Sedation and pain control in ICU (Sedation and analgesia in intensive care)
How the intensive care team keeps a very unwell person comfortable, free of pain and able to tolerate treatment such as a breathing machine, using carefully adjusted medicines.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Sedation keeps a very unwell person calm and comfortable, often so they can tolerate a breathing machine; pain relief eases pain alongside it.
- Teams aim for the lightest safe sedation and often pause it daily (a sedation hold) to check how the person is and to help them recover faster.
- Too much sedation can lengthen time on the ventilator and increase confusion (delirium), so it is carefully balanced.
- Ask the team how deeply your relative is sedated, whether daily sedation breaks are used, and how they are checking for delirium.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Keeps a very unwell person comfortable and free of pain
Deep or prolonged sedation is avoided where lighter sedation is safe, because it can lengthen ventilation and worsen delirium.
Sedation is adjusted to keep the person comfortable, with daily breaks where safe. The team checks alertness, pain and delirium regularly.
Light, carefully scored sedation with daily breaks where safe.
Sedation is adjusted to keep the person comfortable, with daily breaks where safe. The team checks alertness, pain...
The person becomes more awake, may follow commands and can often start breathing more for themselves, working...
Drowsiness, muddled thinking, odd dreams and a poor sense of time are common and usually improve day by day...
Thinking becomes clearer, though tiredness and patchy memory of the stay are normal. Some people feel anxious or...
What is sedation and pain control in ICU?
Sedation and pain control are how the intensive care team keep someone comfortable and safe while they are very unwell. Sedatives are medicines that make a person calm, sleepy or unaware; pain-relieving medicines (analgesia) ease pain. They are usually given through a drip and adjusted minute by minute.
The most common reason for sedation is to help someone tolerate a breathing machine (ventilator), which can be very uncomfortable while awake. Sedation also helps with painful procedures, severe agitation, or conditions where rest is part of the treatment. The depth of sedation is matched to need: many patients are kept lightly sedated and rousable rather than deeply asleep.
Modern intensive care aims to use the lightest sedation that is safe. Too much sedation can prolong time on the breathing machine, cause confusion (delirium) and slow recovery. So the team regularly checks how awake someone is and, where appropriate, pauses sedation each day (a 'sedation hold' or 'sedation break') to see how they are doing.
Sedation is not the same as a general anaesthetic for an operation, and being sedated is not the same as being in a natural sleep. Patients may still hear voices, and families are encouraged to talk to them. As someone recovers, sedation is gently reduced and stopped.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Options at a glance
These are the main approaches described in this guide. The right option depends on the diagnosis, your goals and what your clinician thinks is safe.
Light (rousable) sedation
Medicines adjusted so the person is calm but can be woken and may follow simple commands. This is the goal for many patients, as it helps recovery and earlier breathing off...
Deeper sedation
Used when someone needs to be very still or unaware — for example with severe breathing problems or certain treatments. It is used for as short a time as is safe.
Pain relief (analgesia)
Medicines to control pain, given alongside or sometimes instead of sedation. Good pain control often reduces how much sedation is needed.
Daily sedation holds (sedation breaks)
Briefly pausing sedation, where appropriate, to check how awake the person is, how their breathing is, and whether they can move towards coming off the ventilator.
Preparing for your treatment
- There is usually nothing to prepare in advance — sedation is started by the team according to how unwell the person is.
- Tell the team about regular medicines, especially strong painkillers, sleeping tablets or alcohol use, as these affect sedation.
- Mention any past problems with anaesthetics, sedation or pain relief, and any chronic pain conditions.
- Share how the person normally communicates, and bring their glasses, hearing aids and dentures, which help reduce confusion.
- Ask the team how they will keep your relative comfortable and how they check for pain in someone who cannot speak.
- Families can help by talking calmly, bringing familiar voices or music, and keeping a sense of day and night.
What happens
Sedative and pain-relieving medicines are usually given through a drip and adjusted continuously by the bedside nurse, guided by sedation and pain scores. The team aims for a target level of alertness — often calm but rousable — rather than simply 'asleep'. Even when a person cannot speak, staff watch their face, movements, breathing and heart rate for signs of pain or distress and treat them.
Where it is safe, sedation is paused or lightened each day to check how awake the person is and whether they can breathe more for themselves. This helps the team reduce sedation as soon as possible and judge when the breathing tube can come out.
The team also actively looks for delirium — sudden confusion, agitation or hallucinations — using simple checks, and tries to prevent it with light sedation, day-night routines and familiar surroundings.
Families are encouraged to talk to their relative, as hearing a familiar voice can be comforting even during sedation. As the person improves, sedation is reduced and stopped, and they gradually become more awake and aware.
Is this treatment right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- Deep or prolonged sedation is avoided where lighter sedation is safe, because it can lengthen ventilation and worsen delirium.
- Sedation is not a way to manage being short of nursing staff or to keep someone quiet for convenience.
- Some sedatives are avoided or used with caution in people with certain heart, blood pressure or metabolic conditions.
- Sedation does not treat the underlying illness — it supports comfort while other treatment works.
Delay or rearrange if…
- Daily sedation breaks may be postponed if the person is too unstable to tolerate them safely.
- Reducing sedation may be paused during very severe breathing problems or certain treatments.
- Strong sedatives and painkillers are reduced gradually, not stopped suddenly, to avoid withdrawal.
- Changes are made cautiously in people with a history of substance use or chronic strong-painkiller use.
Alternatives to discuss
- The lightest possible sedation, or pain relief alone, where the person can tolerate it.
- Non-drug comfort measures: reassurance, familiar voices, day-night routines, glasses and hearing aids.
- Treating reversible causes of agitation (pain, full bladder, low oxygen) before increasing sedation.
- Specific delirium management rather than simply deepening sedation.
- Regional or local pain-relief techniques in selected cases to reduce sedative needs.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Comfort, sedation or contrast choices
If local anaesthetic, sedation, contrast or pain relief is used, ask what is planned, why, and what it means afterwards.
Benefits
- Keeps a very unwell person comfortable and free of pain
- Helps the person tolerate a breathing machine and other intensive treatments
- Reduces fear and distress during critical illness and procedures
- Light, carefully managed sedation supports earlier recovery and breathing off the machine
- Allows the team to keep someone safe and still when treatment requires it
Risks & complications
- Grogginess, drowsiness and a muddled sense of time while sedated and just afterwards
- Patchy or absent memory of the time in intensive care
- Vivid or frightening dreams, nightmares or hallucinations
- A dry mouth and the discomfort of a breathing tube
- Low blood pressure as a side effect of some sedatives, which the team manages
- Delirium — sudden confusion, agitation or paranoia — which is common in intensive care and usually settles
- Slow waking or prolonged drowsiness, especially after longer or deeper sedation
- Withdrawal symptoms when strong sedatives or painkillers are reduced
- Constipation or slowed gut from pain-relieving medicines
- Needing the breathing machine for longer if sedation has been deep
- A serious reaction to a sedative or pain medicine
- A rare metabolic reaction to high-dose, prolonged sedation with certain medicines
- Distressing memories or post-traumatic stress symptoms after recovery
- Lasting effects on memory, concentration or mood as part of post-intensive care syndrome
The main balance is between enough sedation for comfort and safety, and not so much that it prolongs ventilation and causes confusion. Delirium and frightening memories are common and can be distressing afterwards — but teams now actively prevent and treat them. Ask how deeply your relative is sedated, whether daily sedation breaks are used, and how the team is watching for and managing delirium.
Published figures to discuss
Whether someone develops delirium, frightening memories or longer-lasting effects depends on how unwell they are, how long and how deeply they are sedated, their age, and previous health. Delirium is common in intensive care but rates vary widely between patients and studies, so a single percentage would be misleading for any one person. We describe these risks in plain words instead; your team can give a fuller picture for your relative.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| ICU delirium with deep or prolonged sedation | Common, especially in ventilated patients | Modern ICU practice usually aims for the lightest safe sedation with regular pain and sedation scoring. | Guide sourcesClinical context |
| Over-sedation prolonging ventilation | Recognised and preventable in some patients | Daily sedation review and spontaneous breathing assessment help reduce unnecessary ventilator time. | Guide sourcesClinical context |
| Pain being under-treated because the patient cannot communicate | Common risk in ventilated or delirious patients | Behavioural pain scores and family input can help detect pain. | NHS — Sudden confusion (delirium)nhs.ukSource-linked context |
| Withdrawal after prolonged opioids, benzodiazepines or sedatives | Uncommon to common depending on duration and dose | Agitation, sweating, tachycardia or insomnia during weaning should prompt review rather than automatic escalation. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
As someone gets better, sedation is reduced and stopped, and they wake up gradually rather than all at once. It is normal to be drowsy, muddled and to have gaps in memory for a while. Clear-headedness usually returns over days, sometimes longer.
- Feeling groggy, muddled or dreamlike for the first days after sedation stops
- Gaps in memory, or only fragments, from the time in intensive care
- Vivid dreams or unsettling memories that fade over time
- Disturbed sleep and a mixed-up sense of day and night
- Feeling tearful, anxious or low while processing the experience
Aftercare
- Be patient with yourself — feeling foggy and tired after sedation and critical illness is normal and improves.
- Tell staff or your GP about frightening memories, flashbacks, nightmares or low mood; help is available.
- Keep to a day-night routine, use your glasses and hearing aids, and let daylight in to help your mind settle.
- Ask the team to help fill gaps in your memory of what happened, and consider a patient diary if one was kept.
- Take any prescribed medicines as directed and ask before stopping painkillers suddenly.
- Accept help from family and rest as you need to in the early weeks.
- Go to any critical care follow-up clinic offered, where memory, mood and sleep can be reviewed.
- Glasses, hearing aids and dentures brought in and labelled
- List of usual medicines, including any strong painkillers or sleeping tablets
- Note of any past reactions to sedation or anaesthetics
- Familiar music or voices for the bedside if helpful
- Questions about sedation and delirium written down for the team
- Patient diary or notes to help piece memories together later
- Follow-up clinic and GP details saved
⚠ Get urgent help if…
- Severe agitation or distress, or a person trying to pull at tubes (tell staff so comfort can be improved)
- After discharge: distressing flashbacks, nightmares or feeling constantly on edge
- Persistent low mood, hopelessness, or thoughts of self-harm — seek help promptly
- Confusion that is getting worse rather than better after going home
- Withdrawal symptoms (sweating, shaking, agitation) if strong medicines were stopped
- Severe pain that is not controlled — this should always be reported
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
Good sedation and pain control mean the person is comfortable and safe through the hardest part of their illness, with the lightest sedation that is safe, and is helped to wake, breathe and recover as soon as possible. A calm, pain-free patient who can be roused is usually a better sign than a deeply unconscious one.
Sedation cannot guarantee there will be no distressing dreams, no delirium, or no gaps in memory — these are common in critical illness. What good practice does is reduce them, recognise them, and support the person through them during recovery.
Most people's thinking and memory clear over days to weeks once sedation stops, though tiredness and patchy memories of intensive care can persist. A minority have longer-lasting effects on memory, concentration, mood or sleep — part of post-intensive care syndrome — which usually improve over months with support, follow-up and sometimes psychological help.
Related tests, treatments or support
Sedation and pain control are closely linked to breathing support, daily sedation breaks and the plan to come off the ventilator. They also affect delirium, nutrition and rehabilitation, so the team manages them together. After discharge, a critical care follow-up clinic and support such as ICUsteps can help with frightening memories and mood.
Follow-up & long-term care
While in intensive care, alertness, pain and delirium are reviewed continually. Before leaving hospital, the team explains what happened and any medicines. Some units offer a follow-up clinic weeks or months later to review memory, mood, sleep and any distressing memories, and to fill gaps using a patient diary. Your GP is kept informed.
- Keep to a regular sleep routine and let daytime light in to help your mind recover
- Tell your GP about lasting nightmares, flashbacks, anxiety or low mood
- Attend any critical care follow-up clinic offered
- Do not stop strong painkillers or sedatives suddenly — ask about a gradual plan
- Reach out to support such as ICUsteps if memories of intensive care are troubling you
Repeat, follow-on and what comes next
- Sedation is adjusted up and down many times as the person's condition changes.
- Daily sedation breaks may show someone is ready for less sedation, or not yet — both are useful information.
- Strong medicines may need a gradual reducing plan to avoid withdrawal.
- Delirium may need its treatment changed more than once before it settles.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- Light, carefully scored sedation with daily breaks where safe.
- Active screening for, prevention of, and treatment of delirium.
- Pain assessed and treated even when the person cannot speak.
- Families supported to be present and to help orient their relative.
- A follow-up clinic and support such as ICUsteps for distressing memories, anxiety or low mood after discharge.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- How long sedation and pain relief are needed
- The depth of sedation and the medicines used
- Monitoring required (sedation and pain scoring, delirium checks)
- Time on a breathing machine, which often goes alongside sedation
- Any specialist input for difficult pain or delirium
- Follow-up for distressing memories or low mood after discharge
- Whether sedation and pain control are included within the critical care daily charge
- Whether delirium screening and prevention are part of routine care
- What monitoring is included
- Whether a critical care follow-up clinic is offered and at what cost
- What psychological support is available if distressing memories occur
- What happens, and who pays, if sedation or ventilation is needed for longer
On the NHS? Sedation and pain control are a routine, carefully managed part of NHS intensive care; in private critical care they are likewise managed by the intensive care team rather than chosen separately by the patient.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Not explaining to families that sedation is adjustable and aims for the lightest safe level, not permanent sleep.
- Families not warned that delirium, odd dreams and memory gaps are common.
- No plan to recognise and treat pain in someone who cannot speak.
- Stopping strong sedatives or painkillers abruptly without warning about withdrawal.
- No follow-up offered for distressing memories or low mood afterwards.
Marketing red flags
- Describing being 'put to sleep' in intensive care as simple or without risks.
- Not mentioning delirium or the possibility of frightening memories.
- Implying deeper sedation is better or kinder, when light sedation usually aids recovery.
- No mention of psychological support after critical illness.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- How deeply is my relative sedated, and why that level?
- Do you use daily sedation breaks, and is that suitable here?
- How do you check for and manage pain when someone can't speak?
- How are you watching for and preventing delirium?
- How can the family help keep my relative calm and oriented?
- Is there a follow-up clinic to help with memories or low mood afterwards?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my treatment, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this treatment not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Is being sedated in intensive care the same as a coma?
Can my relative hear me while sedated?
Why does the team wake my relative each day?
What is ICU delirium?
Will they be in pain?
Why are the memories so strange afterwards?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: ICUsteps — Information for relatives (sedation and delirium) ICUsteps — Delirium information sheet (PDF) NHS — Sudden confusion (delirium) Faculty of Intensive Care Medicine — Guidelines for the Provision of Intensive Care Services (GPICS) ICUsteps — How might I feel after intensive care
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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