What Does Fentanyl Do to Your Memory

Fentanyl is an extremely strong synthetic opioid, far stronger than morphine, and its most feared harm is the way it can slow breathing to a stop. That danger is real and immediate. But there is a quieter harm that people talk about far less, and it is the subject of this article: what fentanyl does to memory. A person who uses fentanyl repeatedly may start to forget appointments, lose the thread of a conversation, struggle to learn something new, or find that yesterday feels strangely distant. These changes often arrive slowly, one small slip at a time, which is why they are easy to dismiss at first. A missed birthday, a forgotten errand, a name that will not come to mind — each one on its own looks like ordinary tiredness. Together, over weeks and months, they can add up to a serious change in how a person thinks, learns and lives.

Memory is not a single thing. It is a set of skills the brain uses every day: holding a phone number in mind for a few seconds, remembering what happened this morning, learning a new route to work, recognising a face, recalling a word at the right moment, and following a set of instructions from start to finish. Fentanyl can interfere with several of these skills at once, because it changes how the brain handles signals, sleep and oxygen. This article explains, in plain words, how that happens, which kinds of memory tend to suffer first, why learning becomes harder, how sleep and mood make the problem worse, and when memory trouble is a warning sign that needs urgent help. It is general information only, not personal medical advice. If you are worried about yourself or someone close to you, a qualified health professional is the right person to talk to.

What Fentanyl Does in the Brain

To understand why fentanyl affects memory, it helps to know a little about what it does in the brain. Fentanyl acts on the brain’s opioid system, a network of docking points that normally responds to the body’s own natural chemicals. When fentanyl reaches those docking points, it sends a very strong signal, far stronger than the signals the brain is built to handle in everyday life. That signal dulls pain and creates a powerful feeling of calm or pleasure, and it also slows down several of the brain’s normal jobs at the same time. Breathing slows. Alertness drops. Attention narrows. The brain’s ability to take in new information and file it away for later becomes weaker while the drug is active.

The part of the brain most closely tied to forming new memories is called the hippocampus, a curved structure deep inside the brain that works a bit like a librarian, sorting new experiences and deciding which ones to keep. When fentanyl is active, this sorting process is disrupted. New information may be noticed for a moment and then lost, because it was never properly stored. That is why a person can have a conversation, agree to do something, and then have no clear memory of it an hour later. The conversation really happened, but the brain did not keep a lasting record of it. The same disruption affects attention. If you are not fully paying attention in the first place, because you feel drowsy or foggy, the brain has very little to store, and later recall becomes almost impossible.

Fentanyl also affects the prefrontal cortex, the area at the front of the brain that helps with planning, organising and holding several things in mind at once. This is the part you use when you follow a recipe, count change, plan your day, or keep track of what someone is saying while you think of a reply. When this area is slowed down, ordinary tasks take more effort and more mistakes creep in. You might start a task, get distracted, and forget what you were doing. You might read the same paragraph three times and still not remember what it said. These are not signs of laziness or lack of intelligence. They are signs that the brain’s working systems are being pressed down by a powerful drug.

Another factor is oxygen. Fentanyl slows breathing, and when breathing slows, less oxygen reaches the brain. The brain needs a steady supply of oxygen to work properly, and even short periods of low oxygen can leave a person confused and foggy. Repeated episodes can add to the damage over time. This is one reason why memory problems linked to fentanyl are not only about the drug’s direct effect on memory circuits. They are also about the wider strain it places on the whole brain, through drowsiness, slowed breathing and broken sleep, all working together.

Why Short-Term Memory Goes First

Short-term memory is the brain’s scratch pad. It holds information for seconds or minutes: the name of a person you have just met, the item you went into the next room to fetch, the first half of a sentence while you listen to the second half. It is a fragile system even in a healthy brain, and it is usually the first to suffer when fentanyl is involved. People often notice this before anything else. They walk into a room and forget why they went there. They ask the same question twice in one conversation. They lose track of a story halfway through telling it. They put something down and cannot remember where it is five minutes later.

There is a simple reason for this. Short-term memory depends on alertness and attention, and fentanyl reduces both. When a person is drowsy, their attention drifts, and information passes through without being held. Imagine trying to write a note on wet paper: the pen moves, but the words do not stay. That is roughly what happens to short-term memory under fentanyl. The information arrives, but it is not held firmly enough to be used a moment later, let alone passed on to long-term storage.

This can look harmless at first, even funny — the classic image of someone who keeps losing their keys. But when it happens every day, it starts to change how a person lives. They stop trusting their own memory, so they stop relying on it. They write everything down, set reminders for the simplest things, or ask other people to remember for them. At work, they may miss instructions, repeat mistakes, or need the same thing explained again and again. At home, they may forget a promise made in the morning, or a meal left cooking, or a child waiting to be picked up. Each incident is small, but the pattern is not small. It is a steady narrowing of the brain’s ability to hold the present moment.

It is also worth knowing that short-term memory trouble can be worse in the hours after use, when the drug is most active, and can ease a little as it wears off. That up-and-down pattern can fool people into thinking the problem is temporary. It may feel temporary in a single day, but when use is repeated day after day, the brain gets very little time to work at its best. The scratch pad is wiped again and again before anything on it can be kept, and over time the person may find that even on clearer days, their memory is not as sharp as it used to be.

Learning New Things Becomes Harder

Learning is memory in action. Every time you learn something new — a bus route, a skill at work, a few words in another language, working a new phone — your brain has to pay attention, practise, and then store what it has learned so it can be used again. Fentanyl makes each of those steps harder. Attention is weaker, so the first step is shaky. Practice is harder to sustain, because focus drifts and energy is low. And storage is weaker, because the brain’s filing system is disrupted while the drug is active.

For a student, this can mean reading a chapter and remembering almost nothing from it the next day. The words were seen, but they were not learned. For a worker, it can mean being shown a new task and needing to be shown again the next day, and the day after that, which is embarrassing and frustrating for everyone involved. For an older person, it can mean struggling with things that used to be easy, like following a new recipe or remembering the steps for paying a bill online. The person is not suddenly less capable as a human being. Their brain is being asked to learn while it is slowed down, and that is a hard way to learn anything.

What makes this especially painful is that the person often knows they are struggling. They can feel the gap between what they used to manage easily and what they manage now. That awareness can bring shame, and shame can make a person avoid learning altogether. They stop trying new things. They avoid training, avoid reading, avoid conversations where they might be asked a question they cannot answer. Over time, that avoidance makes the problem worse, because the brain, like a muscle, stays sharper when it is used. A person who stops learning because learning feels hard may find that their memory gets weaker still, not only because of the drug, but because they are no longer giving their brain the practice it needs.

Families sometimes misread this. They see someone who used to be quick and capable now struggling with simple tasks, and they assume the person is not trying, or does not care. That misunderstanding adds strain to relationships that are already under pressure. It helps to understand that the difficulty is real and physical, not a choice. The brain’s learning system is being interfered with, and no amount of effort alone can fully overcome that while use continues.

Names, Faces and Everyday Details Slip Away

Some of the most upsetting memory problems linked to fentanyl are the personal ones: forgetting a name, failing to recognise a face, or losing the details of a shared memory. Names are particularly vulnerable, because remembering a name requires linking a sound to a face in a single moment, and that link is exactly the kind of new connection that a slowed-down brain struggles to form. A person may meet someone, hear their name clearly, and still be unable to recall it five minutes later. In a conversation, that feels awkward. Repeated often, it feels humiliating, and the person may start avoiding social situations altogether.

Faces can be affected in a similar way. The brain stores faces through a network of areas that work together to match what you see now with what you have seen before. When that network is dulled, a familiar face can feel strangely unfamiliar, or a person can be recognised but their name, or where you know them from, stays out of reach. This does not mean the person has forgotten who their family are. It means the quick, automatic recall that most of us take for granted has become slower and less reliable. A mother may know perfectly well who her child is, yet still blank on the name of the child’s teacher, or the day of the school meeting, or the story her child told her that morning.

Everyday details are the glue of a shared life: who said what, when the bill is due, what was agreed, where something was put. When those details keep slipping, life becomes harder to organise and relationships become harder to maintain. A partner may feel ignored when a promise is forgotten. A friend may feel unimportant when a birthday is missed. A parent may feel they are failing when they forget a school event. None of this is because the person does not care. It is because the details were never stored properly in the first place, or because they were stored but cannot be found again when needed. Understanding that difference matters, because blame does not fix a memory problem, and it often makes the person hide the problem instead of asking for help.

Focus, Attention and Thinking Speed

Memory and attention are closely linked, and fentanyl weakens both. Attention is the brain’s ability to stay with one thing and shut out the rest. When attention is weak, memory suffers, because the brain never fully takes in what it is supposed to remember. A person using fentanyl may find that their mind wanders in the middle of a conversation, or that they start a task and drift away from it within minutes. They may sit down to watch a programme and realise they have followed none of it. They may be told something important and nod, only to realise a moment later that they heard the words but did not take in the meaning.

Thinking speed slows as well. Decisions that used to be quick now take longer. A simple choice — what to cook, which bus to catch, how to reply to a message — can feel strangely heavy. This is not because the person has become less intelligent. It is because the brain is working through fog. Signals travel more slowly, connections are harder to make, and the person has to put in more effort for the same result. That extra effort is tiring, and tiredness makes attention worse again, in a circle that is hard to break.

At work or in study, this shows up as slower output, more errors, and difficulty following multi-step instructions. A task with three steps becomes a task where step two is forgotten before step three begins. The person may cope by doing one thing at a time, very slowly, and avoiding anything complicated. That coping can work for a while, but it narrows life. Jobs that need quick thinking, learning or remembering become harder to keep. Driving becomes riskier, because a driver who cannot focus or react quickly is a danger to themselves and others. Even a conversation becomes tiring, because following what someone says, remembering what was said a minute ago, and thinking of a reply all at once is a heavy load for a slowed-down brain.

Sleep, Mood and Memory Together

Memory does not work in isolation. It depends heavily on sleep and mood, and fentanyl disturbs both. During sleep, especially deep sleep, the brain sorts through the day’s experiences and moves the important ones into long-term storage. It is a bit like a shopkeeper putting the day’s takings into the safe at night. If sleep is broken, shallow or too short, that sorting does not happen properly, and memories that were only weakly stored during the day are lost overnight. Fentanyl is known to disrupt sleep patterns, so a person may sleep for many hours yet wake up feeling unrefreshed, with a brain that has not done its night-time filing properly.

Mood plays a part too. Low mood, anxiety and stress all make memory worse. When a person feels low, they pay less attention to the world around them, and they find it harder to concentrate. When they feel anxious, their mind is busy with worries, and there is less room left for new information. Fentanyl use is often linked with low mood and anxiety, both as a cause and as a result: a person may use it to escape difficult feelings, and the drug itself, plus the problems it creates, can deepen those feelings over time. The result is a loop where low mood weakens memory, weak memory creates more problems and embarrassment, and those problems deepen the low mood further.

Appetite and general health matter as well. A person who eats poorly, drinks too little water, or is often unwell gives their brain less of what it needs to work well. Fentanyl can reduce appetite, and the lifestyle that often goes with heavy use can mean irregular meals, little fresh food, and poor self-care. None of these is a small detail. The brain is a physical organ, and it works best when the body is fed, rested and healthy. When those basics are missing, memory suffers further, on top of the drug’s direct effects.

Breaking this loop is not a matter of willpower alone. Sleep, mood and memory are tied together in the body, and improving one often helps the others. But while fentanyl use continues, the drug keeps pulling in the opposite direction, disrupting sleep, flattening mood and slowing the brain’s filing system all at once. That is why memory problems linked to fentanyl often feel so stubborn: they are not caused by one thing, but by several things pressing on the brain at the same time.

When Memory Problems Become Dangerous

Most of the memory problems described in this article build up slowly. But there are times when confusion or memory loss is a sign of immediate danger, and those times need urgent help, not patience. Fentanyl can slow breathing so much that the brain is starved of oxygen. When that happens, a person may become extremely drowsy, hard to wake, confused, or unable to respond normally. Their breathing may be slow, shallow or irregular, their lips may look blue, and their skin may feel cold or clammy. This is an emergency. In many countries, emergency services should be called at once, and if naloxone, a medicine that can reverse an opioid overdose, is available, it should be used as directed while waiting for help. Do not wait to see if the person improves on their own, and do not leave them alone.

Even outside a full emergency, there are warning signs worth taking seriously. If a person who uses fentanyl suddenly becomes much more confused than usual, cannot remember where they are, cannot recognise people they know well, or has a seizure, that needs urgent medical attention. If they have had a period where they stopped breathing or were found unresponsive, they need to be checked by a health professional even if they seem to recover, because the brain may have been without enough oxygen and the effects may not be obvious at once. Memory trouble after such an episode can be a sign that the brain has been harmed, and only a professional can assess that properly.

Mixing fentanyl with other substances makes all of this more dangerous. Alcohol, sleeping medicines and other drugs that slow the brain and breathing can multiply the risk of a serious overdose and of lasting brain harm. A person may not realise how dangerous the combination is, because each substance on its own felt manageable, but together they can overwhelm the brain’s ability to keep breathing. This is one of the reasons why memory problems and confusion in someone who uses fentanyl should never be dismissed as just tiredness or just forgetfulness. They can be the visible surface of a much deeper problem with oxygen and brain function, and they deserve to be taken seriously.

How Memory Changes Over Months and Years

In the early days, memory problems linked to fentanyl may come and go. A person may have a bad week, then a clearer one, and assume the problem has passed. Over months, the pattern often becomes steadier. The forgotten appointments become more frequent. The need for lists and reminders grows. The person starts to rely on other people to remember things for them. Work becomes harder to keep up with, and the person may change jobs, or stop working, because they cannot keep track of what is expected of them. At home, the small failures accumulate into a sense that life is slipping out of control, not because of one big event, but because of hundreds of small ones.

Over years, the change can be more serious. Long-term heavy use is linked with lasting problems in thinking and memory, and some of that change may not fully reverse even after use stops. That is a hard truth, and it is important to say it plainly. The brain can recover a great deal when it is given time, rest, good food and proper support, and many people do find their memory improves after they stop using. But recovery is often gradual, taking months rather than days, and it is not guaranteed to return the brain to exactly how it was before. The longer and heavier the use, the harder the recovery tends to be. That is not a reason to give up hope. It is a reason to seek help sooner rather than later, because every month without the drug is a month in which the brain has a better chance to heal.

It is also important to remember that memory is not the only thing at stake. A person whose memory is failing may make unsafe decisions, forget to eat, forget to take prescribed medicines for other conditions, or forget dangers such as a stove left on or a door left unlocked. They may be more vulnerable to accidents, to being taken advantage of, or to getting lost in an unfamiliar place. Memory loss, in other words, is not only a personal frustration. It is a safety issue, for the person and for those around them. That is why families and friends often notice the problem before the person does, and why their concern should be listened to, even when the person insists they are fine.

My Take:

I want to start with something I feel strongly about. Memory is one of the most personal things a person owns. It is how you know who you are, who you love, what you promised, and what you have lived through. When a drug starts to take that away, even slowly, it is not a small side effect. It is a theft of the very things that make a life feel like your own. That is why I think the memory harm of fentanyl deserves far more attention than it usually gets. Everyone talks about overdose, and they are right to, because overdose kills. But the slow loss of memory changes a life long before any overdose happens, and it changes the lives of the people around that person too.

What strikes me most is how quiet the damage is at the start. Nobody wakes up one morning and finds their whole memory gone. It goes in small pieces: a name here, an appointment there, a conversation that fades before the day is over. Because each piece is small, it is easy to explain away. Tiredness. Stress. Getting older. A busy week. I understand why people explain it away, because the alternative — that a drug is damaging your brain — is frightening to face. But I think facing it early matters more than almost anything else, because the earlier a person understands what is happening, the better their chance of stopping the damage before it becomes harder to undo.

I also think we misjudge people with memory problems far too often. When someone forgets a promise, we assume they did not care. When they ask the same question twice, we assume they were not listening. When they struggle to learn something new, we assume they are not trying. Those judgements are unfair, and they are also harmful, because they push the person away from the very people who could help them. A person who is already embarrassed about forgetting does not need to be told they are careless. They need someone to notice the pattern, to say it kindly, and to help them get support. I would rather be the person who notices and speaks up than the person who stays silent and watches a friend or family member fade.

The link between sleep and memory is something I keep coming back to, because it shows how tangled this problem is. Fentanyl does not only slow the brain while it is active. It also breaks the sleep that the brain needs to store memories properly. So the person is hit twice: first when they are awake and cannot take things in, and then again at night when their brain cannot file away what little it did take in. That double hit is why the memory loss can feel so stubborn, and why simply trying harder to remember does not fix it. You cannot force a tired, slowed-down brain to remember by effort alone, any more than you can force a broken filing cabinet to hold papers by pushing harder.

I think about families a lot when I read about this topic, because they are often the ones who carry the memory for the whole household. They remember the appointments, the birthdays, the bills, the school times, because the person using fentanyl no longer can. That is a heavy load, and it is often carried quietly, without thanks, and without the family understanding why it has fallen to them. Over time, that load breeds resentment, and resentment breeds arguments, and arguments make the person feel even more ashamed and isolated. I do not think blame helps anyone here. What helps is understanding that the forgetting is a symptom, not a choice, and that the family needs support too, not only the person using the drug.

There is a question I am often asked, in my own mind if nowhere else, and that is whether memory comes back after a person stops using fentanyl. The honest answer is that it often improves, but slowly, and not always completely. I find that both hopeful and sobering. Hopeful, because the brain is remarkably able to heal when it is given time, sleep, food and support, and many people do notice their thinking getting clearer over months. Sobering, because the healing is not instant, and because some of the damage may last. I think it is important to say both parts plainly, because false promises do not help anyone, and neither does hopelessness. The truth is in the middle: stopping gives the brain its best chance, and the sooner it happens, the better that chance is.

I also want to say something about the danger that hides behind forgetfulness. A person who cannot remember may forget to eat, forget a danger, forget where they are, or forget that they have already taken something. In the case of fentanyl, forgetting can be lethal, because a person who forgets how much they have used, or who takes more because they forgot the first amount, is at greater risk of an overdose. That is a frightening thought, and I do not raise it to scare anyone, but because it is true, and because it is another reason why memory trouble in someone using fentanyl should never be brushed aside. It is not only about losing the past. It is about safety in the present.

If you are reading this because you have noticed these changes in yourself, I want you to hear this without judgement. Noticing is a strength, not a failure. It takes courage to admit that your memory is not what it was, and it takes more courage to ask for help. You do not need to fix this alone, and you should not try to. A health professional can talk through what is happening, what support exists, and what steps might help, without shaming you. The support that exists today is better than it was a generation ago, and it is there because this problem is common, it is understood, and it is treatable in the sense that stopping use and getting support can genuinely improve a person’s life.

If you are reading this because you have noticed these changes in someone you love, I would say this: trust what you are seeing. You know this person. You know what their memory used to be like, and you know that what you are seeing now is different. That knowledge matters, even when the person insists they are fine. Bring it up gently, with examples, not accusations. Say what you have noticed, say that you are worried, and say that you want to help them get support. They may not listen the first time. They may get angry. That does not mean you were wrong to speak. Sometimes a person needs to hear the same concern from someone who loves them several times before they are ready to act on it.

I think the wider lesson here is about how we talk about drugs in general. We tend to focus on the dramatic dangers, the overdose, the hospital visit, the headline. Those matter enormously. But the slow, quiet harms — the memory that fades, the learning that stalls, the relationships that fray because promises keep being forgotten — those matter too, and they affect far more days of a person’s life than any single crisis. If we only warn people about the dramatic dangers, we miss the chance to warn them about the damage that happens on ordinary days, in ordinary homes, one forgotten detail at a time.

I also think about the practical side of living with a weakened memory, because advice that stays abstract does not help anyone get through a day. A person who keeps forgetting things needs simple, forgiving systems, not lectures about trying harder. Writing things down in one notebook, keeping keys and important items in the same place every day, setting a reminder for a medicine or an appointment, and asking a trusted person to double-check the important dates — these are not signs of failure. They are sensible ways to live with a brain that is struggling, and they reduce the number of small failures that wear a person down. I would rather see someone use a notebook and arrive on time than see them rely on a memory that keeps letting them down and then feel ashamed about it.

There is also the question of work, which I think deserves more honesty than it usually gets. A person whose memory and focus have been affected by fentanyl may find their job much harder than before, and they may be afraid to tell anyone at work what is happening. That fear is understandable, because workplaces are not always kind about drug use. But hiding the problem does not make it go away, and it often makes the mistakes worse. If it is possible, talking to a health professional first, and getting advice about what support exists, is a better step than struggling in silence and hoping no one notices. A person does not need to tell everyone. They need one trustworthy source of help, and a plan for the days when their memory is at its worst.

Children deserve a special mention here, because they are often the quietest witnesses to memory loss. A child who tells a parent something important and finds it forgotten the next day may feel unimportant, even when the parent loves them deeply. A child who is promised something and finds the promise broken may stop trusting promises altogether. I do not say this to add guilt to a difficult situation. I say it because children notice, and because a parent who understands that can take small steps to repair the damage: writing down what the child asked for, keeping the promises that are made, and being honest, in simple words, that they are having trouble remembering and are getting help for it. Honesty, even with a child, is kinder than silence.

I want to say something, too, about the shame that surrounds this topic. Many people who use fentanyl feel ashamed of the memory problems it causes, and that shame keeps them from asking for help. They worry they will be judged, or that a doctor will lecture them, or that their family will think less of them. I understand that fear, and I think it is one of the biggest barriers to recovery. But a health professional has heard this story before, many times, and their job is to help, not to judge. The shame belongs to the situation, not to the person. A person who asks for help is doing something brave, and I think that deserves to be said plainly and often.

One more thing I believe is worth saying, and that is the value of talking openly. Silence is what allows this kind of harm to grow unnoticed, in a single home, for months at a time. When a person talks about their memory honestly, with a doctor, with a family member, or with a support service, the problem becomes something that can be faced together instead of something carried alone in secret. That conversation may be uncomfortable, and it may not fix everything at once, but it is the point at which help becomes possible. I would rather have an uncomfortable conversation today than a quieter, sadder one a year from now, when far more has been lost.

Finally, I would say this to anyone who has never used fentanyl and is tempted to try it. Do not start. It is the simplest advice in this whole article, and it is also the most important. Fentanyl is not a drug that gives you a pleasant evening and leaves you unchanged. It is an extremely strong opioid that can slow your breathing to a stop, and it can also start to take your memory, your learning and your ability to think clearly, far sooner than you might expect. The first time may feel like nothing special. The habit that follows can take things from you that are very hard to get back. Your memory, your mind, your relationships and your future are worth more than that first feeling. Walk away from it, and keep them.

Frequently Asked Questions

How does Fentanyl affect memory?

What a person notices first depends on their health, their pattern of use and the amount involved, so the picture differs from person to person. The harm is rarely a single dramatic moment, because it usually grows from repeated strain that the body cannot fully repair between uses. Fentanyl can disturb memory by pushing the body’s normal balance out of place, and the effect often shows up in everyday life before it shows up anywhere else.

How soon can Fentanyl start harming memory?

Sleep, mood and appetite are often among the earliest things to change, because they respond quickly when the body’s balance is disturbed. Longer-term harm to memory tends to grow with the frequency and the length of use, which is why early patterns matter more than people think. Some harms linked with Fentanyl can appear after a short period of use, while others need weeks or months to build into something noticeable.

Can the harm Fentanyl does to memory be reversed?

Whether the harm to memory can be reversed depends on what has been damaged and for how long, and no general article can answer that for any one person. Other harm, especially to organs that heal slowly, may take much longer to improve, and some changes may not fully reverse. A qualified health professional can assess an individual situation, which is the only safe way to get a personal answer. Some effects, such as broken sleep or a dulled appetite, can improve when use stops and the body gets time, food and rest.

Who notices the harm of Fentanyl on memory first?

Colleagues, teachers and neighbours may also notice, in missed days, shorter patience and work that is no longer steady. Family members and close friends often notice the harm first, because they see the small daily changes in mood, sleep, appetite and reliability. The person using Fentanyl may be the last to see it, since the brain adapts to the pattern and the change feels normal from inside.

What makes the harm of Fentanyl to memory worse?

Mixing Fentanyl with other substances can multiply the danger, especially for breathing, the heart and consciousness. Poor sleep, skipped meals and existing health problems can also make the harm worse, because the body is already under strain. Using Fentanyl more often, in larger amounts or over a longer time generally increases the harm, because the body gets less chance to recover.

Where can I read reliable information about Fentanyl and memory?

Reliable general information about Fentanyl can be found from public health authorities such as NIDA, the NHS, the WHO, the CDC and the DEA, listed in the sources below. For questions about a specific person, the right step is a conversation with a qualified health professional, not an article. Those sources explain harms, risks and patterns of use in plain language, without selling anything or offering personal advice.

Sources

This article is general information only. It is not personal medical advice. For questions about a specific person, speak with a qualified health professional.