Excited Delirium Is Dead. The Patient Still Codes: A BLS and ALS Guide to Hyperactive Delirium With Severe Agitation

He ran for three blocks before they caught him. Then he fought — through the takedown, through the cuffs, through four officers and a knee across his shoulder blades. Witnesses said he was screaming about people who weren't there, stripping off his shirt in forty-degree weather, hot to the touch through the sweat. By the time your unit pulls up he has gone quiet. Face down. Cuffed. Still.

That quiet is not relief.

That quiet is the sound of a man who has run out of the ability to compensate, and if you read it as “he's finally calming down,” you are about to work a cardiac arrest you could have prevented.

This is the patient we used to file under “excited delirium.” The term is dead — buried by the AMA, the American College of Emergency Physicians, and the State of California, for reasons that are sound and overdue. But here is the hard part nobody on either side of that fight likes to say out loud: killing the label did not kill the patient. The physiology that put him face down and pulseless is real, it is lethal, and it does not care what we write on the run sheet.

This is a guide for both ends of the truck. BLS providers will own the first and most important interventions on this call — and most of them are things you do, or refuse to do, with your hands. ALS providers will own the chemistry, and the chemistry is a trap if you don't understand what it's actually doing.

Why We Stopped Calling It Excited Delirium

“Excited delirium syndrome” entered EMS and forensic vocabulary largely through a 2009 white paper from ACEP — a document that, for over a decade, gave the term a veneer of clinical legitimacy it never earned in the broader medical literature. It is not in the DSM-5. It is not a recognized diagnosis in the WHO's ICD. No psychiatric or neurological body ever adopted it as a discrete disease.

The reckoning came in stages. In June 2021, the AMA's Council on Science and Public Health adopted policy opposing “excited delirium” as a medical diagnosis and warning against the use of sedatives purely to facilitate law enforcement restraint without a medical indication. The American College of Medical Toxicology issued a position statement in May 2023 calling for an end to the term. Then in October 2023, ACEP formally withdrew its own 2009 white paper and stated the term should not be used in clinical practice or by physicians acting as expert witnesses. That same month, California became the first state in the nation to ban “excited delirium” as a cause of death on autopsy reports and as testimony, with the passage of AB 360.

Why the firestorm?

Because “excited delirium” had become the phrase written on death certificates after people — disproportionately Black men — died while being restrained by police. It was the cause of death cited in the case of Angelo Quinto, who died in Antioch, California in December 2020 after officers restrained him face down. It surfaced in the conversation around George Floyd. The term had drifted from clinical description to legal shield, a tidy diagnosis that explained a death and implicated no one.

So the medical community did the right thing and threw the label out. But notice what ACEP actually said when it withdrew the white paper: it simultaneously affirmed that hyperactive delirium with severe agitation is a real, potentially fatal clinical condition — a syndrome of profound agitation, altered mental status, autonomic instability, hyperthermia, and metabolic derangement. They didn't deny the patient. They renamed him and stripped away the forensic baggage.

That distinction is the whole point of this article.

What It Is Not

Start here, because the misconceptions kill faster than the disease.

It is not just a mental health crisis. This is the single most dangerous frame you can bring to the call. Yes, the patient may be psychotic. Yes, the dispatch may say “psych” or “EDP” or “violent subject.” But the patient who is hyperthermic, soaked in sweat, breathing 40 times a minute, and physically inexhaustible is not having a bad day — he is in a hypermetabolic medical emergency that happens to present with agitation. Treating this as a behavioral problem to be contained, rather than a physiologic catastrophe to be resuscitated, is how providers end up “managing the scene” while their patient quietly dies in the prone position.

It is not a diagnosis you write down. You will not document “excited delirium,” and increasingly you should not document the diagnosis at all in the field. You document what you see: severe agitation, altered mental status, hyperthermia, tachypnea, tachycardia, diaphoresis, and the events that preceded your arrival. Findings, not conclusions.

It is not the patient's fault, and it is not a reason to do less. The cynical history of the term — that it was used to explain away deaths in custody — cuts both ways for us. The danger now is overcorrection: that a generation of providers, rightly suspicious of the label, decides the whole thing was a myth and under-treats a genuinely dying patient. The term was junk. The death is not.

The Physiology: A Hypermetabolic Engine With No Off Switch

To treat this patient you have to understand what's driving him, because the driver dictates the disposition.

The classic substrate is stimulant toxicity — cocaine and methamphetamine most often. Work by Ruttenber and colleagues in the late 1990s on cocaine-associated rhabdomyolysis, and later neurochemical work summarized by Mash in Frontiers in Physiology (2016), points to dysregulation of the dopamine transporter system from chronic, heavy stimulant use. Dopamine isn't just about reward and movement; it's woven into the brain's thermoregulatory set point. Flood the system and lose the ability to clear it, and you get the clinical picture: manic agitation, paranoia, and a thermostat that has stopped working — hence the hyperthermia and the shedding of clothes in cold weather that shows up again and again in these cases.

But stimulants aren't the only road in. The same end-state — severe agitation with autonomic instability and hyperthermia — can be driven by acute psychosis in a patient off their antipsychotics, by sympathomimetic and hallucinogen toxidromes, and it shares dangerous overlap with neuroleptic malignant syndrome and serotonin syndrome. Different front doors, same burning building. That's why “what is it” matters less in the first ten minutes than “what is it doing to his chemistry.”

The Acidosis is the Engine, Not a Side Effect

Here is the part that ties the whole call together. A patient in this state is doing the metabolic equivalent of sprinting without stopping. Skeletal muscle burning at that rate outstrips its oxygen supply and shifts to anaerobic metabolism, dumping lactate. The result is a profound metabolic — specifically lactic — acidosis. Peri-arrest blood gases in restraint-associated deaths have documented pH values deep into ranges incompatible with sustained cardiac function.

The body fights back.

Two compensatory mechanisms are running flat out: the patient hyperventilates to blow off CO2 and buy back some pH, and the relentless catecholamine surge keeps the heart and circulation going. The thrashing, the screaming, the breathing like a freight train — that is not just agitation. That is compensation. That is the patient paying down an acid debt in real time.

Remember that, because the next two sections are about all the ways we accidentally stop him from paying it.

The Tipping Point: Why Restraint Turns a Crisis into a Code

The most rigorous explanation of how these patients actually die comes from the prone-restraint cardiac arrest literature — notably Steinberg's 2021 review in Medical Science and the Law and forensic work by Weedn and colleagues in the Journal of Forensic Sciences (2022). The mechanism they describe is not primarily asphyxia in the Hollywood sense. It is acidosis that crosses a threshold.

Picture the chemistry we just built. The patient is already carrying a massive metabolic acid load and is compensating by breathing hard and moving constantly. Now restrain him face down, with body weight across his back and shoulders. Two things happen at once. First, you mechanically restrict his ability to ventilate — the diaphragm and chest wall can't move freely against the floor and the weight — so CO2, instead of being blown off, climbs. Now a respiratory acidosis stacks on top of the metabolic one. Second, prone positioning with compression reduces venous return and cardiac output. The one pump that was holding the line starts to fail.

When the combined pH drops far enough, cardiac myocytes lose the ability to contract. The rhythm you get is not a shockable one — it's pulseless electrical activity sliding into asystole. Reviews of these deaths find the overwhelming majority — on the order of 90% — occurred in the prone restraint position. A 2025 analysis of sudden deaths during restraint in Sweden spanning 1992 to 2024 reinforces the same pattern across decades and systems.

This is why the National Association of EMS Physicians has, since 2002, classified prone restraint of agitated patients as a prohibited technique, a position since echoed across the major EMS bodies. It is not a comfort measure or a liability footnote. The prone position is, mechanically, the thing that converts a survivable hypermetabolic crisis into a code.

The operational translation is blunt: the struggle builds the acid debt; the restraint takes away his ability to pay it. Rhabdomyolysis adds a second bill — myoglobin and potassium pouring out of breaking-down muscle, and hyperkalemia is its own path to a lethal rhythm.

The Trap: Sedation Can Be the Thing That Kills Him

Now we arrive at the hardest question on the call, and it's the right one: if the patient is dangerous to himself, to us, and to bystanders, and if restraint is killing him — what do you actually do?

You sedate him. But you have to understand what sedation is doing, because done carelessly it finishes what the restraint started.

Go back to compensation. The patient's wild motor activity and his freight-train breathing are how he is holding off the acidosis. Chemical sedation, by design, takes both away. You quiet the agitation and you blunt the respiratory drive. If you sedate a profoundly acidotic patient and then walk away — or worse, leave him prone, or hobbled, or in a position where he can't ventilate — his CO2 climbs with nothing to stop it, the pH falls off a cliff, and you get the same PEA arrest, except now it happened after your intervention.

This is the single most important conceptual shift in the entire call: sedation is not the endpoint. It is the moment you take over the physiologic work the patient was doing for himself. The needle does not end the emergency. It transfers responsibility for his ventilation, his circulation, and his acid-base balance from his thrashing body to your monitoring and your hands.

That means a sedation order is also, automatically, an order to:

• Get him supine or on his side immediately — never face down. Position is intervention.

• Put oxygen on and get waveform capnography on. EtCO2 is your early-warning system for the CO2 climb that precedes the crash.

• Establish IV access and start fluids.

• Be ready to ventilate with a BVM and prepared to manage an airway.

• Anticipate a post-sedation arrest rather than be surprised by one.

If you are not prepared to do those things, you are not prepared to push the drug.

Chemical Sedation: Pick Fast, Dose Right, Be Ready to Bag

For the ALS provider, the goal is rapid, reliable sedation of a dangerous patient, achieved with an agent and a route that work before someone gets hurt — and with full respect for the airway risk that comes attached.

Ketamine is the workhorse when the scene is unsafe and you cannot get a line. Intramuscular dosing for severe agitation runs roughly 4–5 mg/kg IM (many systems use a fixed dose around 250 mg), with IV dosing of 1–2 mg/kg when access exists. Onset IM is fast — a few minutes. Ketamine tends to preserve respiratory drive and airway reflexes better than benzodiazepines, which is why it has become so popular for this exact patient. The catch is real and well documented: in Cole and colleagues' prospective prehospital work (Clinical Toxicology, 2016) and subsequent series, high-dose IM ketamine — particularly at 5 mg/kg — is associated with meaningful rates of post-administration intubation, in some studies approaching one in three. That has pushed many medical directors toward the lower end, around 4 mg/kg, while emphasizing the same rule: anyone giving high-dose ketamine must be ready to secure the airway. Watch for laryngospasm and hypersalivation.

Droperidol has come back from the dead, and a lot of protocols haven't caught up. The FDA's 2001 black box warning over QT prolongation effectively exiled it for years, but the 2020 emergency-medicine data showed clinically significant QT events and torsades to be rare at the doses used for agitation. ACEP's 2023 clinical policy on severe agitation gives a droperidol-plus-midazolam combination a Level B recommendation. A reasonable IM dose is 5 mg, with faster onset (5–10 minutes) than haloperidol. Routine pre-medication ECGs are no longer considered necessary for most patients, though they're still worth getting in those at high risk for QT prolongation.

Midazolam at 5 mg IM (or roughly 0.1–0.2 mg/kg) works, but benzodiazepines alone carry more respiratory depression and ACEP's policy specifically advises against monotherapy with a benzodiazepine when a better option exists.

The combination many EDs now favor is the “Fiver” — droperidol 5 mg, midazolam 5 mg, and diphenhydramine 50 mg IM — which in head-to-head work reached adequate sedation in a median of about 10 minutes versus 30 minutes for the older “B-52” (haloperidol 5 mg, lorazepam 2 mg, diphenhydramine 50 mg).

Whatever you choose, the principle holds: dose for fast and effective control, and treat the airway as a question of when, not if.

Run the Calls

Reading about this is not the same as deciding under load. The widget below drops you into four versions of this call. The medicine is the medicine whether you're BLS or ALS — what changes is which lever is in your hand.

After the Needle: The First Ten Minutes

Sedation buys you a window. Use it to resuscitate, not to relax.

Position and airway first. Supine or lateral recovery position, never prone, never hobbled. High-flow oxygen, waveform capnography, continuous SpO2 and cardiac monitoring. The rising EtCO2 is the canary; if it climbs and the patient is hypoventilating, start assisting ventilations with a BVM before the saturation craters.

Treat the chemistry. IV crystalloid addresses the volume deficit, the rhabdomyolysis, and the hyperthermia, and supports a circulation that's been running on catecholamines. If the patient is hyperthermic, start active cooling — this is a hyperthermic emergency, and temperature is a vital sign you must actually measure, not eyeball.

Anticipate the arrest. Watch for PEA. If the patient codes, the underlying problems are profound acidosis, hyperthermia, and likely hyperkalemia from rhabdomyolysis — so this is a resuscitation where treating the cause matters as much as the algorithm. Aggressive ventilation is the fastest way to address the respiratory component of the acidosis; the metabolic component is corrected by treating the cause. Sodium bicarbonate gets discussed for the profoundly acidotic or hyperkalemic peri-arrest patient, but it is a medical-direction decision rather than a reflex — and it does nothing if you haven't restored ventilation first. Hyperkalemia gets treated per your protocol.

Hand off the right way. The receiving ED needs to know what you saw and what you gave: the preceding struggle and restraint, the agitation and hyperthermia, the agent and dose and time, and your concern for acidosis, rhabdomyolysis, and hyperkalemia. They'll want a temperature, a lactate, a potassium, a CK, and a blood gas. Frame your report around the physiology, not the discarded label.

Who Does What

For the BLS provider, the lifesaving moves are almost entirely physical and immediate: recognize this as a medical emergency rather than a behavioral one, get the patient off his stomach and keep him off it, refuse to participate in or tolerate prone restraint, apply oxygen, begin cooling, and get ALS and rapid transport moving. None of that requires a drug, and all of it changes outcomes.

For the ALS provider, you own the chemistry and the airway: sedate early and decisively when the patient is a danger, then immediately pivot to ventilation, monitoring, fluids, and cooling as if you are running a resuscitation — because you are.

The Name Was the Easy Part

Burying “excited delirium” was the right call, and an easy one once the evidence was laid bare: a term with no diagnostic criteria, no home in any disease classification, and a track record of being deployed to explain away deaths that restraint helped cause. Good riddance.

But the work that's left is harder than renaming a syndrome. The patient who ran, fought, and went quiet in the prone position is still going to roll up on your shift, and the only thing that has changed is that we can no longer hide behind a phrase.

What keeps him alive is unglamorous and entirely within reach: recognize a hypermetabolic emergency for what it is, get him off his stomach and keep him there, sedate him when you must but treat that needle as the start of a resuscitation rather than the end of a problem, and support the breathing and the chemistry his own body was desperately trying to manage.

The term is dead. Make sure the patient isn't.

This article is for clinical education and does not replace your local protocols or medical direction. Drug doses reflect current published ranges and position statements as of May 2026; follow your agency's standing orders. Want to drill the decisions instead of just reading them? RXQuest builds the reps.

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