What Does Morphine Do to Your Brain
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Morphine is a powerful opioid, and its name is familiar to most people, even if they have never taken it. It is used in hospitals for severe pain, and it is also used outside medical care, where its risks are far greater. In both settings, one thing is clear: morphine does not only act on pain. It acts on the brain itself, changing how a person thinks, remembers, pays attention, and makes decisions. Those changes are not a side note. For many people, they are the most disruptive part of the drug, because they touch every part of daily life, from work to conversation to safety.
This article explains, in plain words, what morphine does to the brain: how it works on the brain’s signalling systems, why it makes thinking feel foggy and slow, how it affects memory and learning, why judgement and risk-taking change, how mood is affected, and what happens to the brain with regular use over months and years. It is general information about side effects and harms, not individual medical advice, and it does not give instructions for using morphine. If you are worried about your own health, or about someone you care about, a qualified health professional is the right person to talk to.
How Morphine Acts on the Brain
The brain runs on chemical signals. Cells pass messages to each other using chemicals called neurotransmitters, and those messages control everything from pain to mood to attention. Morphine works by attaching to docking points in the brain called opioid receptors, which are part of the body’s natural pain-control system. When morphine locks onto those receptors, it changes the messages that are sent. Pain signals are dampened, which is why the drug is used for severe pain in medical care. But the same receptors are involved in reward, breathing, alertness, and thinking, so the effect spreads far beyond pain.
One of the first things morphine does is to slow the brain down. Messages travel more slowly, reactions take longer, and the world feels a little further away. This is not the same as feeling relaxed after a good night’s sleep. It is a chemical slowing, and it can make ordinary tasks — following a conversation, reading a page, crossing a road — feel harder than they should. A person may feel drowsy, they may nod off at odd moments, and they may find it hard to stay awake through a film or a meal. That drowsiness is a direct effect on the brain, and it is one of the most common reasons people who take morphine find daily life difficult.
Morphine also triggers the brain’s reward system, releasing a chemical called dopamine. Dopamine is the chemical that makes pleasant things feel rewarding, and morphine pushes it far harder than everyday pleasures do. That rush of reward is part of why morphine can feel so good in the moment, and it is also part of why it is so addictive. The brain learns very quickly that morphine brings a powerful reward, and it starts to want that reward again. Over time, the brain adjusts to the drug, producing less of its own dopamine and becoming less sensitive to normal pleasures. Food, music, and time with family may start to feel flat by comparison, and that flattening is a brain change, not a lack of gratitude or effort.
Thinking Becomes Foggy and Slow
The most common complaint from people who use morphine regularly is a feeling that their thinking has become foggy. They describe it in different ways: a cloud over the mind, a sense of being half-asleep while awake, a feeling that thoughts are moving through treacle. Whatever words they use, the experience is similar. It takes longer to understand what someone has said. It takes longer to find the right word. It takes longer to work out what to do next.
This fog is not imaginary, and it is not a sign of low intelligence. It is the result of morphine slowing the brain’s processing speed. Tests that measure how quickly people can respond to a signal, how quickly they can sort information, and how quickly they can switch from one task to another all show the same pattern: people under the influence of opioids are slower, and they make more mistakes. The mistakes are often small — a wrong turn, a forgotten appointment, a sentence that trails off — but they add up, and they make life harder in ways that are easy to miss from the outside.
Concentration is part of the same problem. Paying attention requires the brain to hold a single thread and follow it, filtering out everything else. Morphine weakens that filtering. A person’s attention drifts, they lose the thread of a conversation, they start a task and forget what they were doing halfway through. They may read the same paragraph three times and still not take it in. For a student, that makes study almost impossible. For a worker, it makes a shift feel endless. For a parent, it makes it hard to follow a child’s story or to help with homework. The fog is not just a feeling. It is a real loss of the ability to focus, and it affects the things that matter most.
It is important to say that this fog does not always lift quickly when the drug wears off. With regular use, the brain adapts to the constant presence of morphine, and the fog can become a background state rather than a temporary effect. A person may feel foggy even in the morning, before they have taken anything, because their brain has adjusted to a new, slower normal. That is one of the reasons people who use morphine for a long time often say they cannot remember what clear thinking felt like. The change has been so gradual that they have forgotten the difference.
Memory and Learning Suffer
Memory is one of the brain’s most delicate jobs, and it is one of the first to suffer when morphine is used regularly. Forming a new memory requires the brain to pay attention, to encode what it has noticed, and then to store it in a way that can be found again later. Morphine interferes at each of those stages. If attention is drifting, the memory is never properly encoded in the first place. If the brain is drowsy, the storage is weak. If the person is foggy the next day, the memory is hard to retrieve.
In practice, this looks like a series of small, frustrating failures. A person forgets what they were told an hour ago. They forget an appointment they wrote down. They forget a name they have known for years. They walk into a room and cannot remember why they went there. They start to rely on notes and reminders for things they used to remember easily, and even the notes do not always help, because they forget to look at them. None of these failures is dramatic on its own, but together they make a person feel unreliable, and they make other people start to see them as unreliable too.
Learning new skills is affected in the same way, and often more severely. Learning requires repeated practice, attention, and the ability to build on what was learned yesterday. When memory is weak and attention is drifting, each practice session starts almost from scratch. A person may learn a new task at work on Monday, and by Wednesday they have forgotten the steps. They may try to learn a new route, a new recipe, or a new way of doing something, and find that it simply will not stick. This is not a lack of trying. It is a brain that cannot hold onto new information long enough to turn it into a lasting skill, and it is deeply frustrating for the person who is trying.
The part of the brain most involved in forming new memories is called the hippocampus, and research suggests that long-term opioid use is linked with changes in this area. The evidence is still developing, and it would be wrong to claim that morphine causes a specific, fixed amount of damage to the hippocampus in every person. What can be said honestly is that the pattern of memory problems reported by people who use opioids regularly is consistent, and it matches what would be expected when the brain’s memory systems are slowed and disrupted over a long period. For older people, whose memory is already more fragile, the effect can be more serious, and it can be harder to tell where the drug’s effect ends and age-related change begins.
Reactions Slow Down
Reaction time is the gap between something happening and your response to it, and morphine widens that gap. A person who is under the influence of morphine takes longer to notice a change, longer to decide what to do, and longer to act. In everyday life, that shows up as clumsiness: knocking things over, dropping things, tripping on a step. It shows up as slower driving, slower walking, and a general sense that the body is a half-step behind the mind.
This slowing is dangerous in situations where a quick response matters. Crossing a busy road, using machinery, cooking over a hot stove, or looking after a small child all require the brain to notice a risk and react in time. When reactions are slowed, the margin for error shrinks. A person may step into the road a second too late, or fail to pull their hand away from a hot pan in time, or fail to catch a child who is about to fall. These are not hypothetical risks. They are the everyday accidents that happen more often when the brain is slowed by an opioid, and they are one of the most practical reasons why morphine and driving, or morphine and operating machinery, are a dangerous combination.
Sleep adds to the problem. Morphine disrupts normal sleep, making it lighter and more broken, even though it also makes a person drowsy. A person may sleep for long hours and still wake up tired, because the sleep was not restorative. Poor sleep on its own slows reactions and weakens memory, so the drug and the poor sleep reinforce each other. The person is drowsy because of the drug, tired because of the poor sleep, and slow because of both, and the cycle repeats day after day.
It is worth being clear that this slowing does not disappear the moment the drug wears off. With regular use, the brain’s baseline speed drops, and the person may feel slow even between doses. They may also experience the opposite problem during withdrawal, when the brain becomes overactive and restless, and thinking feels jittery rather than slow. The brain is being pushed in one direction by the drug and in the other direction by its absence, and neither state is the clear, steady thinking that a healthy brain provides.
Judgement and Risky Decisions Change
The part of the brain that helps us plan, weigh consequences, and resist impulses is the prefrontal cortex, at the front of the head. It is the part that asks, before we act, whether this is a good idea, what might go wrong, and whether the short-term gain is worth the long-term cost. Morphine weakens this part of the brain’s work. Decisions become quicker and less careful. Risks that would once have seemed obvious are overlooked. The future feels less real, and the present feels more urgent.
In daily life, this shows up as choices that the person themselves would once have recognised as unwise. Spending money that is needed for food or rent. Taking a risk on the road, or with a stranger, that they would normally avoid. Agreeing to something without thinking it through. Mixing morphine with alcohol or other drugs, even though the combination is far more dangerous than either alone. These are not decisions made by a foolish person. They are decisions made by a brain whose judgement system is being dulled by a drug, and whose reward system is shouting louder than its caution system.
This change in judgement is closely linked to addiction. The reward system, strengthened by morphine, pushes hard for the next dose. The judgement system, weakened by morphine, is less able to push back. The result is a loop: the drug makes the person want more of the drug, and it also makes them less able to resist that want. Breaking the loop is not a matter of willpower alone, because the very brain system that willpower depends on is the one being weakened. That is why addiction is so hard to escape, and why support, rather than blame, is the right response.
Families often notice the change in judgement before the person does. They see someone who was once careful with money becoming careless, someone who was once cautious becoming reckless, someone who was once reliable becoming unpredictable. They may put it down to stress, or to a change in character, when in fact it is a drug effect on the brain. Naming it as a drug effect does not excuse the harm that bad decisions can cause, but it does explain it, and an explanation is the first step towards getting help.
Mood, Anxiety and Low Spirits
Morphine changes mood as well as thinking, and the change is not a simple one. In the short term, it can bring a feeling of warmth, calm, and relief, which is part of why people keep using it. But that calm is borrowed, and it is paid for later. As the drug wears off, mood drops, often below where it started. A person may feel flat, anxious, irritable, or low, and the only thing that lifts the mood quickly is another dose. Over weeks and months, this cycle teaches the brain that morphine is the only reliable way to feel normal, and normal life starts to feel grey by comparison.
Anxiety is a common part of this pattern. Between doses, a person may feel restless and on edge, worrying about when the next dose will come, whether they will have enough, and what will happen if they run out. That worry is not just about the drug. It is the brain’s reward system sounding an alarm because its expected reward has not arrived. The anxiety can be intense, and it can make it very hard to concentrate on anything else. Work, conversation, and rest all become secondary to the question of the next dose.
Low mood and depression are also common with long-term opioid use. The brain, having become used to the powerful dopamine rush from morphine, produces less of its own reward chemicals, and everyday pleasures stop registering. Food tastes less interesting. Music sounds flat. Time with loved ones feels like an effort rather than a joy. A person may withdraw from the people and activities that once mattered to them, not because they no longer care, but because their brain no longer rewards them for caring. That withdrawal makes the low mood worse, because isolation and inactivity are themselves depressing, and the cycle deepens.
It is important to be honest that the relationship between morphine and mood runs in both directions. People who are already anxious or depressed are more likely to use opioids, and people who use opioids are more likely to become anxious or depressed. That does not mean the drug is a treatment for low mood, even though it can feel like one in the moment. It means the drug offers a short, false relief and then makes the underlying problem worse, which is the opposite of a treatment.
Tolerance, Dependence and the Changing Brain
With regular use, the brain adapts to morphine, and that adaptation has a name: tolerance. The same amount that once brought relief or a strong effect brings less and less, so the person needs more to get the same result. This is not a sign that the person is being greedy or reckless. It is the brain’s normal response to a drug that keeps flooding its receptors. The receptors become less sensitive, the brain produces fewer of its own pain-relieving chemicals, and the whole system shifts to expect morphine as a regular input.
Dependence follows tolerance. The brain, having adjusted to morphine, now needs it just to feel normal. Without it, the person feels ill: restless, anxious, sweaty, unable to sleep, with aching muscles and a mind that will not settle. These withdrawal symptoms are the brain’s alarm system, demanding the drug it has come to depend on. They are deeply unpleasant, and they are one of the main reasons people find it so hard to stop, even when they can see clearly that the drug is harming them.
The brain changes behind tolerance and dependence are not only about receptors. Over months, the brain’s wiring itself changes. The connections that link a place, a person, or a time of day with morphine become stronger, so that simply being in a familiar setting can trigger a craving. The connections that support clear thinking, patience, and planning become weaker, because they are used less. The brain is not a fixed machine. It is a living organ that reshapes itself around what it does most often, and when what it does most often is use morphine, it reshapes itself around morphine.
This is why stopping is not simply a matter of deciding to stop and then feeling fine. The brain needs time to readjust, to restore its sensitivity, to rebuild its own chemical balance, and to weaken the connections that trigger cravings. That readjustment is uncomfortable, and it takes weeks or months, not days. It is also why support matters so much. A person whose brain is readjusting needs rest, food, medical care, and people around them who understand what is happening. Willpower alone is a poor tool for a job that is, at its heart, a brain rebuilding itself.
The Brain Over Months and Years
In the short term, morphine’s effects on the brain are mostly reversible: the fog lifts, the drowsiness fades, and thinking sharpens again. With regular use over months and years, the picture becomes less certain. The brain’s ability to recover is real, but it is not unlimited, and the longer the use goes on, the longer the recovery is likely to take.
One concern is the effect on the brain’s blood supply. Opioids can affect breathing, and when breathing is slowed night after night, the brain receives less oxygen than it should. Over years, that repeated shortage may contribute to a decline in thinking and memory, especially in older people. The evidence for this is still developing, and it would be wrong to present it as a settled fact. What can be said is that a brain that is regularly starved of oxygen, even mildly, is a brain under strain, and strain over years is never harmless.
Another concern is the cumulative effect on mood and thinking. A person who has spent years with a foggy mind, a weak memory, and poor judgement has also spent years making fewer plans, learning fewer new things, and engaging less with the world. Those years are not just lost time. They are years in which the brain has had less exercise, less challenge, and less stimulation, and that lack of stimulation itself weakens thinking. The drug does the damage directly, and then the life that the drug creates does further damage indirectly, by shrinking the person’s world.
None of this means recovery is impossible. Research on people who stop using opioids shows that thinking, memory, and mood do improve over time, often substantially, especially in the first year after stopping. The improvement is gradual, and it is not the same for everyone. Younger people tend to recover more fully. People who have used for a shorter time tend to recover faster. People who get proper support, including medical care and help with sleep, food, and daily routine, tend to recover better than those who try to do it alone. The brain can heal, but it heals best when it is given time, support, and a life worth engaging with again.
My Take:
I will be honest with you. I do not think morphine is a simple villain, and I do not think everyone who takes it is making the same choice. In a hospital, for severe pain, morphine can be a mercy, and the doctors who prescribe it are trying to relieve suffering that nothing else can touch. That is a very different situation from using morphine outside medical care, where there is no doctor watching, no safe plan, and no one to notice when the dose creeps up and the brain starts to slow. I think it matters to hold both of those truths at once, because pretending morphine is only ever evil, or only ever helpful, would be dishonest.
What troubles me most is the fog. I have written about it at length in this article, and I keep coming back to it, because I think it is the harm that changes a life most quietly. Pain is loud. You notice it, you complain about it, you seek help for it. A foggy mind is quiet. You lose a word here, you forget an appointment there, you read a page twice and still do not take it in, and you put it down to tiredness or age. By the time you realise that your thinking has genuinely changed, years may have passed, and the change may feel like it is simply who you are now. That is what frightens me about morphine’s effect on the brain. It does not announce itself. It creeps in, and it stays.
I think about memory in the same way. A memory is not just a fact stored in the head. It is a birthday, a conversation with a child, a day that mattered. When morphine weakens memory, it does not just make a person forget a shopping list. It makes them forget the small moments that make a life feel like their own. I find that genuinely sad, because those moments cannot be recovered later. You cannot go back and re-live a child’s story that you were too foggy to follow the first time. The loss is real, and it is permanent in a way that a forgotten appointment is not.
Judgement is the part I find hardest to talk about without sounding judgemental, so I want to be careful. When I say morphine weakens judgement, I am not saying that people who use it are foolish. I am saying that the part of their brain that weighs risks and consequences is being dulled by a chemical, and that dulling has real effects on real decisions. Money, safety, relationships — all of them suffer when judgement suffers. I think it is important to name that plainly, because otherwise families blame the person for choices that the drug helped to cause, and the person blames themselves, when the truth is more complicated and more forgiving than either of those accounts.
The mood cycle is something I think about a lot, because it is so cruel. Morphine offers calm, and then it takes calm away, and then it offers itself as the only way to get calm back. That is not a fair bargain. It is a trap, and it is a trap that is built into the way the drug works on the brain’s reward system. A person who is caught in that cycle is not weak. They are dealing with a brain that has been rewired to believe that morphine is the only source of relief, and rewiring a brain takes time, support, and patience. I think anyone who tries to break that cycle deserves respect, not lectures.
I also think it is worth saying that stopping is hard in a way that people who have never been dependent cannot fully understand. The withdrawal is not just uncomfortable. It is a brain in alarm, demanding the drug it has come to depend on, and that alarm is loud and constant. Add to that the fog, the poor sleep, and the low mood, and you have a person who is trying to make the hardest decision of their life with a brain that is at its weakest. That is why I believe support is not optional. It is essential. A doctor, a support service, a family member who understands — these are not luxuries. They are the difference between a person who manages to stop and a person who tries alone and fails, and then blames themselves for the failure.
If someone I loved was using morphine outside medical care, the brain effects are what I would worry about most, because they are the effects that make every other problem harder to solve. A foggy mind cannot plan a way out. A weak memory cannot hold onto the reasons to stop. Poor judgement cannot weigh the risks clearly. Low mood cannot find the energy to seek help. I would not be worrying about one symptom. I would be worrying about a brain that has lost the very tools it needs to escape, and that is a frightening thought. It is also a thought that makes me want to say, as clearly as I can: please do not try to do this alone. Please talk to a doctor, or to a support service, and let them help you while your brain is still recovering.
I think about the future, too, and I want to be honest about it. The brain can recover after morphine use, and the evidence for that recovery is genuinely encouraging. Thinking sharpens, memory improves, mood lifts, and people often say they feel like themselves again for the first time in years. But that recovery takes time, and it takes support, and it is not guaranteed to be complete for everyone. The longer the use went on, the longer the recovery is likely to take. That is not a reason to give up. It is a reason to start sooner, while the brain still has more to recover with, and to be patient with yourself while the recovery happens.
Finally, I want to speak directly to anyone who has never used morphine and is considering it. The drug may promise relief, or pleasure, or escape, and for a short time it may seem to deliver. But the price it charges is paid in your thinking, your memory, your judgement, and your mood, and that price is charged every day, for as long as you keep using. You will think more slowly, remember less clearly, decide less wisely, and feel less joy in the ordinary things that make life worth living. That is not a scare story. It is what the evidence shows, and it is what happens to real people. The safest choice is not to start, and if you have started, the second safest choice is to stop with proper medical help, as soon as you can. Your brain is the most valuable thing you own. Protect it.
I think about work, because the brain effects of morphine show up there first for many people. A person who cannot concentrate, who forgets instructions, and who reacts slowly is a person who will struggle at work, no matter how skilled they once were. They may miss deadlines, make mistakes, and lose the confidence of their colleagues. Eventually they may lose the job itself, and with it the income, the routine, and the sense of purpose that work provides. I do not think that is a story about laziness. I think it is a story about a brain that can no longer do what the job asks of it, and a drug that keeps making that brain slower.
I also think about the people around the person who uses morphine, because they live with the brain effects too, even though they never took the drug. A partner who has to repeat everything three times. A child who cannot get a straight answer to a simple question. A colleague who has to check every piece of work twice. These people are not being harmed by the drug directly, but their lives are made harder by it, day after day. I think their frustration is understandable, and I also think it helps to remember that the fog, the forgetfulness, and the poor judgement are drug effects, not a lack of love or care. The person underneath is still there, even when the drug makes them hard to reach.
There is a question I keep asking myself, and it is this: how much of a person’s life is lost to slow thinking? Not to the high, and not to the withdrawal, but to the ordinary business of moving through the world half a step behind everyone else. The conversations missed because attention drifted. The opportunities missed because a decision was made too quickly. The skills never learned because memory would not hold them. Add those losses up over five years, and the total is enormous. It is a whole life, lived in smaller pieces than it needed to be, and that is the real cost of what morphine does to the brain.
I want to be fair to the researchers who study this subject, because their work is careful. They do not claim that morphine causes the same damage in every person, and neither should I. They say that opioids slow thinking, weaken memory, change judgement, and affect mood, and that the effects grow with regular use and with time. That careful wording matters to me. It means the warning is not exaggerated, and it means it can be trusted. When careful researchers say a drug changes the brain, I listen, and I think you should too.
I am also thinking about the people who have already stopped, and who are waiting for their thinking to come back. I want to be honest with you as well. Your brain may take months to feel clear again, and you may still forget things more easily than other people for a while. That does not mean stopping failed. It means your brain is rebuilding after a long period of strain, and rebuilding takes time. Sleep as regularly as you can, eat as well as you can, and give yourself small tasks that stretch your thinking a little each day, without overwhelming yourself. Read a page, learn a small skill, have a real conversation. Each one is a small exercise for a brain that is getting stronger again.
One more thing I believe strongly is that early help is better than late help. A person who talks to a doctor when the fog is still mild has a better chance than a person who waits until they have lost a job, damaged a relationship, or had an accident. If you notice that your thinking has changed, that you are forgetting things, or that you are making decisions you would once have avoided, do not wait for it to sort itself out. It may not sort itself out on its own, and the longer you wait, the harder the recovery becomes. Asking for help early is not weakness. It is good sense.
If you are a parent, I would ask you to think about what your children see. A child does not understand receptors or dopamine. What a child understands is that their parent is often drowsy, often forgetful, and often not really present, even when they are in the same room. That is the memory they carry. I do not say this to add guilt, because guilt does not help anyone recover. I say it because many people who use opioids tell health workers that their children were the reason they finally sought help. The thought of a child growing up with a parent who is only half there was stronger than the pull of the drug. If that thought is in your mind, hold on to it.
In the end, my view is simple. Morphine may have a place in medical care, where a doctor can watch its effects and weigh them against severe pain. Outside that care, its effect on the brain is a heavy price to pay for a short feeling of relief. It slows your thinking, weakens your memory, clouds your judgement, and flattens your mood, and it does so day after day, for as long as you keep using. I do not think that is a fair trade, and I do not think anyone would choose it if they could see the full price in advance. The best choice is not to start. The second best choice is to stop with proper medical help, and to give your brain the time, rest, and support it needs to become clear again.
Frequently Asked Questions
Is foggy thinking from Morphine dangerous?
Foggy thinking itself is not usually an emergency, but it can be dangerous because it makes accidents more likely. A person who cannot concentrate, who reacts slowly, and who forgets important details is more at risk when driving, cooking, using machinery, or looking after a child. Foggy thinking can also hide more serious problems, because a person who is always foggy may not notice a new and worrying symptom. Anyone who notices persistent foggy thinking should speak to a qualified health professional.
How soon can poor judgement in risky moments appear after using Morphine?
Poor judgement can appear quite quickly, even after a short period of regular use, because morphine affects the part of the brain that weighs risks and consequences from the start. For some people the change is noticeable within days, while for others it builds up over weeks. The risk grows with regular use, with higher amounts, and with mixing morphine with alcohol or other drugs. It varies from person to person, and other health factors can add to it.
Who is most at risk of difficulty learning new skills from Morphine?
People who use morphine regularly over a long period face the highest risk, as do older people, whose memory and learning are already more fragile, and teenagers, whose brains are still developing. People who already have memory problems, who sleep badly, or who mix morphine with other drugs also face extra risk. Anyone who needs to learn new skills for work or study is likely to notice the effect sooner, because the demands on their memory are higher.
Can Morphine really cause a brain that feels dulled?
Yes. Morphine slows the brain’s processing speed, weakens concentration, and disrupts the systems that form and store memories, which together create the feeling of a dulled or foggy mind. This is a recognised effect of opioids, and it is reported consistently by people who use them regularly. The feeling is not imaginary, and it is not a sign of low intelligence. It is a direct effect of the drug on the brain.
Does trouble planning ahead from Morphine go away after stopping?
In many cases planning and clear thinking do improve after a person stops using morphine, but the recovery is gradual and it is not the same for everyone. Some people notice improvement within weeks, while others take months, especially if they used for a long time. The brain needs time to restore its chemical balance and to rebuild the connections that support planning and attention. Proper medical support, regular sleep, and a structured daily routine can help the recovery.
What should I do if Morphine is causing confusion after heavy use?
The safest step is to speak to a doctor or a local health service promptly, especially if the confusion is severe, sudden, or getting worse. Do not try to stop suddenly on your own without medical advice, because stopping an opioid abruptly can be very unpleasant and, in some situations, unsafe. A health professional can assess the situation, treat any urgent problems, and help plan a safe way forward, including support for stopping. If someone is very confused, hard to wake, or breathing slowly, seek urgent medical help.
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.
