New Agitation on an Antipsychotic: Delirium, Akathisia, or Post-Traumatic Agitation?
Ms. K is 45, 5 weeks after a severe TBI from a fall, now on inpatient rehabilitation. Over 4 days she has become increasingly restless: pacing the unit, yelling at staff, striking out during transfers, and sleeping 3 hours nightly. The covering hospitalist started haloperidol 5 mg twice daily 3 days ago for 'agitation.' She also takes levetiracetam 1000 mg BID and has a history of anxiety. Exam shows bilateral cogwheel rigidity, constant foot shuffling when seated, dry mouth, and no focal deficits. Temperature is 37.8°C, HR 104. Urinalysis shows 10–20 WBCs; she has not had a bowel movement in 4 days and rates pain 7/10 at her surgical hip site. Family says 'this isn't her.'
1. What is your differential for her worsening behavior, and which features argue against simply escalating antipsychotics?
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The differential is broad and the temporal correlation matters.
- Delirium from a medical cause: urinary tract infection, constipation, uncontrolled pain, sleep deprivation, electrolyte abnormality, or seizure activity.
- Antipsychotic-induced akathisia and extrapyramidal symptoms: the foot shuffling, pacing, and cogwheel rigidity began after haloperidol was started and are classic. Akathisia is frequently misread as worsening agitation, prompting dose escalation and worsening.
- Post-traumatic agitation: plausible but a diagnosis of exclusion in this acute change.
- Neuroleptic malignant syndrome early: fever, tachycardia, rigidity - currently mild but must be watched.
- Serotonin syndrome if other serotonergic agents are added; review the full medication list.
Features arguing against escalation: the new temporal link to haloperidol, cogwheel rigidity, stereotypic foot movements, fluctuating mental status, and the family's report that this is not her baseline. Escalating the antipsychotic treats the side effect by worsening its cause. Also check CK, renal and hepatic function, and repeat vitals.
2. Outline your immediate and 72-hour management plan, including medication changes and nonpharmacologic strategies.
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Immediate (0–24 hours):
- Stop haloperidol. This is the inciting agent and the most likely driver.
- Check CK, electrolytes, glucose, renal and hepatic panels, CBC, urinalysis with culture, and review all medications for anticholinergic and serotonergic burden.
- Treat constipation aggressively; treat pain with acetaminophen and nonpharmacologic measures, avoiding anticholinergics.
- Low stimulus environment, consistent staff, sleep hygiene, structured daily schedule, family presence at known triggers, and a behavior plan agreed on by nursing and therapy.
24–72 hours:
- Reassess after the offending drug is cleared. If akathisia persists, low-dose propranolol is a reasonable option, monitoring heart rate and blood pressure. Avoid benztropine if possible because anticholinergic effects worsen cognition and delirium.
- If post-traumatic agitation persists after medical causes are treated, consider amantadine or propranolol with clear target symptoms and a defined taper plan.
- Track sleep, agitation episodes, and therapy participation daily rather than relying on global impressions.
- Reassess capacity for rehabilitation participation, not for global decision-making, unless a formal capacity question arises.
3. The nurse requests a PRN physical restraint and security presence. How do you respond?
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Use the least restrictive option that keeps her and staff safe, and treat restraint as a temporary bridge, not a treatment.
- First ask what the behavior is: is she striking out during transfers because of pain, fear, or poor communication? A transfer protocol with premedication, two-person assist, and predictable cuing may eliminate the need.
- If imminent danger exists, brief restraints or a security presence may be necessary under hospital policy, with continuous monitoring, a time limit, and documented justification. Never prone. Reassess frequently and remove as soon as possible.
- Do not use restraints as a substitute for treating delirium, pain, or akathisia. They increase agitation, delirium, and injury risk in TBI.
- Engage the team: nursing, therapy, family, and behavioral health should agree on triggers and a de-escalation plan. If staff fear injury, address staffing and environmental factors too.
- Reassess capacity specifically for the decisions at hand; agitation does not equal incapacity, but safety planning may require surrogate involvement.
The goal is to identify and remove the cause, not to sedate the patient into compliance.