What Happens in an Overdose of Codeine
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An overdose of codeine is not like a bad night of sleep, even though it can look like one from the outside. A person who has taken too much codeine may simply seem very drowsy, very quiet, or deeply asleep. That quiet is exactly what makes it so dangerous. While the person lies still, their breathing can slow down, become shallow, and then stop for longer and longer gaps, until the body is no longer getting the oxygen it needs. The heart, the brain, and every other organ depend on that oxygen, and when the supply falls, damage can begin within minutes. This is why health authorities treat every suspected overdose as an emergency, and why waiting to see if the person wakes up on their own is one of the worst things you can do.
Codeine belongs to a group of drugs called opioids. In medical settings it has been used for pain and for coughs, but it is also a drug that people misuse, and even people who take it for a real medical reason can run into trouble if the amount creeps up. The body builds tolerance to codeine, which means that the same amount that once had a strong effect gradually has less effect, and the person may take more to feel the same thing. That slow climb is where much of the danger lies. The gap between the amount that makes a person feel relaxed and the amount that shuts down breathing is not wide, and it can narrow without warning when the person is tired, ill, or has taken something else at the same time. This article explains, in plain words, what happens in an overdose of codeine: how breathing slows, which signs to watch for, why tolerance misleads people, why mixing codeine with alcohol or other sedatives is so risky, what is happening inside the body, and what to do in the minutes that matter. It is general information only, not individual medical advice. If you think someone has taken too much codeine, call emergency services at once and stay with the person until help arrives.
What Codeine Is and Why Too Much Is Dangerous
Codeine works by acting on the brain and the nervous system. After it is swallowed, the body turns part of it into morphine, another opioid, and that is what produces the drug’s effects. It dulls pain, it can make a person feel calm or sleepy, and it slows down several of the body’s automatic functions. In small, controlled amounts under a doctor’s care, those effects are the point. In larger amounts, the same effects become the danger. The drug does not know the difference between a dose that eases pain and a dose that stops breathing. It simply does more of the same thing as the amount rises, and the body’s safety margin is smaller than most people realise.
One of the reasons codeine is easy to underestimate is that it is often found in familiar places. It has been in cough syrups and pain tablets for many years, and some people think of it as a mild drug because it is weaker than some other opioids. That thinking is misleading. A weaker opioid can still kill, and codeine has caused deaths in many countries, including in people who had taken it before without any problem. The risk does not only come from taking a huge amount at once. It can come from taking a little more than usual, day after day, until the total amount in the body builds up, or from taking the usual amount on a day when the body is weaker than normal, for example after a sleepless night, during an illness, or after drinking alcohol.
The body processes codeine through the liver, and people process it at different speeds. Some people convert codeine to morphine quickly, which means a normal-looking amount can have a much stronger effect on them than on someone else. This difference is invisible. You cannot tell by looking at a person how fast their body will process the drug, and they cannot tell either. That uncertainty is one more reason why there is no safe amount to experiment with, and why taking more than the amount a doctor prescribed, or taking codeine that was not prescribed for you, carries a real risk. A person who has used codeine many times can still have a bad reaction on a day when nothing else seems different.
Another point that people often miss is that codeine affects more than pain and mood. It slows the movement of the gut, which is why constipation is a common side effect. It can lower blood pressure, make a person feel dizzy when they stand up, and make it hard to think clearly. It can also suppress the cough reflex, which is useful when a cough needs calming but dangerous when the body needs to clear its airways. In an overdose, all of these effects grow stronger at the same time. The person becomes harder to wake, their breathing becomes slower and shallower, their skin may become pale or bluish, and their body temperature can drop. None of this happens because the drug has suddenly changed. It happens because the amount has passed the point the body can handle.
How an Overdose Slows Breathing
Breathing feels automatic, and most of the time it is. The brain constantly measures the amount of carbon dioxide in the blood, and when that amount rises, it sends a signal to take a breath. Codeine interferes with that signal. It dulls the brain’s response to carbon dioxide, so the brain waits longer before telling the body to breathe, and when it does, the breath is shallower than it should be. At first this may show up as slow, heavy breathing, or as long pauses between breaths. A person nearby might notice that the chest rises less often, or that there is a long silence between one breath and the next. In a deep overdose, the pauses grow longer, the breaths grow weaker, and then breathing can stop altogether.
This slowing of breathing is the main reason codeine overdoses kill. The brain needs a steady supply of oxygen to work, and it is the organ that suffers first when oxygen falls. Within a few minutes without enough oxygen, brain cells begin to die, and the damage cannot always be reversed even if the person is revived. The heart also needs oxygen, and as oxygen levels fall, the heartbeat can become slow and irregular, and blood pressure can drop. The body is not shutting down all at once in a dramatic way. It is quietly running out of air, and because the person is unconscious or barely conscious, they cannot help themselves. They cannot sit up, they cannot call for help, and they cannot tell anyone that they are in trouble.
Sleep makes this harder to spot, because a person who has taken too much codeine often looks as if they are simply asleep. They may snore loudly, or make gurgling sounds, or breathe in a strange, uneven pattern. Family members sometimes think the person is sleeping off the drug and will wake up in the morning. In a real overdose, the morning may not come. Loud snoring, gurgling, or a pause in breathing that lasts more than a few seconds is not normal sleep. It is a sign that the airway may be partly blocked or that the brain is no longer driving breathing properly. A person who cannot be woken by shaking them or calling their name loudly is not in normal sleep, and they need emergency help right away.
The position of the body matters too. A person who is deeply drowsy and lying on their back can have their tongue fall back and block the airway, or can choke if they vomit. This is one reason first aid guidance often talks about putting an unconscious person who is still breathing on their side, in the recovery position, while waiting for help. It does not fix the overdose, but it can keep the airway open and reduce the risk of choking. It is not a substitute for calling emergency services, and it should never be used as a reason to wait and see. The only thing that reverses an opioid overdose is emergency medical treatment, and the sooner it arrives, the better the chances.
The Warning Signs People Miss
The warning signs of a codeine overdose are often missed because they develop gradually and because they look like ordinary tiredness. A person may seem unusually sleepy, hard to wake, or confused. They may speak slowly, slur their words, or not make sense. Their pupils, the black centres of the eyes, may become very small, like pinpoints. Their skin may feel cold and clammy, or look pale, grey, or bluish around the lips and fingertips. Their breathing may be slow, shallow, or irregular. Any one of these signs on its own might be explained away, but together, especially after codeine has been taken, they point to an emergency.
Friends and family often notice the change before the person does, because the person is too drowsy to notice anything. A partner may notice that the person fell asleep in the middle of a conversation, or that they could not be woken for dinner. A parent may notice that their child is breathing strangely in their sleep. A colleague may notice that someone seems confused and unsteady at work. These observations matter, and they should be acted on quickly. If you are unsure whether someone is in danger, it is far better to call for help and be wrong than to wait and be right too late. Emergency services would rather attend a false alarm than arrive after the damage is done.
One of the most dangerous moments is when a person seems to improve slightly and then gets worse again. Codeine can stay in the body for hours, and its effects can last longer than the person expects. Someone who wakes up briefly, says they are fine, and falls asleep again is not out of danger. The drug is still in their system, and breathing can slow again as they drift back into deep sleep. This is why a person who has taken too much codeine should not be left alone, even if they seem better for a while. They need to be watched, and they need medical assessment, because only a health professional can judge whether the drug has cleared enough for them to be safe.
Why Tolerance Misleads
Tolerance is one of the most misunderstood parts of codeine use, and it is behind many overdoses. When a person takes codeine regularly, the body adapts. The brain becomes less sensitive to the drug, so the same amount produces less pain relief, less calm, and less of the pleasant feeling the person is seeking. To get the same effect, the person takes more. This feels logical from the inside. It feels like the drug has stopped working and the dose needs adjusting. What the person often does not realise is that tolerance does not grow evenly for every effect of the drug. Tolerance to the pleasant effects can grow faster than tolerance to the effect on breathing. That means a person can take a larger amount to chase the feeling they used to get, while their breathing is still just as vulnerable as it was at the start, or even more so.
There is another trap with tolerance. If a person stops using codeine for a while, even for a few days, their tolerance falls. The body starts to reset. If they then go back to the amount they were taking before the break, that amount can now be far too much for them. This is a common pattern after a period in hospital, after a holiday, after a time when the drug was hard to get, or after a short attempt to cut down. The person remembers the old amount as safe because they took it many times before, but their body is no longer the same body that took it. The old dose becomes an overdose dose, and the person has no way of knowing until it is too late. Health workers see this pattern again and again, and it is one of the saddest kinds of overdose, because the person was not trying to take a risk. They were simply going back to what used to be normal.
Tolerance also changes how a person judges danger. Someone who has taken codeine many times without a serious problem can start to believe they know their limit. They may think that because they felt fine last week, they will feel fine this week, and that a slightly larger amount is harmless. But the body is not a machine with a fixed limit. How it handles codeine changes with sleep, food, illness, stress, and other drugs. A dose that was fine on a rested day can be dangerous on a day when the person is exhausted or unwell. The feeling of being in control is real, but it is not proof of safety. It is the drug and the habit working together to make risk feel familiar, and familiarity is not the same as safety.
The only honest way to think about tolerance is that it makes the drug more dangerous, not less. It pushes the amount up, it narrows the margin between feeling the effect and stopping breathing, and it creates a false sense of experience. A person who has used codeine for a long time is not safer than a new user. In many ways they are in more danger, because they are taking larger amounts, they are more likely to mix codeine with other substances, and they are more likely to ignore warning signs that a new user would find frightening. If the amount keeps rising, or if the person feels they need more and more just to feel normal, that is not a sign that the drug is working. It is a sign that the body is becoming dependent, and that the risk of an overdose is growing.
Mixtures That Turn Deadly
Codeine on its own can cause an overdose, but many of the worst overdoses involve a mixture. The most dangerous combination is codeine with alcohol. Alcohol is also a sedative. It also slows breathing, dulls the brain, and makes a person drowsy. When the two are taken together, their effects do not simply add up. They strengthen each other, so the combined effect on breathing can be far greater than either drug would cause alone. A person who might have survived the codeine alone, or the alcohol alone, can stop breathing when the two are combined. This is why health guidance is so clear that alcohol and opioids should never be mixed, and why so many overdose deaths involve both.
Other sedatives carry the same danger. Sleeping tablets, anxiety medicines, and some antihistamines all make a person sleepy and slow their breathing. Some people take them together with codeine without thinking, perhaps to help them sleep, or to calm their nerves, or because they were prescribed at different times by different doctors who did not know about each other. The result can be a level of sedation that none of the drugs would have caused on its own. Even over-the-counter medicines can add to the risk, which is why it matters to tell a doctor or pharmacist about everything you are taking, including medicines bought without a prescription and herbal remedies.
Another common mixture is codeine with other opioids, or codeine with cough syrups and pain tablets that already contain codeine or a similar drug. A person may take a prescribed tablet, then take a cough syrup, then take another painkiller, without realising that each one is adding more of the same kind of drug to the body. The total amount creeps up without any single dose looking large. This is especially risky when medicines are shared between family members, or when a person takes a medicine that was prescribed for someone else. The label may say one thing, but the person’s body, weight, health, and tolerance are different from the person the medicine was meant for.
The message here is simple and worth repeating: mixing makes an overdose more likely, harder to predict, and harder to treat. If you take codeine, do not drink alcohol with it, do not add sleeping tablets or anxiety medicines unless a doctor who knows your full history has said it is safe, and do not take extra painkillers or cough medicines without checking what is in them. If someone you know has mixed codeine with alcohol or another sedative and is now hard to wake, do not wait to see if they sleep it off. Call emergency services immediately, and tell the responders exactly what was taken, as best as you can. That information can save a life, because it tells the medical team what they are dealing with.
What an Overdose Does to the Body
During an overdose, the whole body is affected, not just breathing. As oxygen levels fall, the brain is the first organ to suffer, and the damage can be permanent. Brain cells begin to die within minutes of severe oxygen loss, and the parts of the brain that control memory, thinking, and movement are especially vulnerable. A person who survives an overdose may wake up with confusion, memory problems, or difficulty speaking and moving, and some of those problems can last for weeks, months, or longer. This is one of the reasons an overdose is not simply a bad night that ends when the person wakes up. Even survival can come with a cost that lasts.
The heart is also under strain. As oxygen falls, the heartbeat slows and becomes irregular. Blood pressure drops, and the heart muscle itself gets less oxygen, which can lead to a heart attack or to the heart stopping altogether. The lungs can fill with fluid, a condition that makes breathing even harder and can develop hours after the overdose began. The kidneys, which filter waste from the blood, can also be damaged when blood pressure falls and oxygen is low. In severe cases, muscles can break down and release substances that further damage the kidneys. The body is a connected system, and when breathing fails, every part of it feels the effect.
There is also the risk of injury while the person is unconscious. A person who collapses may hit their head, or may lie in one position for hours, cutting off blood flow to a limb and causing muscle damage. If they vomit while unconscious and lying on their back, they can breathe the vomit into their lungs, which can cause a serious infection and further breathing problems. These injuries are not caused by codeine directly, but they are caused by the deep unconsciousness that codeine produces, and they are part of why an overdose is so dangerous even when the person is found quickly.
Recovery after an overdose is not always quick or complete. Some people wake up in hospital and feel better within a day. Others need days of care, including help with breathing, treatment for low blood pressure, and monitoring for complications. The drug can stay in the body for many hours, and its effects can return after an initial improvement, which is why hospital staff watch overdose patients for a long time before sending them home. A person who leaves hospital too early, or who is taken home by family without medical assessment, can get worse again. An overdose is a medical emergency from start to finish, and it needs medical care from start to finish.
Minutes That Decide Everything
When someone has taken too much codeine, the minutes before help arrives matter more than most people realise. The first and most important step is to call emergency services immediately. Do not wait to see if the person wakes up, do not try to make them vomit, and do not give them food, drink, or coffee. Do not put them in a cold shower or try to walk them around. None of these things reverses an overdose, and some of them can make things worse. The person needs medical treatment, and the fastest way to get it is to call for it and to stay on the phone, following the instructions the operator gives you.
While you wait, stay with the person. Try to wake them by calling their name loudly and shaking their shoulders gently. If they do not respond, check their breathing. Watch their chest to see if it rises, and listen and feel for breath on your cheek. If they are breathing but unconscious, put them on their side in the recovery position, so their airway stays open and vomit can drain out of the mouth instead of going into the lungs. Keep them warm with a blanket or coat, and stay with them until help arrives. If they stop breathing, the emergency operator may guide you through rescue breathing or chest compressions. Follow their instructions carefully, even if you have never done it before. Your hands and your calm can keep oxygen going to the brain until professionals arrive.
When the medical team arrives, tell them everything you know: what was taken, how much, when, and whether alcohol or other medicines were involved. Bring the packets, bottles, or containers if you can do so safely. This information helps the team decide on treatment, which may include a medicine that reverses the effects of opioids, and oxygen to support breathing. The reversing medicine works quickly, but its effect can wear off before the codeine has left the body, so the person may need more than one dose and will need to be watched in hospital. That is normal, and it is why the person should not leave hospital early or refuse further care.
After the emergency, the person needs support, not judgement. An overdose is often a sign that someone is struggling, whether with pain, with dependence, or with life itself. The days after an overdose are a good time to talk to a doctor or a support service about what happened and what help is available. That conversation can be hard, but it can also be the start of a change. Many people who survive an overdose say later that it was the moment they realised how close they came to dying, and how much they still had to live for. If you are the person who called for help, you did the right thing. You gave someone a chance they might not have had without you, and that matters more than anything else you could have done that day.
My Take:
I want to be direct about this, because an overdose is not a subject for soft words. Codeine can kill, and it kills quietly. It does not announce itself with pain or panic. It puts a person to sleep, slows their breathing, and lets the body run out of oxygen while everyone nearby thinks the person is simply resting. That quietness is what frightens me most about it. A drug that caused violent pain would scare people away. A drug that feels like sleep does not, and that is why people underestimate it until it is too late. If this article does one thing, I hope it makes the quietness itself the warning. A person who cannot be woken is not sleeping. They are in danger, and they need help now.
I also think tolerance is the part of this story that is least understood, and it frustrates me that it is not talked about more. People hear the word tolerance and think it means they are getting used to the drug, as if that makes them safer. In reality, tolerance is the body adapting in a way that pushes the dose up while the risk stays high. The person feels less effect, so they take more, and the gap between the amount they want and the amount that stops their breathing gets smaller. It is a slow trap, and it works because each step feels small. Nobody decides one morning to take a dangerous amount. They take a little more than last week, and then a little more than that, and one day the little more is too much. If you recognise that pattern in yourself or in someone you love, take it seriously. It is not a sign of strength or experience. It is a sign that the risk is growing.
The mixing of codeine with alcohol is the part that angers me, because it is so preventable. Alcohol and codeine are both easy to get, both common in ordinary homes, and both feel familiar. People drink a little, take a tablet, and think nothing of it, because each one on its own has felt fine before. But together they are a different thing altogether. They both slow breathing, they both dull the brain, and together they can stop breathing in a way neither would do alone. I wish every packet of codeine carried a warning that was impossible to miss, and I wish every person who drinks knew that alcohol and opioids are a combination that has killed people who were not trying to die. It is not about blame. It is about a fact that too many people learn too late.
I think about the people who find someone in an overdose, because they are the ones who have to make the decision in the moment, and that decision is terrifying. You are looking at someone you love, or someone you barely know, and they will not wake up. Your first instinct may be to wait, to hope they will come round, to avoid making a fuss or calling an ambulance. I understand that instinct, and I want to say clearly that it is the wrong one. Calling for help is never a fuss. It is the only useful thing you can do, and it is far better to call and be told the person is fine than to wait and discover they are not. Emergency services deal with these calls every day. They will not judge you. They will help you, and they will guide you through what to do while you wait. If you remember one thing from this article, remember this: call early, stay with the person, and do not leave them alone.
The idea that a person can sleep off an overdose is one of the most dangerous beliefs I know, and I want to challenge it directly. Sleep is the body’s way of resting and repairing itself. An overdose is the body’s way of shutting down. They look similar from the outside, and that similarity kills people. A person in a normal sleep breathes regularly, responds to a loud voice or a shake, and wakes up feeling rested. A person in an overdose breathes slowly or irregularly, does not respond, and may not wake up at all. If you are not sure which one you are looking at, treat it as an emergency. Shake them, shout their name, watch their chest. If they do not wake, call for help. You are not overreacting. You are doing exactly what a caring person should do.
I am also honest about the fact that surviving an overdose does not mean the danger is over. The body can be damaged in ways that take time to show, and the drug can still be in the system for hours after the person seems better. That is why hospital care matters, and why leaving early is risky. I know hospitals are frightening, and I know some people worry about what will be written down or who will be told. But the medical team is there to keep the person alive, not to punish them, and the monitoring they provide is the difference between a full recovery and a second crisis at home. If someone you love has survived an overdose, stay with them through the hospital stay, ask questions, and make sure they are not sent home before they are ready. Your presence matters, and your insistence on proper care matters too.
What troubles me most is how ordinary the path to an overdose can look. It does not always start with someone seeking a thrill. Sometimes it starts with pain, with a cough that would not stop, with a prescription that helped at first and then stopped helping. Sometimes it starts with stress, with sleepless nights, with a person reaching for something to help them cope. There is no single kind of person who overdoses, and there is no single story. That is why I do not think judgement helps anyone here. The person who took too much codeine may have made a mistake, or may have been in pain, or may have been struggling in ways you cannot see. What they need now is help, not a lecture. The lecture can come later, if it is needed at all, and it will be far more useful when the person is alive to hear it.
I think the conversation after an overdose is as important as the emergency itself, and I wish more families had it. Once the person is safe, once the immediate danger has passed, there is a window when change is possible. The person has seen how close they came to dying. Their family has seen it too. That shared shock can be the start of an honest talk about what is happening, why the drug is being used, and what support is available. It can also be the moment when everyone goes back to pretending nothing happened, and the pattern continues. I would urge families not to let that window close. Talk to a doctor, talk to a support service, talk to each other. You do not need to have all the answers. You need to start the conversation, and to keep it going, because the next overdose may not have a happy ending.
If you are someone who uses codeine, I would ask you to think honestly about the amount you are taking and whether it has crept up over time. Are you taking more than you used to? Are you taking it more often? Do you feel unwell or anxious when you do not take it? Do you mix it with alcohol or with sleeping tablets? These are not easy questions, and answering them honestly takes courage, but they are the questions that can save your life. If the answer to any of them is yes, talk to a doctor. You do not have to stop on your own, and you do not have to explain everything in one visit. You can start by saying that you are worried about the amount you are taking, and a good doctor will take it from there. Asking for help is not weakness. It is the most sensible thing a person can do.
Finally, I want to say something to the people who love someone who uses codeine. You may feel helpless, frightened, or angry, and all of those feelings are understandable. You may have tried to talk to the person and been pushed away. You may have watched them change and felt powerless to stop it. I would say this: learn the signs of an overdose, keep the emergency number where you can find it, and know what to do if the worst happens. That knowledge is not a substitute for the longer work of helping the person get support, but it is the thing that can save their life on the worst day. And on the ordinary days, keep talking, keep caring, and keep the door open. People recover when they feel that someone is still there for them, even after they have made mistakes. Your patience, your honesty, and your willingness to act in an emergency may be the reason someone gets a second chance.
I also think about the difference between knowing the facts and acting on them, because in an overdose the gap between the two can be fatal. Most people who live with someone who uses codeine have heard, at some point, that opioids can slow breathing. They may have read a warning on a packet, or heard it from a doctor, or seen it in the news. Yet when the moment comes, when the person beside them will not wake up, many people freeze. They tell themselves it is probably nothing, that the person is just tired, that calling an ambulance would be an overreaction. I understand that freeze, because it comes from a very human place. We do not want to cause trouble, we do not want to be wrong, and we do not want to admit that something terrible is happening in our own home. But an overdose does not wait for us to feel ready. It moves forward minute by minute, and every minute of waiting is a minute in which the brain is getting less oxygen. The knowledge only helps if it turns into a phone call, and the phone call only helps if it happens early.
There is another thing I wish people understood, which is that an overdose can happen without any intention to take too much. The word overdose makes many people think of someone deliberately taking a huge amount, perhaps to end their life, or to chase a stronger high. That does happen, but it is not the whole story, and it is not even the most common story. Far more often, an overdose happens to someone who took a little more than usual because the usual amount had stopped working, or who took their normal amount on a day when they had also had a drink, or who took two different medicines without realising both contained the same kind of drug. These are ordinary mistakes, made by ordinary people, and they can have the same result as a deliberate act. I think it matters to say this plainly, because shame keeps people silent. If a family believes an overdose must mean something shameful, they are less likely to talk about it, less likely to ask for help, and more likely to hide the next warning sign. The truth is simpler and kinder: a body can be overwhelmed by codeine for many reasons, and none of them makes the person a bad person.
I would also ask readers to think about the people who prescribe and sell codeine, and about the responsibility that comes with it. A doctor who prescribes codeine should explain, in clear words, how much to take, how often, for how long, and what to do if the pain does not ease. A pharmacist should ask whether the person is taking anything else, and should warn them about alcohol. A family member who shares their own medicine with someone in pain may mean well, but they are taking a risk with a drug that was measured for a different body. None of this is about blaming doctors or pharmacists, who do difficult work and who save lives every day. It is about recognising that codeine is not a harmless household remedy, even though it has been treated like one for a long time. It is a powerful drug, and powerful drugs need clear instructions, honest warnings, and respect. If you are given codeine, ask questions. Ask how long you should take it, ask what to avoid, and ask what to do if you feel unusually sleepy. Those questions take a minute, and they can prevent a tragedy.
Finally, I want to return to the person at the centre of this, the one who took the codeine. If that person is you, and you are reading this because you are worried, I want you to know that worry is a useful feeling. It means you have noticed something, and noticing is the first step towards changing it. You do not need to fix everything today. You do not need to have a perfect plan. You need to take one step, and the simplest step is to tell someone: a doctor, a pharmacist, a friend, a family member. Tell them how much you are taking, and how you feel. That conversation may be uncomfortable, but it is far less uncomfortable than an overdose, and it is the conversation that gives you a future. You are not beyond help, you are not a lost cause, and you are not alone in this. Many people have been where you are, and many of them have found a way through, with support, with time, and with honesty. I hope you find yours, and I hope you find it before the drug makes the decision for you.
Frequently Asked Questions
How soon can a body that stops responding appear after using Codeine?
It can appear very quickly, sometimes within an hour of taking too much, and sometimes after a larger amount has built up over hours. The exact timing depends on how much was taken, whether alcohol or other sedatives were also taken, and how the person’s body processes the drug. In general, the first signs are unusual drowsiness, slow or shallow breathing, and difficulty waking the person. These signs should be treated as an emergency straight away, not watched to see if they pass.
Can Codeine really cause breathing that slows dangerously?
Yes, it really can, and slowed breathing is the main reason codeine overdoses are fatal. Codeine dulls the brain’s signal to breathe, so breaths become slower, shallower, and further apart. As oxygen levels fall, the brain and heart are starved of oxygen, and breathing can stop altogether. This can happen even in people who have taken codeine before without a serious problem, especially if the dose was higher than usual or mixed with alcohol or another sedative.
Who is most at risk of minutes that decide everything from Codeine?
The risk is highest for people who take larger amounts, people who mix codeine with alcohol or sleeping medicines, people who have recently returned to codeine after a break and gone back to their old dose, and people whose bodies convert codeine to morphine quickly. Older people, people with breathing problems, liver problems, or other health conditions, and teenagers are also at higher risk. But an overdose can happen to anyone who takes too much, so no one should assume they are safe.
What should I do if Codeine is causing a body that stops responding?
Call emergency services immediately and stay with the person. Try to wake them by calling their name loudly and shaking their shoulders. If they are breathing but unconscious, put them on their side in the recovery position to keep their airway open. Do not try to make them vomit, do not give them food or drink, and do not leave them alone. Tell the medical team what was taken, how much, and when, and bring the packets or bottles if you can.
Is help that arrives too late from Codeine dangerous?
Yes, delay is very dangerous, because the brain begins to suffer within minutes when oxygen levels fall. The longer breathing is slow or stopped, the greater the risk of permanent brain damage, heart damage, or death. Even a delay of a few minutes can make a real difference. This is why the advice is always to call for help at the first sign of trouble, rather than waiting to see if the person improves on their own.
Does collapse without warning from Codeine go away after stopping?
Some effects, such as drowsiness and slowed breathing, ease once the drug leaves the body and the person receives medical care. But an overdose can leave lasting harm, including brain damage from lack of oxygen, heart or kidney problems, or injuries suffered while unconscious. Recovery takes time, and some effects may not fully go away. The person needs medical assessment after an overdose, and support to avoid it happening again, even if they feel better.
Sources
- National Institute on Drug Abuse — https://nida.nih.gov/research-topics/opioids
- U.S. Drug Enforcement Administration — https://www.dea.gov/drug-information
- Mayo Clinic, Drug addiction — https://www.mayoclinic.org/diseases-conditions/drug-addiction/symptoms-causes/syc-20365112
- World Health Organization, Substance abuse — https://www.who.int/health-topics/substance-abuse
- NHS, Drug addiction: getting help — https://www.nhs.uk/live-well/addiction-support/drug-addiction-getting-help/
This article is general information only. It is not medical advice. If you are worried about your health or about someone else, speak to a qualified health professional.
