What Happens in an Overdose of Benzodiazepines

An overdose happens when a person takes more of a substance than their body can safely handle, and with benzodiazepines, the result is a body that slows down too far. These medicines are meant to calm the brain, slow its activity, relax muscles, and help a person sleep. In an overdose, that calming effect goes much too far. The brain becomes so quiet that it cannot keep the body awake, cannot keep breathing steady, and cannot keep the heart beating strongly enough. The person becomes deeply drowsy, then confused, then unresponsive, and without help, breathing can stop. This is not a gentle sleep. It is a medical emergency, and it can be fatal.

This article explains, in plain words, what happens in the body during a benzodiazepine overdose: how breathing, consciousness, the heart, and the rest of the body are affected, why mixing these medicines with alcohol or other calming substances makes the danger far worse, what the warning signs look like, what to do if you think someone has overdosed, and what recovery can look like afterwards. It is general information only, not individual medical advice. If you think someone has taken too much, call emergency services immediately and do not leave the person alone. Do not wait to see if they wake up on their own, and do not try to treat an overdose at home. Minutes matter, and getting professional help quickly is the single most important thing anyone can do.

What an Overdose Means for the Brain

Benzodiazepines work by boosting a chemical messenger in the brain called GABA, which slows brain activity down. At a normal prescribed amount, that slowing feels like calm and drowsiness. In an overdose, the slowing goes far beyond calm. The brain’s activity drops so low that the systems which keep a person awake, aware, and able to respond to the world around them begin to shut down. Thinking becomes confused and muddled first. A person may slur their words, struggle to follow a simple question, or say things that make no sense. Their movements become clumsy and uncoordinated, as if they are very drunk, even when they have not been drinking. They may stumble when they try to stand, drop things they are holding, or be unable to walk in a straight line.

As the overdose deepens, the person becomes harder and harder to wake. At first, they may respond to their name, or to a shake of the shoulder, but their answers are slow and unclear. Then they may only respond to a loud voice or a firm touch. Then they stop responding altogether, even to shouting or pain. This is not sleep. A sleeping person can be woken, and when they wake, they know where they are. A person in an overdose cannot be woken, and their brain is not resting. It is being suppressed so strongly that it cannot do the basic jobs it needs to do to keep the body alive. That is why an overdose is so dangerous, and why it is so different from simply taking a sleeping tablet and having a long night’s rest.

The brain also controls the body’s protective reflexes, and those reflexes fade in an overdose. A healthy person who vomits while lying down will cough and turn, clearing their airway. A person in a deep overdose may not cough at all, and vomit can slide into the lungs, blocking breathing and causing serious lung damage. A healthy person who feels cold will shiver and move to somewhere warmer. A person in an overdose may lie still in the cold for hours, without noticing. The loss of these reflexes is one of the reasons an overdose is so dangerous even when the person looks peaceful. They look as if they are sleeping, but their body has lost the ability to protect itself, and that loss can turn a survivable overdose into a fatal one in a very short time.

Breathing Slows Down, Then Stops

The most dangerous effect of a benzodiazepine overdose is on breathing. Breathing is controlled by the brain, which constantly monitors the level of carbon dioxide in the blood and tells the lungs to breathe faster or slower in response. Benzodiazepines suppress that control system. In an overdose, the brain sends weaker and weaker signals to the breathing muscles, and each breath becomes shallower and slower. A person who normally takes twelve to sixteen breaths a minute may drop to only a few slow, shallow breaths, with long pauses between them. Those breaths do not bring in enough oxygen, and they do not clear out enough carbon dioxide, so oxygen levels in the blood fall while carbon dioxide rises.

The signs of this are often visible if you know what to look for. The person’s chest may rise only slightly with each breath, or not at all for several seconds at a time. Their breathing may sound noisy, gurgling, or rattling, especially if vomit or saliva is partly blocking the airway. Their lips, face, or fingertips may develop a blue or grey tinge, which is a sign that oxygen is not reaching the tissues properly. Their skin may feel cold and clammy to the touch. These are all signs that breathing is failing, and they mean that emergency help is needed immediately, not in an hour, not after a phone call to a friend, but now.

If breathing slows too far, it can stop altogether. When breathing stops, oxygen stops reaching the brain, and brain cells begin to die within minutes. The heart, which depends on oxygen to keep beating, begins to slow and weaken. This is the point at which an overdose becomes fatal, and it can happen more quickly than people expect. A person who was talking, even confusedly, an hour ago can be unresponsive and barely breathing now, and a person who is barely breathing now can stop breathing altogether in the next few minutes. That speed is why waiting is so dangerous. An overdose does not always get worse in a neat, predictable line, and a person who seems stable can deteriorate suddenly. The only safe response to suspected overdose is to call emergency services at once and stay with the person until help arrives.

Consciousness Fades: Confusion, Unresponsiveness and Coma

One of the first things family and friends notice in an overdose is a change in consciousness, and it is often the change that tells them something is seriously wrong. The person may seem drunk, even though they have not been drinking, or they may seem unusually sleepy at a strange time of day. They may repeat themselves, forget what they were saying halfway through a sentence, or answer a question with something that has nothing to do with what was asked. Their eyes may look glazed or unfocused, and they may stare blankly without really seeing what is in front of them. They may be unable to remember where they are, what day it is, or what they have taken.

As the overdose progresses, the person becomes less and less responsive. They may not answer when spoken to, or they may mumble a few unclear words and then fall silent again. They may not react when their name is called loudly, or when their shoulder is shaken. Their body may go limp, their arms and legs heavy and loose, without any of the normal tension that a sleeping person’s body keeps. This limpness is a sign that the brain is no longer sending the usual signals to the muscles, and it is a serious warning sign. A person whose body has gone limp and who does not respond to shouting is not simply asleep. They are in a dangerous state, and they need emergency care.

In the most severe overdoses, the person slips into a coma, a state of deep unconsciousness from which they cannot be woken by any amount of shouting, shaking, or pain. A coma is not like sleep, and it is not like fainting. It is the brain shutting down to a level where it cannot keep the body safe on its own. A person in a coma cannot protect their airway, cannot regulate their breathing properly, and cannot tell anyone what is wrong. They need hospital care, often in an intensive care unit, where machines can support their breathing and where doctors can monitor their heart, their oxygen levels, and their brain activity around the clock. Some people recover fully from a coma caused by an overdose, especially if help arrives quickly, but others are left with lasting harm, and some do not recover at all. The difference is often measured in minutes, which is why the response to an overdose must be fast.

The Heart, Blood Pressure and Circulation

While breathing is the most immediate danger, the heart and circulation are also affected by an overdose, and they can make the situation worse in ways that are less obvious from the outside. Benzodiazepines lower blood pressure, and in an overdose, blood pressure can fall to a level where the brain, the kidneys, and other organs do not receive enough blood to work properly. A person may feel cold, their skin may become pale or clammy, and their pulse may become slow, weak, or irregular. At first, the pulse may race as the body tries to compensate, but as the overdose deepens, the heart often slows, and each beat becomes weaker.

A slow, weak pulse is a serious sign, because it means the heart is not pumping enough blood around the body. The brain, which needs a constant supply of oxygen-rich blood, is the first organ to suffer when circulation fails, and that is why a person in an overdose can deteriorate so quickly once their heart begins to slow. The kidneys, which filter the blood, can also be damaged when blood pressure stays low for too long, and that damage can last long after the overdose itself has passed. In very severe cases, the heart can stop altogether, a state called cardiac arrest, which is fatal without immediate resuscitation and hospital care.

It is worth understanding that the heart effects of a benzodiazepine overdose are often worse when other substances are involved, which is the subject of the next section, and they are also worse in people whose hearts are already weak, in older people, and in people with lung disease. A young, healthy person may survive an overdose that would be fatal for an older person with a heart condition, and a person who has taken a large amount may survive where a person who took less but also drank alcohol does not. The amount taken is not the only thing that matters. The person’s health, their age, what else they took, and how quickly help arrived all play a part, which is why no one should ever try to judge, by looking at a person, whether an overdose is serious enough to call for help. If an overdose is suspected, it is serious enough. Call emergency services.

Why Mixing With Alcohol and Other Sedatives Is So Dangerous

One of the most important facts about benzodiazepine overdose is that it is far more dangerous when these medicines are taken together with alcohol or with other substances that slow the brain down. Alcohol, like benzodiazepines, boosts the brain’s calming system and suppresses breathing. When the two are taken together, their effects do not simply add up. They multiply. A dose of benzodiazepines that might have made a person drowsy on its own can, with alcohol, make them unresponsive. A dose that might have slowed breathing a little can, with alcohol, stop breathing altogether. This is why so many fatal benzodiazepine overdoses involve alcohol as well, and why health guidance warns so strongly against drinking while taking these medicines.

The same danger applies to other calming substances, including some pain medicines, some sleeping tablets, and some drugs used without a prescription. Each of these substances slows the brain in its own way, and together they can push the brain’s activity down to a level where it cannot keep the body alive. A person may not realise how dangerous the combination is, because each substance on its own felt familiar and manageable. They may have taken their usual amount of benzodiazepines, and had their usual amount to drink, and felt fine many times before. But the body is not a machine that behaves the same way every day. Tiredness, illness, an empty stomach, a slightly larger amount than usual, or a change in the strength of what was taken can tip a familiar combination into a fatal one, without any warning.

This is also why it is so important, when calling for help, to tell the emergency services and the hospital staff everything the person may have taken, including alcohol and any other substances, even if that feels embarrassing or frightening. Doctors are not there to judge. They are there to save a life, and knowing what was taken helps them understand what is happening in the body and what support is needed. Hiding information, out of fear or shame, can delay the right care and make the outcome worse. If you are with someone who has overdosed, be honest about what you know, even if you are not sure. A partial answer is better than silence, and it may be the information that saves them.

Skin, Temperature, Vomiting and Choking

An overdose affects the whole body, and some of the signs are visible on the skin and in the body’s temperature. The skin often becomes cold and clammy, pale or grey, and it may feel damp to the touch even in a warm room. The lips and fingertips may turn blue, as already described, which is a sign of low oxygen. The body’s temperature can drop, because the brain’s temperature control is suppressed and the person is lying still, not moving, not shivering, and not seeking warmth. A low body temperature, on its own, can be dangerous, because it slows the heart further and makes it harder for the body to recover. A person found after hours lying on a cold floor may be dangerously cold as well as overdosed, and they need to be kept warm while waiting for help, without being moved roughly or given anything to eat or drink.

Vomiting is another serious danger in an overdose, and it is one that people often underestimate. A person who is deeply drowsy or unconscious cannot cough properly, cannot turn their head to clear their airway, and cannot protect their lungs from vomit. If they vomit while lying on their back, the vomit can flow into the windpipe and into the lungs, blocking breathing and causing a serious lung infection that can be fatal even if the overdose itself is survived. This is why, if a person is unconscious but still breathing, emergency guidance usually says to place them on their side, in the recovery position, so that vomit and saliva can drain out of the mouth instead of into the lungs. It is also why a person who has overdosed should never be given food or drink, and should never be made to vomit deliberately. Those actions can make choking more likely, not less, and they waste time that should be spent calling for help.

Seizures are not a common feature of a benzodiazepine overdose on its own, but they can occur, especially if the person has a history of seizures, if other substances were involved, or if the overdose is followed by sudden withdrawal. A seizure during or after an overdose is an emergency in its own right, and it needs the same urgent response: call emergency services, stay with the person, and do not try to hold them down or put anything in their mouth. The body in an overdose is already struggling to breathe, and a seizure makes that struggle worse. It is another reason why an overdose should never be treated as something that will simply pass with sleep, and why professional help is essential from the first moment it is suspected.

What To Do If You Think Someone Has Overdosed

If you think someone has taken too much of a benzodiazepine, the first thing to do is to call emergency services immediately. Do not wait to see if they wake up. Do not wait to see if they get better on their own. Do not try to walk them around, give them coffee, put them in a cold shower, or make them vomit. None of those things help, and some of them can make the situation worse. Coffee does not wake a brain that has been suppressed by an overdose. A cold shower does not restore breathing. Walking a drowsy person around can cause them to fall and injure themselves, and making them vomit can cause choking. The only action that reliably helps is getting professional medical help as quickly as possible.

While you wait for help, stay with the person. Do not leave them alone, even for a few minutes, because their condition can change suddenly. Try to keep them awake by talking to them, calling their name, and gently shaking their shoulder, but do not shake them roughly. If they are unconscious but breathing, place them on their side in the recovery position, so that their airway stays open and vomit can drain out. If they stop breathing, and you have been trained in resuscitation, begin it as you were trained, and follow the instructions of the emergency operator on the phone. If you have not been trained, the operator will talk you through what to do. Stay on the phone until help arrives, and follow the operator’s instructions exactly.

When the ambulance arrives, tell the crew everything you know: what the person took, how much, when they took it, whether they drank alcohol or took anything else, and whether they have any known health problems. If there are empty packets, bottles, or containers nearby, show them to the crew, because that information helps the hospital understand what happened. Do not worry about getting into trouble. Emergency services and hospital staff are there to save a life, not to punish anyone, and the information you give may be the difference between a full recovery and a lasting injury. If you are afraid, say so, but say it while you are also giving the information. Honesty, in that moment, is one of the most helpful things you can offer.

What Happens in Hospital and Afterward

When a person who has overdosed arrives at hospital, the first priority is always the same: keep them breathing, keep their heart beating, and keep oxygen reaching the brain. Doctors and nurses will monitor breathing, heart rate, blood pressure, and oxygen levels continuously, and they may give oxygen, put a tube into the airway to help breathing, or use a machine to breathe for the person until the medicine wears off. They will take blood tests to check for damage to the kidneys, the liver, and other organs, and to see what substances are in the body. They will keep the person under close observation, often for many hours, because the medicine can take a long time to leave the body, and a person who seems to be waking up can become drowsy again as the level in the blood changes.

The hospital stay can be frightening for the person and for their family, and it can last from a few hours to several days, depending on how severe the overdose was and whether any complications developed. If vomit entered the lungs, the person may need treatment for a lung infection. If the kidneys were damaged by low blood pressure, they may need extra care and monitoring. If the person was lying still for a long time, they may have muscle damage or pressure injuries that need treatment. None of these complications are a sign that the person did something unforgivable. They are the physical consequences of an overdose, and they are treated like any other medical problem, with care and without judgement.

After the immediate danger has passed, the person will usually be offered a conversation with a health professional about what happened and what support is available. This is not a lecture, and it is not a punishment. It is a chance to understand how the overdose happened, whether the medicine was being taken as prescribed or in a way that had become unsafe, and what can change to make another overdose less likely. Some people need help to stop using benzodiazepines safely, with medical support, because stopping suddenly after long use carries its own serious risks. Some people need support for anxiety, sleep problems, or low mood that led them to use the medicine in the first place. Some people need help with alcohol or other substance use. Whatever the cause, the support exists, and asking for it is a sign of strength, not weakness. Surviving an overdose is a second chance, and it is worth using well.

Who Is Most at Risk, and Why Overdose Happens

An overdose can happen to anyone who takes benzodiazepines, but some people are at greater risk than others, and understanding who they are helps explain why overdose happens at all. Older people are at higher risk, because their bodies clear the medicine more slowly, and their brains are more sensitive to its effects. A dose that a younger person tolerates can leave an older person deeply drowsy and unsteady, and more likely to fall, to become confused, or to stop breathing properly. People with lung disease, such as chronic bronchitis or emphysema, are also at higher risk, because their breathing is already weaker, and the medicine’s suppression of breathing can push it over the edge. People with liver or kidney problems clear the medicine more slowly, so it stays in the body longer and its effects last longer.

Children are at particular risk, because a small amount of a medicine meant for an adult can be a large overdose for a child. A single tablet, left within reach, can make a small child deeply drowsy, slow their breathing, and put their life in danger. That is why these medicines should always be stored securely, out of the reach of children, in their original packaging, and never shared with anyone else. Sharing a prescribed medicine with a friend or family member, even with good intentions, is dangerous, because the dose that is safe for one person may be an overdose for another, especially if that person is older, smaller, ill, or also drinking alcohol.

Overdose also happens, sadly, when a person takes more than they intended, often because they forgot they had already taken a dose, or because they felt the first dose had not worked and took another, or because they were drinking and their judgement was impaired. It happens when a person is in distress and takes extra tablets hoping to sleep or to escape anxiety, without realising how quickly the effects can build. And it happens when a person has developed tolerance, needing more of the medicine to feel the same effect, and takes a larger amount than their body can handle. None of these situations involves a person who set out to harm themselves. They involve ordinary people, in difficult moments, making a decision that turned out to be far more dangerous than they understood. That is why the information in this article matters: knowing the risks, in plain words, before a crisis, is the best protection against one.

My Take:

The thing I keep coming back to when I think about overdose is how ordinary it looks at the start. A person takes a tablet to sleep, or to calm their nerves, and nothing dramatic happens. They feel drowsy. They lie down. They look as if they are resting. And then, quietly, their breathing slows, their body goes limp, and they stop responding. There is no alarm, no warning sign that a stranger would recognise, just a person who seems to be sleeping more deeply than usual. That quietness is what makes overdose so dangerous. It does not announce itself. It arrives while everyone around is assuming that sleep is the safest thing a person can do, and by the time someone realises it is not sleep, minutes have already passed. I think that is the first thing anyone should understand: an overdose can look like sleep, and that is exactly why it kills.

I am struck, too, by how often overdose happens by accident, not by intention. A person forgets they already took a tablet and takes another. A person has a drink, and then another, and their judgement fades, and they take more than they meant to. A person is anxious, and desperate for sleep, and takes extra tablets hoping for rest, without understanding that the medicine does not work that way, that more does not mean better sleep, it means slower breathing. None of these people set out to harm themselves. They were tired, or worried, or forgetful, or drunk, and they made a decision in a moment that they would not have made in a clearer one. I do not think blame helps anyone here. What helps is information, given plainly, before the moment arrives, so that a person knows that doubling a dose is never safe, and that mixing the medicine with alcohol can turn a normal evening into an emergency.

The role of alcohol in this story cannot be overstated, and I want to say it as plainly as I can. Alcohol and benzodiazepines together are far more dangerous than either one alone. I know that many people drink while taking these medicines, and that they have done it many times without obvious harm, and that makes the warning easy to ignore. But the body does not behave the same way every day. A person who was fine last week can be in danger this week, because they were more tired, because they ate less, because they took a slightly larger amount, because their liver was working more slowly. The combination is a gamble, and the stakes are breathing and consciousness. If you take benzodiazepines, please do not drink with them. It is the simplest, clearest piece of advice in this whole article, and it is the one most likely to save a life.

I think about the people who find someone who has overdosed, because they are the ones who have to act in the worst moment, and they often have no training and no idea what to do. A partner who finds their loved one unresponsive in the morning. A parent who finds their child limp on the floor. A friend who realises, too late, that the person beside them is not just asleep. Those moments are terrifying, and the fear can freeze a person, or make them do the wrong thing, like trying to walk the person around, or giving them coffee, or waiting to see if they wake up. I would want every reader to know, before they ever need it, that the right thing to do is simple: call emergency services immediately, stay with the person, and do not leave them alone. You do not need to be a doctor. You do not need to know the dose. You only need to make the call, and to stay, and to tell the truth about what happened. That is enough, and it is everything.

There is a temptation, when writing about overdose, to focus only on the medical facts, the breathing, the heart, the coma. But the human cost goes far beyond the hospital, and I think it deserves to be named. A family that loses someone to an overdose does not only lose a person. They lose the future they imagined with them, and they gain a set of questions that may never be answered: could I have noticed sooner, could I have called earlier, could I have said something different? Those questions stay with people for years, and they are often heavier than the grief itself. The same is true for a person who survives an overdose and has to live with the knowledge that they came close to dying, and with the guilt of what they put their family through. Recovery from an overdose is not only physical. It is emotional, and it takes time, and it needs support, not silence.

I am honest about the fact that I do not think warnings alone are enough. People know, in a general way, that taking too much of a medicine is dangerous, and they still do it, because they are tired, or anxious, or in pain, or because they have done it before and been fine. What changes behaviour, in my view, is not a stronger warning, but a clearer understanding of what actually happens in the body, and a practical plan for what to do when things go wrong. That is why I have written this article in plain words, without jargon, and why I have spent so long on the signs to look for and the steps to take. If one reader, one night, recognises slow breathing and a blue tinge to the lips, and calls for help instead of waiting, then this article has done its job, and that is worth more than any number of warnings.

Children are the part of this subject that frightens me most, because they are entirely unprotected by their own judgement. A child does not know what a tablet is, or how dangerous it can be. They see something small and colourful, and they put it in their mouth, as children do. A single tablet, left on a bedside table, or in a handbag on the floor, can be enough to make a small child stop breathing properly. That is a terrifying thought, and it is also a preventable one. Keep these medicines locked away, out of reach, in their original packaging, and never, ever share them with anyone else, not even an adult who seems to need them. A medicine prescribed for you is prescribed for your body, your age, your health, and your history. For anyone else, it is a gamble with their life, and it is not a gamble anyone has the right to take on their behalf.

If you have survived an overdose, I want to say this to you directly: you are not a bad person, and you are not beyond help. An overdose does not define you, and it does not decide your future. What decides your future is what you do next, and the help you ask for. Talk to a health professional about what happened, honestly, without hiding anything. Ask about support for stopping safely, if that is what you need, and about support for the anxiety, the sleep problems, or the low mood that led you to take the medicine in the first place. You do not have to fix everything at once. You only have to take the first step, and then the next one, and the people whose job it is to help you will walk with you. Surviving is not the end of the story. It is the beginning of a different one, and it is a story worth writing well.

Finally, I would say this to anyone who has never taken benzodiazepines and never will: remember what you have read here, not for yourself, but for someone else. You may be the person who finds a friend unresponsive. You may be the person who notices that a family member is breathing too slowly. You may be the person who has to make the call. In that moment, you will not have time to look things up, and you will not have time to think carefully. You will have to act on what you already know. I hope what you know, after reading this, is that slow breathing, unresponsiveness, a limp body, cold clammy skin, and blue lips are an emergency, that the answer is to call for help immediately and stay with the person, and that doing that, quickly, can save a life. That knowledge is a gift you can carry for someone else, and it may be the most important thing you take from this article. I think it is also worth talking about storage, because so many overdoses, especially in children, come down to a tablet left in the wrong place. A bedside table, a handbag on the floor, a jacket pocket, a bathroom shelf that a small child can reach by climbing onto a stool. These are ordinary places, and they are dangerous places for a powerful medicine. I would ask anyone who takes benzodiazepines to keep them in a locked box or a high cupboard, in their original packaging, with the label intact, and to count them now and then, so that a missing tablet is noticed quickly. It takes a few seconds to lock a box, and those seconds can be the difference between a child who is safe and a child in an ambulance. That is not an exaggeration. It is the plain arithmetic of how little it takes to harm a small body.

Talking to teenagers about this matters too, and it is a conversation many parents avoid because it feels awkward. A teenager may be offered a tablet by a friend, at a party, or at school, and told that it will help them relax, or sleep, or feel good. They may not know what it is, or how strong it is, or that mixing it with alcohol can stop their breathing. I think the honest conversation is better than silence. Tell them, plainly, that these tablets are not sweets, that they slow breathing, that they are dangerous with alcohol, and that if a friend takes one and becomes unresponsive, the right thing to do is to call for help immediately, not to wait and hope, and not to worry about getting into trouble. A teenager who knows that will be far safer than one who has never heard the warning, and they may one day be the person who saves a friend’s life by making a phone call.

The conversation with a prescriber is another part of this story that I think deserves more attention. When a doctor prescribes a benzodiazepine, the patient has a right to ask questions, and the doctor has a duty to answer them honestly. How long will I take this? What happens if I take too much? What should I do if I forget a dose? Is it safe with alcohol? What are the signs that I am becoming dependent? Those are not difficult questions, and they are not rude questions. They are the questions of a person who wants to use a medicine safely, and any good doctor will welcome them. If you are prescribed one of these medicines, ask those questions before you leave the surgery. Write the answers down. Keep them with the medicine. That small act of asking can prevent a crisis that no amount of treatment afterwards can fully undo.

Aftercare is the part of an overdose that is easiest to forget, because once the person is awake and breathing normally, it feels as if the crisis is over. But the crisis is not over. The person who survived needs support, and the family who watched it happen needs support too. The survivor may feel ashamed, or frightened, or confused about what happened, and they may need time and talking support to make sense of it. The family may feel guilty, or angry, or relieved, all at once, and they may need help to talk about it without blame. A follow-up appointment with a doctor, a conversation with a counsellor, or a meeting with a support group can make the difference between an overdose that becomes a turning point and an overdose that is buried, unspoken, until it happens again. I would urge anyone involved to take that follow-up seriously, even when it feels uncomfortable, because silence after an overdose is one of the most dangerous things of all.

I also think about the bystanders, the people who were there and did nothing, not because they did not care, but because they did not know what to do, or because they were afraid. A friend who watched someone become drowsy and thought they were just tired. A partner who went to bed, assuming the other person would sleep it off. Those people often carry guilt for years afterwards, wondering if a phone call an hour earlier would have changed everything. I want to say to them, gently, that guilt is not the same as responsibility, and that not knowing is not the same as not caring. But I also want to say that the way to live with that guilt is to learn from it, and to make sure that next time, if there is a next time, you know what to do, and you do it without hesitation. Knowledge, shared plainly, is the only thing that turns a bystander into a lifesaver.

Frequently Asked Questions

What are the main side effects of benzodiazepines on overdose?

In an overdose, benzodiazepines can cause extreme drowsiness, confusion, slurred speech, clumsy movements, slow and shallow breathing, a slow or weak pulse, low blood pressure, cold clammy skin, a blue tinge to the lips, vomiting, and loss of consciousness. In severe cases, a person can slip into a coma, stop breathing, or suffer cardiac arrest. The exact effects depend on how much was taken, whether alcohol or other sedatives were also taken, and the person’s age and health.

How quickly can benzodiazepines affect overdose?

The effects of an overdose can begin within an hour of taking too much, and they can worsen quickly over the following hours. A person may seem drowsy at first, then become confused and unresponsive, and then breathe more and more slowly. Because the medicine can take time to reach its full effect, a person who seems stable can deteriorate suddenly, which is why waiting to see if they improve is dangerous and emergency help should be called at once.

Can the harm benzodiazepines causes to overdose be reversed?

Some of the harm from an overdose can be reversed if help arrives quickly, because hospital care can support breathing and circulation while the medicine leaves the body. Many people recover fully, especially when help comes early. But if breathing stops for too long, the brain can suffer lasting damage from lack of oxygen, and if vomit enters the lungs or blood pressure stays low for a long time, other organs can be harmed. The sooner help arrives, the better the chance of a full recovery.

Why does benzodiazepines affect overdose?

Benzodiazepines slow down brain activity by boosting the brain’s natural calming system. In an overdose, that slowing goes too far, and the brain can no longer keep a person awake, keep breathing steady, or keep the heart beating strongly. Because the brain controls breathing, consciousness, and circulation all at once, an overdose can affect all of them together, which is why it is so dangerous and why it needs emergency care.

When should someone seek help about benzodiazepines and overdose?

Help should be sought immediately, by calling emergency services, if anyone is suspected of having taken too much, even if they still seem awake. Do not wait for symptoms to get worse. Urgent help is especially needed if a person is very drowsy, confused, unresponsive, breathing slowly or shallowly, has a blue tinge to the lips, or has vomited while unconscious. A health professional should also be contacted afterwards, to talk about support and how to prevent another overdose.

Where can I learn more about benzodiazepines and overdose?

Start with the links in Sources below: the National Institute on Drug Abuse, the Mayo Clinic, and the NHS all cover benzodiazepines and overdose. For personal questions about benzodiazepines and overdose, a health professional is the right person to ask.

Sources

This article is general information only. It is not individual medical advice. If you are worried about your health, talk to a qualified health professional.