sleep behaviors,” such as sleep-driving, sleep-eating, and making phone calls while not fully awake, often with no memory afterward. In April 2019 the FDA required a boxed warning, its strongest warning format, on zolpidem, eszopiclone (Lunesta), and zaleplon (Sonata), along with a contraindication: people who have had a complex sleep behavior on one of these medicines should not take it again. The behaviors are rare, but they’ve caused serious injuries and deaths, and they can happen after the very first dose. If one happens, stop the medicine and contact your prescriber.

Most people take Ambien without incident. What makes this particular risk hard to deal with is that it’s invisible to the person experiencing it. You can’t feel yourself doing it, and you often don’t remember it. That’s why this guide is written in two voices: for the person taking the medicine, and for the partner, parent, or roommate who may be the one to notice. It explains what the FDA found, what complex sleep behaviors look like in real life, who’s most at risk, what to do if it happens, and how to make a home safer. It is educational information, not a replacement for advice from your own clinician.

What a boxed warning actually is

A boxed warning, sometimes called a “black box warning,” is the strongest warning the FDA can require on a prescription drug label. It appears at the top of the prescribing information inside a border, and it’s reserved for risks that are serious enough to affect whether and how a drug should be used. A contraindication goes a step further. It says the drug should not be used at all in a certain situation.

For zolpidem products, which include Ambien, Ambien CR, Edluar, Intermezzo, and Zolpimist, both now apply to complex sleep behaviors. The boxed warning tells prescribers and patients that these behaviors can cause serious injury or death. The contraindication tells prescribers not to give the medicine to anyone who has previously had a complex sleep behavior after taking it or a related drug.

What the FDA found in 2019

On April 30, 2019, the FDA announced the new warning after a safety review. According to the agency’s communication, it identified 66 cases of complex sleep behaviors with eszopiclone, zaleplon, and zolpidem over a 26-year period that resulted in serious injuries, including death. Twenty of those cases were fatal, and 46 involved serious non-fatal injuries. The large majority of the reports, 61 of 66, involved zolpidem, which is consistent with the fact that zolpidem is prescribed far more often than the other two.

Several points from the FDA’s findings are worth underlining:

It can happen after one dose. The behaviors have occurred in people with and without a prior history of them, and even at the lowest recommended doses.
Patients usually don’t remember. The agency noted that people typically had no memory of the event.
The count is a floor, not a ceiling. The 66 cases only include reports sent to the FDA or published in the medical literature, so there may be more the agency doesn’t know about.
The mechanism isn’t fully understood. The FDA stated plainly that how these medicines cause the behaviors isn’t completely known.
These behaviors appear more common with these three drugs than with other prescription sleep medicines.

The injuries described in the review ranged widely. The FDA’s data summary included events such as falls, burns, car crashes with the patient driving, and exposure-related harms. Rather than dwell on individual cases, the main takeaway for patients is simple: the risk is rare, but when it happens, the consequences can be severe because the person isn’t aware or making normal safety judgments.

What “complex sleep behaviors” look like

The phrase sounds clinical, but the reality is ordinary activity done in an unusual state. The person appears awake, may speak or move purposefully, and often looks “glassy” or unresponsive to normal cues. Examples include:

Sleepwalking: getting up, walking around the house, opening doors, even leaving the home.
Sleep-eating: preparing and eating food, sometimes strange combinations, sometimes dangerous (raw food, non-food items, using the stove).
Sleep-driving: getting in a car and driving, sometimes for a considerable distance, with no memory of it.
Sleep-talking and phone use: making calls, sending texts or emails, or posting online with no recollection.
Cleaning, cooking, or other household activity at night.
Aggressive or sexual behavior while not fully awake, which can be distressing for partners.
Online shopping or other financial actions that the person finds out about the next day.

The common thread is a brain in a mixed state: awake enough to move and act, asleep enough that memory-forming and judgment systems aren’t working. Our post on Ambien and memory loss explores why those memory gaps occur.

Why it happens, as far as anyone knows

The FDA says the underlying mechanisms aren’t completely understood, so any explanation should be offered with humility. Here’s the general picture that clinicians use to make sense of it.

Sleep isn’t one uniform state. The brain moves through stages, and parasomnias such as sleepwalking occur when parts of the brain wake while others remain in deep sleep. Zolpidem acts on the brain’s main inhibitory (GABA) signaling system, and it appears to alter the normal boundaries between sleep and waking in some people. The result may be a brain that gets up and acts, but without the parts that supervise safety and form memories.

Experts also note that the risk seems to rise when the sedative effect is deeper or more erratic, which is why the factors in the next section matter.

Who is at higher risk?

Anyone taking zolpidem can have a complex sleep behavior, including people who never had one before. But several factors are widely linked with higher risk, and the labeling specifically discusses some of them:

Alcohol and other sedatives

The Ambien label notes that risk for complex sleep behaviors increases with the use of alcohol and other central nervous system depressants. Combining Ambien with a drink, a benzodiazepine, an opioid, or sedating antihistamines stacks the effects. See can you drink alcohol on Ambien and Ambien drug interactions.

Doses above the recommended amount

Higher doses are associated with more adverse effects across the board. Taking an extra tablet because the first “didn’t work yet” is one of the most common ways people get into trouble.

Staying up after taking it

Zolpidem works quickly. If you take it and then keep watching television, scrolling your phone, cooking, or doing chores, you are awake while the drug is taking effect, which is exactly the situation in which unusual behavior and memory gaps tend to appear. The label says to take it immediately before bed.

Not enough time in bed

The label recommends seven to eight hours remaining before you need to be awake. Shortened sleep means the drug is still active when you’re woken or up.

Existing sleep disorders and sleep deprivation

A personal or family history of sleepwalking, sleep-eating, or other parasomnias, as well as untreated sleep apnea or severe sleep deprivation, can make sleep more fragile. Tell your prescriber about any of these before starting.

Women and older adults

Zolpidem clears more slowly in women, and older adults are more sensitive to sedatives. Both are reasons the recommended doses are lower for these groups.

Extended-release formulations

Because Ambien CR keeps more drug in the system later in the night, some people prefer to discuss formulation carefully. Both versions carry the boxed warning. Compare them in Ambien CR vs Ambien.

What to do if it happens to you or someone you live with

Step 1: Make the situation safe

If you find someone in the middle of an episode, don’t try to argue or shake them awake forcefully. Speak calmly, guide them gently back to bed, and keep hazards (stove, car keys, stairs, doors) out of reach. If they’re driving or in danger, call your local emergency number.

Step 2: Stop taking the medicine

The FDA’s guidance for clinicians is to tell patients to discontinue the medicine if they experience an episode of complex sleep behavior. Don’t take another dose “to see if it happens again.”

Step 3: Contact your prescriber

Call the clinician who prescribed the medicine, describe what happened, and ask how to stop safely, especially if you’ve been taking it nightly. Quitting suddenly after prolonged use can cause rebound insomnia. See Ambien withdrawal and rebound insomnia. The point is to stop the drug that caused the event while keeping the transition safe.

Step 4: Make sure it’s recorded

Ask that the event be documented in your medical record and that Ambien, and other drugs in the same group, be flagged. Because of the contraindication, you shouldn’t be prescribed zolpidem, eszopiclone, or zaleplon again if you’ve had a complex sleep behavior on one of them. Mention it to every provider and pharmacist.

Step 5: Seek medical care for injuries

If anyone was hurt, or you suspect an overdose or head injury, get medical care right away.

Step 6: Consider reporting it

The FDA urges patients and health professionals to report side effects with these medicines to its MedWatch program. Reports help the agency track safety problems.

For partners, parents, and housemates

You may be the first to see the signs, and you may notice things the person can’t. Consider these:

Signs in the morning: dishes out, food missing or half-prepared, doors unlocked, lights on, items moved, strange online activity, or car in a different position.
Signs at night: the person is up but seems unaware, slurred or odd speech, a blank look, or doesn’t respond normally.
What to say: tell the person calmly what you saw, without blame. They genuinely don’t remember.
What not to do: don’t ignore it as “just a funny story.” Don’t encourage another dose to see what happens.
What to do next: encourage them to contact their prescriber and to stop the medicine until they have.

If a loved one has been aggressive, driven, or put themselves in danger while under the medicine’s influence, treat it as a medical safety event rather than a character issue.

The household safety plan

If you take Ambien, or care for someone who does, a few changes can lower the odds that something goes wrong. These don’t replace stopping the medicine if an episode occurs. They’re protective layers while you’re using it as prescribed.

Bedroom

Take the tablet only once you are in bed and ready to sleep.
Keep your phone out of reach or in another room, with notifications silenced, so late-night texts and posts are less likely.
Clear the floor of cords and clutter.

Kitchen

Consider a stove-knob cover or an automatic shut-off device.
Avoid leaving tempting snacks or tools like knives and appliances out.
If sleep-eating is a concern, tell your clinician. It’s a reason to stop.

Doors and exits

Lock exterior doors, and consider alarms or chimes that alert others if a door opens.
Use a gate at the top of stairs if there’s a history of nighttime wandering.

Car and keys

Keep car keys in a place you can’t reach easily from bed, such as another room or a lockbox.
Never take Ambien if you may need to drive within the next seven to eight hours.

Weapons, medicines, and hazards

Store firearms unloaded and locked away, separate from ammunition.
Lock up other medicines, particularly sedatives and opioids, so a half-awake person can’t take more.

Pools, water, and heights

Secure pool access and keep balcony or roof doors locked.

Tell the people you live with

Make sure someone knows you take it, what the warning signs are, and who to call. If you live alone, consider whether the medicine is right for you, and talk this over with your prescriber.

Myths and facts

Myth	What’s actually true
“It only happens if you take too much.”	The FDA says it has occurred even at the lowest recommended doses and after a single dose, though higher doses and sedative combinations raise risk.
“If I didn’t have it the first time, I’m safe.”	Events can happen with or without a history of previous episodes.
“I was awake, so it was my choice.”	People in these states are not functioning normally and typically have no memory, so judgment and consent are not intact.
“It’s only sleepwalking, so it’s harmless.”	The FDA documented serious injuries and deaths, including from driving and falls.
“A different Z-drug is the safe swap.”	Eszopiclone and zaleplon carry the same boxed warning. See Lunesta vs Ambien and Sonata vs Ambien.
“I can take it again once I feel better.”	The contraindication says that someone who has had a complex sleep behavior shouldn’t be prescribed these medicines again.

What to use instead if Ambien is no longer an option

Losing access to one sleep medicine can feel alarming, but there are other routes. None is risk-free, and the right one depends on your symptoms and health:

Cognitive behavioral therapy for insomnia (CBT-I): widely recommended as a first-line treatment for chronic insomnia, with lasting benefits and no sleep-behavior risk from a drug. See natural remedies for deep sleep for related lifestyle steps.
A melatonin-receptor medicine: for example ramelteon. See Rozerem vs Ambien.
An orexin receptor antagonist: a newer class that works differently from Z-drugs. See our upcoming Ambien vs Belsomra comparison.
Treating the underlying cause: sleep apnea, pain, anxiety, depression, restless legs, or alcohol use can all drive insomnia.

Your clinician can help weigh these. Remember that other sleep medicines may have their own warnings, so ask about each one.

Pregnancy and other special situations

If you’re pregnant or breastfeeding, the decision about any sleep medicine requires extra care. Read Ambien in pregnancy and talk to your obstetric provider. If you have a history of sleepwalking, sleep-eating, or other parasomnias, a seizure disorder, or substance use disorder, tell your prescriber at the outset so the risk-benefit discussion reflects it.

Questions to ask your prescriber

Given my history, is a medicine in this class appropriate for me?
What is the lowest dose, and for how long should I use it?
What should I do on nights I can’t get a full seven to eight hours?
Do any of my other medicines or supplements raise this risk?
If I or someone I live with notices an episode, whom should we call, and how do I stop safely?
Is there a non-drug or non-Z-drug option that might fit me better?

Frequently asked questions

Does Ambien really cause sleepwalking?

Yes. The FDA has stated that eszopiclone, zaleplon, and zolpidem can cause complex sleep behaviors, including sleepwalking and sleep-driving, and added a boxed warning in 2019.

Can it happen after just one dose?

Yes. The FDA notes it can occur after a single dose and at the lowest recommended doses.

What is sleep-driving?

Driving while not fully awake, typically with no memory afterward. It is one of the most dangerous complex sleep behaviors.

How common is it?

The FDA describes these events as rare. It identified 66 serious cases over 26 years from reports and the literature, but notes there may be others. Because most people don’t remember, underreporting is likely.

Should I stop Ambien if I sleepwalk once?

The FDA directs that patients stop the medicine if they have an episode. Contact your prescriber for guidance on stopping safely.

Can I take Ambien again after a sleepwalking episode?

The label contraindicates use in people who have had a complex sleep behavior after taking these medicines, so prescribers shouldn’t give it again.

Does alcohol make it worse?

The label notes that the risk of complex sleep behaviors increases with alcohol and other CNS depressants. Avoid combining them.

Is Ambien CR safer than regular Ambien for this?

Both carry the same boxed warning. Neither is considered risk-free for complex sleep behaviors.

Do other sleep medicines cause this?

Lunesta and Sonata carry the same warning. The FDA said the behaviors appear more common with these three drugs than other prescription sleep medicines.

Who should I tell if it happens?

Your prescriber, your pharmacist, and the people you live with. You can also report it to the FDA’s MedWatch program.

The bottom line

The boxed warning on Ambien isn’t about a rare quirk. It’s about a pattern the FDA found serious enough to put in its strongest label language: people, often with no memory of it, getting up and doing things, sometimes dangerous things, while not fully awake. The risk is low for any one person, but it isn’t zero, it can appear after a single dose, and it rises with alcohol, other sedatives, higher doses, and staying up after taking the tablet. If you take Ambien, take it only in bed, allow a full night, skip alcohol and other sedatives, and make your home safer. If anything unusual happens, stop the medicine and call your prescriber. If you share a home with someone who takes it, pay attention to the signs, and don’t dismiss them.

Sources and further reading

Medical disclaimer: This article is for general education and isn’t a substitute for professional medical advice, diagnosis, or treatment. If you or someone else has been injured, or you suspect an emergency, call your local emergency number. Don’t start, stop, or change a prescription without consulting your healthcare provider.

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Ambien Sleepwalking and Complex Sleep Behaviors: The Boxed Warning