A medically induced coma is a reversible state of deep unconsciousness created with sedative medications to reduce brain activity and help protect the brain.
It may be used for severe traumatic brain injury, refractory status epilepticus, and alongside temperature management after cardiac arrest.
Patients are closely monitored and usually require mechanical ventilation while the coma is maintained.
Awakening is gradual and may involve early responses, confusion, agitation, delirium, and progressive recovery of awareness.
Potential complications include withdrawal effects, delirium, seizures, infections, and medication-related toxicities.
Recovery and survival vary considerably depending on the underlying condition, illness or injury severity, complications, coma duration, and response to treatment.

Introduction

While a coma is perceived to be a scary event with a high chance of mortality, under the right circumstances, it may just save a person’s life.

The article below aims to explore what a medically induced coma is, when a healthcare practitioner might prescribe one, and how it might help to enhance recovery outcomes in the intensive care unit.

What Is a Medically Induced Coma?

A medically induced coma is a reversible state of deep unresponsiveness that is brought about by sedative administration in an attempt to protect the brain from traumatic damage. The sedatives trigger unconsciousness by suppressing various aspects of brain activity. This helps to lessen the energy requirements associated with conscious activity, enabling it to mitigate secondary brain injury. Occasionally, doctors may resort to using targeted temperature management or therapeutic hypothermia to help achieve or complement the effects of a medically induced coma.

There are varying degrees of unresponsiveness that a person in a coma may experience. Doctors use the Glasgow Coma Scale to assess a patient’s level of consciousness. This is commonly used in emergency medicine. It considers whether the patient can open their eyes, move, speak, and respond, giving doctors an idea of the severity of coma, regardless of whether it stems from traumatic brain injury or some other cause. This can indicate whether the patient is in a coma already.

Healthcare specialists typically monitor the patient in a medically induced coma by running a series of simple tests that assess their level of responsiveness, including their response to simple commands, physical stimuli, and involuntary reflexes, such as pupillary, cough, and gag reflexes.

It is usual for a person in a coma to lose their cognitive abilities and lack normal sleep-wake patterns, yet retain brain activity pertaining to vital functions required for their survival, such as regulating their heartbeat.

Medically Induced Coma vs. Natural Coma, Sedation, Anesthesia, Vegetative State, and Brain Death

A medically induced coma can seem very similar to a natural coma, heavy sedation, anesthesia, a vegetative state, or brain death. The differences are discussed briefly below:

Natural Coma

A medically induced coma differs from a natural coma, which is a state of profound unresponsiveness caused either by external physical injury (traumatic coma, e.g., severe TBI) or an internal medical event (non-traumatic coma, e.g., stroke or cardiac arrest). Even when a patient is already in a traumatic coma, clinicians may still administer sedatives to induce a deeper pharmacological state to help manage brain swelling or intracranial pressure.

Sedation

Medically induced comas can be difficult to distinguish from sedation, particularly as sedatives are often used to achieve them. Medically induced comas may be viewed as the ultimate form of sedation, resulting in complete and prolonged unconsciousness. Normal forms of sedation typically attempt to lower arousal in a patient and calm down the nervous system, which may be considered a mild or partial suppression of specific aspects of consciousness. Patients are most often semi-conscious rather than unconscious when they are sedated. Patients who are heavily sedated may experience confusion or be unable to respond normally due to feeling either extremely drowsy or disconnected.

General Anesthesia

General anesthesia may be viewed as a temporary, medically induced coma that is achieved using similar medications with the intention of preventing pain and awareness while reducing reflex responses during surgical procedures. While the two states are very similar, experts often point out that anesthesia and a drug-induced coma are distinct states of unconsciousness that result in different patterns of brain activity, with a medically induced coma being considered a more intensive state than general anesthesia. Anesthesia generally causes amnesia. However, some studies have shown that faulty administration may not fully suppress consciousness, resulting in unexpected sensations of pain.

Vegetative State

It may seem similar to a coma, yet the patient has no conscious awareness despite showing signs of wakefulness. While they are unable to move voluntarily, they are still able to respond to a variety of stimuli, such as pain or sound.

Brain Death

It refers to a state where the brain stops working entirely, rendering the person unconscious and unable to survive without life support. Specific criteria are used by physicians to establish brain death.

Use Cases and Potential Benefits of Induced Coma

Why Is a Person Put in a Medically Induced Coma?

A medically induced coma is often only used as a last, life-saving resort in the intensive care unit. A coma is medically induced to protect brain function in cases of traumatic injury. While traumatic brain injury is one of the main reasons for inducing a medically induced coma, its use can extend to other conditions that can lead to brain damage. For instance, a patient may be placed in a medically induced coma when they need to be on a ventilator to assist breathing during severe lung illness.

An induced coma may be utilized in the following scenarios:

Induced Coma After Cardiac Arrest Following a Heart Attack

Cardiac arrest, following a heart attack, can lead to a spontaneous coma. In such a scenario, comatose patients can be placed in continuous sedation (medically induced coma) during targeted temperature management. As anesthetics can affect cardiovascular function, careful monitoring is required. Earlier studies found that mild hypothermia could improve neurological outcomes and reduce mortality in some patients in a coma after successful resuscitation from cardiac arrest. However, based on recent studies, its benefits compared with normothermia for improving neurological outcomes and survival remain uncertain.

Medically Induced Coma for Seizures and Status Epilepticus

In Status Epilepticus, a potentially life-threatening condition, a seizure lasts longer than 5 minutes. It is not unusual for prolonged seizures to occur after traumatic brain injury or cardiac arrest. In severe cases of status epilepticus, the doctor may resort to treating a patient with a medically induced coma. In one retrospective study, early coma induction was associated with reduced seizure duration and a quicker resolution of the condition, as indicated by shorter hospital stays and time spent in the ICU.

Medically Induced Coma in Pediatric Cases

Medically induced comas are also used in children, most often for severe traumatic brain injury (TBI) and refractory status epilepticus, when first-line treatments (positioning, sedation, CSF drainage, hyperosmolar therapy) fail to bring the condition under control.

In pediatric severe TBI, high-dose barbiturate coma therapy is reserved for children with refractory intracranial hypertension who remain hemodynamically stable enough to tolerate treatment. It has been shown to reduce intracranial pressure significantly within 5 hours of treatment, with 82% of patients achieving a favorable outcome (good recovery or moderate disability). A larger cohort study similarly found the treatment effective at lowering ICP, though it reported a mortality rate of 20.3%.

For sustained refractory status epilepticus, barbiturate coma may be considered when seizures continue despite treatment with multiple anti-seizure medications, achieving short-term seizure cessation in 72% of cases. However, complications were common in this population, including hypotension requiring medication support (79%), ventilator-associated pneumonia (59%), and sepsis (17%).

Pediatric guidelines caution that supporting evidence for this approach is more limited in children than in adults, and treatment protocols call for closer monitoring due to differences in how children respond to prolonged sedation.

Other Reported Uses

During the COVID-19 pandemic, deep sedation and drug-induced coma were reported in mechanically ventilated patients with severe COVID-19, particularly those with COVID-19-associated ARDS (Acute Respiratory Distress Syndrome).

The Milwaukee protocol for rabies included therapeutic (medically induced) coma along with other treatments. However, subsequent reports have documented treatment failures, and its effectiveness remains uncertain.

Real-World Examples

Real-world cases have also brought attention to medically induced coma. In 2017, football player Ryan Swoboda was placed in a medically induced coma for three days after collapsing from severe heatstroke during practice. In 2025, Mexican actor Manuel Masalva required urgent surgery and was placed in a medically induced coma after an aggressive bacterial infection spread to his lungs. In the same year, Nottingham Forest footballer Taiwo Awoniyi was placed in an induced coma after requiring urgent surgery for a serious abdominal injury sustained during a match.
Similarly, Earth, Wind & Fire drummer John Paris was reported to have been placed in an induced coma following a cardiac incident in August 2026, while doctors provided critical care.

How a Medically Induced Coma Works

A medically induced coma follows similar principles to a natural coma, as described below:

How a Coma Can Protect the Brain

In an ordinary coma, brain networks involved in generating consciousness are impaired, usually as a result of compromised brain oxygen and increased pressure inside the cranium due to injury, infection, or toxicity. Many patients in a coma due to brain injury have brainstem dysfunction along with nerve cell disruption. Lowered brain oxygen and glucose disrupt brain energy production, causing increased neurologic excitation and firing, a higher seizure risk, inflammation release, and neuronal cell death. This causes the brain to shut down due to metabolic failure, resulting in a coma in which neuronal firing is slower and greatly reduced. Depending on the cause, it may also promote secondary waves of brain injury that can manifest hours to days after the coma begins. Patients in a coma may thus still show measurable brain activity associated with arousal and consciousness and may have seizures. The degree of primary structural damage and the severity of secondary injury influence how well the patient is able to recover. These factors also explain the rationale for using a medically induced coma to help protect the brain and limit further injury.

Effectiveness of Medically Induced Coma as a Treatment

The drugs used to induce a medical coma typically work by suppressing the networks used to generate consciousness, allowing the brain to enter a reduced state of activity. Their efficacy depends on the patient, their condition, and the sedative used. In selected conditions, such as refractory status epilepticus or intracranial hypertension, anesthetic drugs may have additional neuroprotective effects by suppressing seizures, reducing cerebral metabolic demand, and helping to limit secondary brain injury. For example, barbiturates can reduce cerebral metabolic activity and blood flow, which can help lower intracranial pressure in patients with refractory intracranial hypertension. On the other hand, barbiturates may be associated with late awakening and complications such as low blood pressure, infections, and prolonged mechanical ventilation.

How a Medically Induced Coma Is Sustained

Anesthetics such as isoflurane and propofol, high-strength GABAergic medications such as midazolam, and/or barbiturates are used to induce a coma. The sedative is continuously administered to keep the patient unconscious in an attempt to minimize brain injury. The patient is continuously monitored to ensure they are still unconscious and sufficiently medicated to maintain the coma. Top establishments often make use of EEG equipment to monitor the patient’s brain state of arousal, while some automated systems that can administer medication as required are still being investigated. The patient is often also administered other medications to stop seizures, manage blood pressure, and keep the heart beating regularly. As sedatives are withdrawn, the brain activity gradually changes, and the patient slowly wakes up from the artificial coma.

Can someone in a medically induced coma breathe on their own?

A person in a medically induced coma usually requires the respiratory assistance of a ventilator to breathe, as the sedatives used to sustain the coma suppress normal breathing function.

How Long Does a Medically Induced Coma Last?

Refractory status epilepticus: Guidelines suggest 24-48 hours, based on expert opinion.
Severe TBI with refractory intracranial hypertension (Adults): Typically about 3-4 days (median), can range between 2-12 days.
Severe TBI with refractory intracranial hypertension (Children): About 4-4.5 days, with a range of about 1-14 days.
Cardiac arrest (patients already unresponsive from arrest): Deep sedation is used during temperature management and lasts about 28-40 hours of sedation in trial protocols.

Stages of Anesthesia or Heavy Sedation in a Medically Induced Coma

In anesthesia, states of unresponsiveness are known to progress in four stages:

Pain Relief or Disorientation

Medications are given that render the patient unconscious after taking effect.

Excitement or Delirium

Involuntary movements, behaviors, muscle spasms, and reflexes occur during this stage, which ceases when the dosing scales up toward stage 3.

Surgical Anesthesia

This is the optimal dose required for surgery and is reached when the muscles relax, and involuntary reflexes, such as the pupillary light reflex, cease to function. The patient can be considered in a coma at this stage.

Overdose

When too much anesthetic is administered, vital functions such as breathing stop. Mechanical ventilation and other medications to regulate cardiovascular function and blood pressure become necessary at this point.

Unlike a conventional surgical scenario, the patient may require a medically induced coma when they are already in a state of physical trauma. This tends to mask stages 1 and 2, as the patient may already be unconscious or suffering from disorientation, overstimulation of the nervous system, seizures, and/or involuntary spasms, reflexes, and movements. The deeper third stage can be used to induce an artificial coma that might help to protect the brain under such conditions.

Coming Out of a Medically Induced Coma: The 3 Stages

Unlike general anesthesia, coming out of an artificial coma does not generally take between 2 and 24 hours, as the patient is often unconscious for several days to months and becomes physically dependent on sedatives.

Drug Withdrawal and Early Responses

The physician will slowly wean the patient off the sedatives. They may only begin to regain consciousness a few days after administration completely ceases, depending on the duration of the coma. The first signs of consciousness tend to be basic responses of the patient, in which they respond to simple cues such as light or sound and may be able to follow simple commands, such as blinking when asked or moving a limb. The responses tend to be slow and inconsistent, becoming more certain with time.

Confusion, Agitation, and Delirium

After some time, the patient may progress to the next stage in which they may feel agitated and/or confused, a state indicative of temporary delirium. They tend to be uncertain of who they are, where they are, or how they got there. They may become agitated, act out, yell, or strike out. If they pose a risk of injury to themselves or accidentally remove medical devices, protective measures such as restraints may be occasionally used.

Sometimes, sedation may be temporarily resumed or adjusted if agitation becomes severe.

In patients recovering from moderate-to-severe traumatic brain injury, post-traumatic amnesia (PTA) may also occur after emergence from coma. During PTA, patients may experience confusion, disorientation, impaired attention, and problems with memory, including difficulty forming or recalling memories.

Re-Emergence and Recovery

Eventually, they reach the final stages, where they are more conscious, respond without difficulty, and are not delirious, yet they may still suffer from neurologic symptoms. Problem-solving, judgment, decision-making, and physical safety may be impaired. Depending on the duration of the coma and the condition of the patient, they may remain in one stage or recover fully without any complications. If recovery is possible, it is not certain how long the process will take.

Safety Profile: Side Effects, Complications, and Contraindications

Medically induced comas can be an effective way to save a person’s life, protect the brain from further damage, or manage severe critical conditions. Due to the effects long-term sedation can have on the brain, an induced coma is not without side effects.

Side Effects

The side effects of being in a coma are treated during the recovery phase. These can include physical weakness, disorientation, amnesia, difficulties either sleeping or staying awake, and issues pertaining to various aspects of cognition, such as comprehension and speech. Withdrawal from the sedative medications used to induce coma is one of the most common side effects. Patients may experience withdrawal effects as a result of abruptly needing to stop medications such as antipsychotics they were taking before the coma as well. They may additionally require treatment for respiratory infections or UTIs.

Complications

Long-term side effects of medically induced coma may resolve with appropriate treatment and prevention strategies or may be lifelong. The most prevalent ones are as follows:

Delirium

Some patients who have taken high doses of coma-inducing sedatives go on to acquire delirium and similar states of altered cognition. Studies reveal that this is also likely a result of individual reactions to these drugs, pertaining to the inflammatory and neurologic profile of the patient in question. One study revealed that delirium is associated with higher levels of interleukin-6, which is a specific type of inflammatory compound linked to chronic disease.

Severe withdrawal

Severe withdrawal effects from sedatives or other medications, including antidepressants, antipsychotics, or pre-prescribed sedatives, are likely to compound the side effects associated with a medically induced coma. The patient may experience cognitive difficulties long after recovery and require assistance when resuming their prior medical prescriptions.

Seizures

Occasionally, seizures may develop when coming out of a coma. This is more of a concern for a patient who was placed in a coma in order to treat severe epilepsy. Sometimes seizures in an epileptic patient are not successfully treated by a medically induced coma, with the seizures resuming after sedation stops. In some cases, this can increase the risk of further brain injury.

Overdose-related syndromes and toxicities

Being administered certain types of anesthetic drugs via IV drip can cause systemic toxicities that are potentially fatal. Propofol-related infusion syndrome is one example. The physician will decide which anesthetic is the most appropriate for treatment, considering the potential risk of such complications.

Contraindications

As medically induced comas are often used to save someone’s life in an emergency, they are often not deemed contraindicated in circumstances that warrant their appropriate use. However, they may be contraindicated in a patient who is allergic or highly reactive to the sedative agent, in which case, treatment may serve to hinder their condition or increase the risk of mortality.

Prognosis, Recovery and Survival Rate

Induced Coma Prognosis

Recovery from a medically induced coma is possible because it is intentionally produced with medications and can be reversed when clinically appropriate. However, the outcomes vary widely depending on the areas of the brain affected, the condition being treated, the severity of the illness or brain injury, any treatment complications, and the extent to which secondary injury can be prevented. This can sometimes be assessed through EEG testing. Patients who remain in a medically induced coma for a longer period tend to have a poor prognosis. Risk factors for longer coma durations include older age, kidney insufficiency, and systemic shock. If unresponsiveness lasts for weeks to months after the medication is withdrawn, the patient may suffer from lifelong disability, be in a vegetative state, or pass away. The types of medications administered and whether cooling was also used or not can also affect the outcome. Hypothermia has not been shown to improve survival or functional outcome in cardiac arrest or convulsive status epilepticus.

Optimizing Medically Induced Coma Recovery

Medical experts are trained to monitor the patient throughout the entire process to minimize the risk of complications. Keeping the patient at a cooler temperature may help minimize potential brain damage and maximize recovery. During recovery from a medical coma, placing personal objects around the patient, as well as encouraging social visits and support from family and friends, can help to reduce disorientation in susceptible patients. Depending on the length of the coma and the patient’s condition, rehabilitation may include the need for physiotherapy and/or an adequate exercise routine. It is advisable to ensure strict sleep hygiene, which demands setting a bedtime, lowering activity before bed, and getting sufficient daylight exposure. If the brain is damaged, the patient may need to relearn basic life skills, demanding occupational therapy. Ubiquinol and certain B vitamins may support nerve function and neurological recovery, although evidence for their effectiveness in patients recovering from medically induced coma remains limited.

What Is the Survival Rate After a Medically Induced Coma?

Survival after a medically induced coma varies depending on why it was needed and how the patient responds. In refractory status epilepticus, a 2024 systematic review found survival around 89% when seizures were related to epilepsy, but only around 57% when caused by another underlying illness. Survival estimates vary by study. A 2020 study found that in severe traumatic brain injury with refractory swelling, survival to discharge is seen in roughly half of patients, while an earlier 2010 study of 55 patients found 40% survival to discharge. In severe TBI, outcomes have also been associated with how quickly the brain pressure responds to treatment.

Conclusion

A medically induced coma renders a person reversibly unconscious on anesthetic sedatives in an attempt to minimize damage, trauma, and pain. It is mostly used as a last resort in the ICU to treat patients with traumatic brain injury, prolonged seizures, or after cardiac arrest. When in a coma, the brain uses less energy and stands a better chance of recovering from oxygen loss and injury. The prognosis tends to vary from patient to patient, depending on the cause and severity of the injury (reflected by the degree of stabilization required).

Frequently Asked Questions

What does a medically induced coma feel like, and do you dream?

Coma survivors often describe experiencing a hazy state, lingering with memories or sensory perceptions. Patients may remember certain sensations after regaining consciousness, such as cold, pain, or thirst felt during the comatose state. They may also experience dreams while comatose.

Can a person in a medically induced coma hear?

A person in a medically induced coma may still respond to some sounds at the brain level, even without conscious awareness. Studies of general anesthesia and deep sedation have found that auditory stimuli can still produce measurable brain responses. However, this does not mean that the person consciously hears, understands, or remembers what is being said.

Can you talk to someone in a medically induced coma?

Yes, you can talk to someone in a medically induced coma if permitted by the healthcare team. Speak calmly, use their name, discuss familiar topics, and offer reassurance. In a natural coma after brain injury, family auditory stimulation has been studied as a way to promote recovery of consciousness. However, in a medically induced coma, sedation is intentional, so talking is not intended to increase consciousness or wake the person.

What happens if the patient does not wake up on schedule?

Some people may take longer to wake after deep sedation is stopped. Doctors may assess neurological responses and other factors associated with delayed awakening.

Could a tracheostomy be considered?

If prolonged mechanical ventilation is needed during a medically induced coma, a tracheostomy may be considered.

Why might doctors place a patient into a medically induced coma after emergency intestinal surgery?

Severe complications after emergency intestinal surgery, such as abdominal sepsis and intra-abdominal hypertension, may require mechanical ventilation and deep sedation. In critically ill patients, deep sedation may sometimes be needed to support intensive care treatment.

What happens if a medically induced coma has serious complications?

In some cases, particularly when the underlying condition is severe or complications develop, the patient may pass away while receiving treatment. This does not necessarily mean that the medically induced coma itself caused the death.

How are regular medications given during a medically induced coma?

Since the patient cannot swallow, necessary medications can be given through a feeding tube or intravenously, depending on the medication and the patient’s condition.

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Related Video

Medically Induced Coma: How It Works

A medically induced coma is a controlled intervention used in critical conditions to reduce brain activity, manage swelling, and support recovery under close medical supervision.

Video Added on February 26, 2025

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The Mya Care Editorial Team comprises medical doctors and qualified professionals with a background in healthcare, dedicated to delivering trustworthy, evidence-based health content.

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Dr. Rae Osborn has a Ph.D. in Biology from the University of Texas at Arlington. She was a tenured Associate Professor of Biology at Northwestern State University, where she taught many courses to Pre-nursing and Pre-medical students. She has written extensively on medical conditions and healthy lifestyle topics, including nutrition. She is from South Africa but lived and taught in the United States for 18 years.

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Published: 07 Jul 2023

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Medically Induced Coma: What It Is, How It Works & Recovery

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