Compare conditions

Put any two — or three — conditions side by side, adult or pediatric, to spot the look-alike differences fast, row by row.

Alcohol Withdrawal & Delirium Tremens

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In one line

·Delirium tremens is a brain emergency that strikes 2 to 4 days after the last drink, marked by severe confusion, seeing or hearing things that are not there, and an autonomic storm — the body's normal control over heart rate, blood pressure, and temperature collapses.

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Normal physiology

·GABA (the brain's main brake signal) and glutamate (the brain's main gas signal) together keep nerve cells firing at the right speed. Chronic heavy alcohol use suppresses glutamate and boosts GABA, so the brain fights back by removing some GABA receivers and adding more glutamate receivers. Keep that picture in your head, because when alcohol disappears suddenly, this adapted brain is left with too much gas and too little brake — that is the upstream break we are about to trace.

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What goes wrong

·The brain's chemical balance breaks when alcohol — the molecule that was holding the adapted system together — suddenly disappears. Imagine your car's engine has been tuned to run only with the parking brake halfway on. The mechanic removed some brake pads and boosted the engine to keep the car moving normally. Now someone suddenly releases the parking brake: the car lurches forward out of control. That is what happens in the brain during alcohol withdrawal. The GABA brake is weak, the glutamate gas is strong, and the sympathetic nervous system (the body's fight-or-flight alarm system, powered by the locus coeruleus in the brainstem, a tiny alarm center deep in the back of the brain that releases norepinephrine, and the medulla at the base of the brain that controls heart rate and blood pressure) explodes into action. Every nerve circuit fires too fast: thinking circuits in the prefrontal cortex (the front of the brain that guides clear thought) produce confusion, sensory circuits in the visual cortex (the back of the brain that processes what you see) and somatosensory cortex (the strip along the top that processes touch and body sensation) produce hallucinations, motor circuits in the cerebellum (the back lower part that smooths movement) and basal ganglia (deep brain structures that coordinate movement) produce tremor, temperature circuits in the hypothalamus (the brain's thermostat, deep in the center) produce fever, and heart and blood vessel circuits in the medulla produce racing pulse and high blood pressure. This is not one organ failing — it is the central control system losing its ability to regulate the entire body.

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Hallmark signs

·Confusion and disorientation
·Agitation and combativeness
·Visual, auditory, or tactile hallucinations
·Coarse tremor (shaking)
·Profuse sweating
·Fast heart rate (often over 100–120 beats per minute)
·High blood pressure (top number often over 160 mmHg)
·High fever (100.4–104°F or 38–40°C)

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Red flags · escalate now

·Temperature above 102.2°F (39°C) or continuing to rise despite cooling measures—signals severe autonomic instability and high risk of organ failure.
·New-onset seizures or any seizure lasting longer than 5 minutes—warns of possible progression to status epilepticus (a seizure that will not stop), a brain emergency requiring immediate intervention.
·Systolic blood pressure over 180 mmHg or heart rate over 140 beats per minute despite benzodiazepines—means sedation is inadequate and the patient is at high risk for stroke, dangerous heart rhythms, or cardiovascular collapse.
·Worsening confusion or decreased responsiveness after starting treatment—may indicate a second problem such as infection, head injury, hepatic encephalopathy (liver failure causing brain toxicity), or Wernicke encephalopathy from thiamine deficiency.
·Dark (tea-colored) urine, rising creatinine in blood tests, or tender, swollen muscles—suggests rhabdomyolysis, where muscle is breaking down and releasing toxins that can shut down the kidneys.

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Workup

·Comprehensive metabolic panel (CMP) plus magnesium and phosphate
·Blood alcohol level and urine drug screen
·Thiamine level (vitamin B1) — but always give thiamine immediately without waiting for the lab result
·Liver function tests (AST, ALT, bilirubin, INR) and complete blood count (CBC)
·Chest X-ray, urinalysis, and blood cultures if infection is suspected
·Head CT scan (without contrast dye) if the patient has new weakness on one side, a history of falling or hitting the head, or focal neurologic signs
·Electrocardiogram (ECG) to check for arrhythmias and QTc prolongation
·Arterial or venous blood gas if the patient has rapid breathing, low oxygen saturation (below 94%), or suspected acid-base disturbance

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Treatment

·IV benzodiazepines — lorazepam 2–4 mg IV every 5–15 minutes or diazepam 5–10 mg IV every 5–15 minutes, using a symptom-triggered protocol (guided by CIWA-Ar score) until the patient is calm, tremor stops, heart rate and blood pressure normalize, and CIWA-Ar score is below 10
·IV thiamine 500 mg three times daily for at least 3–5 days, started before or at the same time as any IV sugar (dextrose)
·IV magnesium sulfate 2 g over 15–30 minutes, then 1–2 g every 6 hours to keep blood magnesium above 2 mg/dL; also replace potassium (goal above 4 mEq/L), phosphate (goal above 2.5 mg/dL), and calcium (goal ionized calcium 4.5–5.3 mg/dL) according to lab results
·Phenobarbital loading dose 10–15 mg/kg IV (up to 1 gram total) or propofol infusion 5–50 mcg/kg/min if benzodiazepines alone do not control the agitation, hallucinations, or seizures
·Dexmedetomidine infusion 0.2–1.5 mcg/kg/h as an adjunct to benzodiazepines in the ICU
·Haloperidol 2–5 mg IV or IM every 30–60 minutes, only after the patient has received adequate benzodiazepines, and only to control severe hallucinations or agitation that persists despite GABA-enhancing agents
·Identify and treat the medical condition that triggered withdrawal: antibiotics for pneumonia or sepsis, IV fluids for dehydration, blood clot prevention (DVT prevention (prophylaxis) with heparin 5,000 units subcutaneous twice daily or enoxaparin 40 mg subcutaneous once daily), aspiration precautions (keep head of bed up at 30–45 degrees, suction airway as needed), and management of any trauma, bleeding, or surgical complications

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NCLEX trap

·Antipsychotics are helper drugs only — they do NOT fix the root problem. The real problem is that alcohol used to press the brain's brake pedal every day (it turned on GABA-A receptors, the main calming switches in the brain), and now that brake is gone. The gas pedal — glutamate, the brain's main go-go signal — is flooring it with no way to stop. Benzodiazepines are first because they press the brake pedal (they turn on the same GABA-A receptors alcohol used to hit) and slow the runaway gas pedal. Antipsychotics alone will NOT calm the autonomic storm — the racing heart, sky-high blood pressure, and fever — and they lower the seizure threshold, meaning they make seizures more likely to happen.
·Delirium tremens kills 5 to 15 people out of every 100 even with treatment, and far more without it. Start benzodiazepines and thiamine the moment you see the pattern: 2 to 4 days after the last drink, confusion, seeing or hearing things that are not there, shaking, heart rate over 100, high blood pressure, and fever. Waiting kills. The glutamate storm (the brain's gas pedal stuck to the floor) will not turn off by itself — it needs a brake, and that brake is a benzodiazepine.
·Seizures are just one piece of the danger. The real killer is the whole autonomic storm: racing heart, high blood pressure, high body temperature over 100.4°F or 38°C, and confusion. Benzodiazepines treat both the seizures and the root cause — the runaway glutamate (the brain's gas pedal) that drives every symptom. If you only treat seizures, you miss the storm that can collapse the heart, cook the brain, and shut down the kidneys.
·You must do a focused neurologic exam to catch confusion — does the person know who they are, where they are, what day it is? — coarse tremor (shaking hands and arms), agitation, and hallucinations (seeing or hearing things that are not real). Blood alcohol level is often zero in delirium tremens because the patient stopped drinking 2 to 4 days ago. The clinical picture — not the lab number — makes the diagnosis. Your eyes and hands are the diagnostic tools here.
·Delirium tremens needs repeated, escalating doses of benzodiazepines until the autonomic signs — heart rate, blood pressure, agitation — go away. The GABA system (the brain's brake system) is severely depleted. One dose will not refill it. Keep dosing, guided by the CIWA-Ar score (a 10-item checklist that scores withdrawal severity: tremor, sweating, anxiety, agitation, headache, nausea, hallucinations, and orientation) or vital signs, until heart rate, blood pressure, and agitation normalize. This may take hours to days. Stopping early lets the storm return and can kill the patient.

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