Compare conditions

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

Neuroleptic Malignant Syndrome

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In one line

·High fever plus stiff muscles that feel like lead pipes plus confused brain plus wild body signs plus high muscle enzyme after antipsychotic drugs.

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Normal physiology

·Healthy brain: balanced neurotransmitter tone keeps mood, thinking, seeing, and actions in range. Hold this picture. Every bad finding makes sense as a break from it.

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What goes wrong

·The brain part that stops stress IS the brain part that gets hurt by stress. Bad life stuff makes it much worse.

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Hallmark signs

·Very stiff muscles all over the body (lead-pipe rigidity)
·High fever (often 102–106 °F)
·Confusion or can't think clearly (altered mental status)
·Fast heart rate and blood pressure swings (autonomic instability)
·Very high creatine kinase (CK) in the blood
·Sweating heavily
·Trouble swallowing or drooling
·Tremor or slight shaking

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Red flags · escalate now

·Fever above 104 °F — can cause seizures, brain damage, or death if not cooled quickly
·Very confused, sleepy, or unresponsive — means the brain is in danger
·Dark brown urine (from muscle breakdown) — can clog and destroy the kidneys
·Trouble breathing or chest pain — heart or lungs may be failing
·Blood pressure or heart rate all over the map — autonomic system is crashing

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Workup

·Creatine kinase (CK) blood level
·Basic metabolic panel (BMP) with creatinine and blood urea nitrogen (BUN)
·Complete blood count (CBC) with white blood cell count
·Serum myoglobin or urine myoglobin
·Liver enzymes (AST, ALT)
·Electrolytes (sodium, potassium, calcium, magnesium, phosphate)
·Lumbar puncture (spinal tap) and head CT or MRI if confusion is severe

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Treatment

·Stop the antipsychotic drug immediately and remove all other medicines that block dopamine D2 receptors (such as metoclopramide or prochlorperazine)
·Cool the body aggressively with ice packs to the groin, armpits, and neck; cooling blankets; and cold intravenous fluids
·Give intravenous fluids rapidly (often 200–300 mL per hour of normal saline) to flush myoglobin out of the kidneys and prevent kidney failure
·Give bromocriptine 2.5 mg by mouth or feeding tube every 8 hours, then increase up to 10–20 mg every 8 hours if needed
·Give dantrolene 1 mg per kilogram intravenously, then repeat every 6 hours up to a total of 10 mg per kilogram per day if muscle rigidity stays severe
·If fever, rigidity, and confusion do not improve after 24 to 48 hours of medicines and cooling, perform electroconvulsive therapy (ECT)
·Wait at least 2 weeks (often longer) before restarting any antipsychotic. When ready, choose a lower-potency or atypical antipsychotic (such as quetiapine or clozapine, which block D2 less tightly) at the lowest effective dose, and pair with stable housing, therapy, sleep support, and close monitoring.

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NCLEX trap

·Fever medicine does not work here because the brain's thermostat — the hypothalamus (the part of the brain that sets body temperature) — is broken by the antipsychotic drug blocking dopamine, not raised by infection. You need to cool the body from the outside with ice packs, cooling blankets, and lots of IV fluids. And you must stop the antipsychotic drug right away.
·Neuroleptic Malignant Syndrome causes lead-pipe rigidity — muscles so stiff they feel like a heavy metal pipe when you try to move them — not the tremor you see in Parkinson's disease. When you see stiff muscles plus high fever plus a confused or unresponsive mind, that is a life-threatening emergency. The patient needs to go to the hospital immediately, not be managed at home.
·Stop the antipsychotic drug the moment you suspect Neuroleptic Malignant Syndrome. Keeping it going makes the muscles break down faster, the kidneys fail, and the patient can die. Get the patient medically stable first. If an antipsychotic is truly needed later, wait at least 2 weeks, then restart with a newer drug (an atypical antipsychotic) at a much lower dose and watch closely.
·Neuroleptic Malignant Syndrome causes rhabdomyolysis — the muscles break down and release myoglobin (a protein from muscle cells) into the blood. Myoglobin clogs the kidneys like sludge in a pipe and causes kidney failure. You need aggressive IV fluids — 3 to 4 liters a day — to flush the myoglobin through the kidneys and out in the urine before it does permanent damage. Watch the urine color (should lighten from dark brown to yellow) and the creatinine (kidney function number) closely.
·The altered mental status in Neuroleptic Malignant Syndrome is caused by the basal ganglia (the deep brain structures that control movement and temperature) and the brainstem (the base of the brain that runs the body's autopilot) failing because the antipsychotic drug blocked dopamine (the brain messenger that powers movement and temperature control). This is not psychosis. It is a medical emergency that needs immediate cooling, stopping the drug, and ICU-level monitoring.
·Neuroleptic Malignant Syndrome kills 10 to 20 out of every 100 people who get it if not treated fast. Start bromocriptine (a drug that replaces dopamine's signal) or dantrolene (a drug that stops muscles from contracting so hard) immediately after you stop the antipsychotic and begin cooling. Waiting lets the muscle breakdown and kidney failure get worse and harder to reverse.

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