Neurology · Topic 21 of 22

Parkinson Disease in the Hospital

Neurology · neuromuscular and movement

Parkinson Disease in the Hospital

Give levodopa on the home schedule, never stop it abruptly, and avoid dopamine-blocking antiemetics and antipsychotics.

The core rule

Give PD drugs on home schedule

Parkinson medications are time-critical: order them at the patient’s exact home times (not “TID”), avoid substitutions and missed doses — even 5–30-minute delays worsen motor control.

01 · FirstGive PD drugs on home schedule

Parkinson medications are time-critical: order them at the patient’s exact home times (not “TID”), avoid substitutions and missed doses — even 5–30-minute delays worsen motor control.

02 · AvoidAvoid dopamine blockers: haloperidol, metoclopramide, prochlorperazine

Avoid dopamine-blocking drugs: haloperidol and all other typical and atypical antipsychotics except quetiapine, pimavanserin and clozapine, plus metoclopramide, prochlorperazine, promethazine and droperidol — they worsen parkinsonism.

03 · Watch forAbrupt withdrawal: parkinsonism-hyperpyrexia syndrome

Stopping or cutting levodopa (or DBS battery failure) can cause parkinsonism-hyperpyrexia syndrome: fever, severe rigidity, altered mental status, autonomic instability and high CK; it is potentially fatal. Restart dopaminergic therapy.

Causes & risk factors

Why it happens

Dysphagia drives aspiration pneumoniaWatch for dysphagia and aspiration pneumonia, which worsen when doses wear off; obtain a speech-language pathology swallow evaluation.

High delirium risk: limit sedatives and anticholinergicsHospitalized PD patients are prone to delirium and psychosis; limit benzodiazepines, opioids, hypnotics, anticholinergics and bladder antispasmodics.

Do right now

In this order

First moves

Give PD drugs on home schedule

→

NPO: levodopa by NG tube, not omitted

→

Avoid dopamine blockers: haloperidol, metoclopramide, prochlorperazine

Why each step

Give PD drugs on home scheduleParkinson medications are time-critical: order them at the patient’s exact home times (not “TID”), avoid substitutions and missed doses — even 5–30-minute delays worsen motor control.

NPO: levodopa by NG tube, not omittedDo not leave the patient NPO without PD drugs: give levodopa by nasogastric tube; if impossible, use a rotigotine patch or SC apomorphine (not one-to-one substitutes). Resume immediately after surgery.

Avoid dopamine blockers: haloperidol, metoclopramide, prochlorperazineAvoid dopamine-blocking drugs: haloperidol and all other typical and atypical antipsychotics except quetiapine, pimavanserin and clozapine, plus metoclopramide, prochlorperazine, promethazine and droperidol — they worsen parkinsonism.

Management

Orders

Psychosis or delirium: quetiapine, pimavanserin, clozapine must knowIf an antipsychotic is needed, use quetiapine, pimavanserin or clozapine — they do not aggravate parkinsonism; clozapine needs neutrophil monitoring for agranulocytosis.

Nausea: ondansetron or trimethobenzamideFor nausea use ondansetron, granisetron, dolasetron or trimethobenzamide; domperidone is not available in the US.

Mobilize early with physical therapyMobilize as soon as safe with physical therapy: rigidity, freezing and postural instability raise fall and pressure-injury risk, and orthostatic hypotension is common.

Perioperative: dose until surgery, restart right afterGive PD medications up to the start of surgery and restart immediately afterward; involve anesthesia early — metoclopramide, haloperidol and ketamine are avoided periprocedurally, and regional anesthesia is preferred when feasible.

Red flags & don'ts

Avoid harm

Apomorphine plus ondansetron: profound hypotension interactionApomorphine is contraindicated with 5-HT₃ antagonists (ondansetron, granisetron) because of profound hypotension and loss of consciousness; use trimethobenzamide and give apomorphine SC only.

MAO-B inhibitor: no meperidine or tramadol interactionWith selegiline or rasagiline, avoid meperidine, tramadol, methadone and cyclobenzaprine (serotonin toxicity risk); tell anesthesia about the MAO-B inhibitor.

Parkinsonism- or dyskinesia-hyperpyrexia?

Commonly confused

Trigger	Dopaminergic withdrawal or DBS battery failure
Motor picture	Severe rigidity and tremor
Shared features	Fever, high CK, altered mental status
Fix	Restart dopaminergic therapy

More detail

Reference

Show 4 reference facts

Manage parkinsonism-hyperpyrexia with cooling, IV fluids, treatment of the trigger, benzodiazepines for agitation and ICU care for organ failure, while restarting oral or NG dopaminergic therapy.

Sudden discontinuation or dose reduction of amantadine, like levodopa, can rarely provoke a neuroleptic malignant–like syndrome.

Use the patient’s own supply until the hospital stocks the exact formulation (controlled-release levodopa, entacapone combinations) and notify the patient’s neurologist.

Dopamine agonists can cause impulse control disorders (gambling, shopping, hypersexuality), hallucinations and sudden sleep attacks.

Pearl

On time, every time — a missed levodopa dose can cost the patient their swallow, their mobility, or their life.

Sources · Parkinson’s Foundation — Parkinson’s Disease Hospital Care Fact Sheet (rev. 2023), incl. medications that may be contraindicated · Practical Neurology — Inpatient Management of Parkinson’s Disease (2014) · NSW Health Safety Notice 025/23 — Medication management in Parkinson disease (Sept 2023) · Merck Manual Professional — Parkinson Disease · Wang JY et al. Parkinsonism-Hyperpyrexia Syndrome and Dyskinesia-Hyperpyrexia Syndrome in Parkinson’s Disease: Two Cases and Literature Review. J Parkinsons Dis 2022;12:1727–1735 · Apokyn (apomorphine) injection prescribing information — DailyMed · American Geriatrics Society 2023 Updated AGS Beers Criteria (Table 3, drug–disease interactions: Parkinson disease). J Am Geriatr Soc 2023;71:2052–2081 · Beckers M et al. Discontinuation or acute unplanned cessation of oral dopaminergic medications in persons with Parkinson’s disease: a practice review. J Parkinsons Dis 2025 · Starter sheet built from the verified AGACNP fact map (facts reviewed 2026-10-15).