Management of Increased Agitation
For acute agitation in the emergency department, use either a benzodiazepine (lorazepam or midazolam) or a conventional antipsychotic (haloperidol or droperidol) as first-line monotherapy, but avoid midazolam in older adults due to excessive adverse event risk. 1, 2
Initial Assessment and Safety
Before any pharmacologic intervention, attempt verbal de-escalation as the first-line treatment 1, 3. This includes:
- Ensuring adequate lighting and orientation
- Explaining to the patient where they are and your role
- Exploring concerns and anxieties
- Removing unnecessary tubes, lines, and equipment 4
Immediately identify and treat reversible causes:
- Hypoxia
- Hypoglycemia (point-of-care glucose test mandatory)
- Urinary retention
- Constipation
- Bowel obstruction
- Infection
- CNS events
- Medication effects or withdrawal (benzodiazepines, opioids, anticholinergics)
- Metabolic derangements 5, 4, 1
Critical caveat: In anticholinergic or sympathomimetic toxicity, antipsychotics can worsen agitation due to their anticholinergic properties 1.
Pharmacologic Management Algorithm
For Undifferentiated Agitation (Emergency Department)
First-line monotherapy options 1:
- Lorazepam 2-4 mg IM/IV OR
- Haloperidol 5 mg IM/IV OR
- Droperidol IM/IV (if rapid sedation required - more effective than haloperidol) 1
For cooperative patients able to take oral medications:
- Lorazepam 0.5-1 mg PO + Risperidone (oral combination) 1
If monotherapy fails:
- Combination of parenteral benzodiazepine + haloperidol produces more rapid sedation than monotherapy 1
For Delirium-Related Agitation
Able to swallow 4:
- Haloperidol 0.5-1 mg PO at night and every 2 hours PRN
- Titrate in 0.5-1 mg increments (max 10 mg daily, 5 mg in elderly)
- For severe distress or immediate danger: start with 1.5-3 mg
- Add lorazepam 0.5-1 mg if agitation persists despite haloperidol
Unable to swallow 4:
- Levomepromazine 12.5-25 mg SC (6.25-12.5 mg in elderly), then hourly PRN
- Maintain with SC infusion 50-200 mg over 24 hours
- Add midazolam 2.5-5 mg SC every 2-4 hours if needed
Important note: Do NOT routinely use antipsychotics for delirium treatment - reserve for patients with significant distress, hallucinations, delusions, or risk of harm 6. The undesirable effects outweigh benefits for most patients.
For Anxiety Without Delirium
Able to swallow 4:
- Lorazepam 0.5-1 mg PO four times daily PRN (max 4 mg/24h)
- Reduce to 0.25-0.5 mg in elderly/debilitated (max 2 mg/24h)
Unable to swallow 4:
- Midazolam 2.5-5 mg SC every 2-4 hours PRN
- If needed >2x daily: SC infusion 10 mg over 24 hours
- Reduce to 5 mg/24h if eGFR <30 mL/min
Special Population Considerations
Older Adults (≥65 years)
Critical finding: A 2025 systematic review found midazolam carries excessive risk in older adults, with 53% experiencing adverse events compared to 16.8% overall 2.
Safest option for older adults:
- Quetiapine showed significantly lower adverse events (OR 0.27) compared to haloperidol 2
- Avoid midazolam - 5.25 times higher risk of adverse events vs haloperidol 2
Dose reductions required:
- Haloperidol: max 5 mg daily (vs 10 mg in younger adults)
- Lorazepam: 0.25-0.5 mg (vs 0.5-1 mg)
- Levomepromazine: 6.25-12.5 mg (vs 12.5-25 mg) 4
Renal Impairment (eGFR <30 mL/min)
- Use oxycodone instead of morphine if opioids needed for breathlessness-related agitation 4
- Reduce midazolam infusion to 5 mg/24h 4
Palliative Care/End-of-Life
Stratify by life expectancy 5:
Weeks to days (dying patient):
- Focus on symptom control and family support
- Upward titration of haloperidol, risperidone, olanzapine, or quetiapine
- Add lorazepam for refractory agitation despite high-dose neuroleptics
- Consider rectal/IV haloperidol or chlorpromazine ± lorazepam
Months to weeks:
- Haloperidol 0.5-1 mg BID
- Alternatives: risperidone 0.5-1 mg BID, olanzapine 2.5-15 mg daily, quetiapine 50-100 mg PO/SL BID
Severe delirium (any timeframe):
- Haloperidol 0.5-2 mg every 1 hour PRN until controlled
- Add lorazepam 0.5-2 mg every 4-6 hours if refractory to high-dose neuroleptics
Common Pitfalls
Mistaking pain for agitation: May lead to increased opioids that worsen delirium 5. Assess pain separately.
Continuing antipsychotics after ICU/hospital discharge: Patients often remain on these unnecessarily, causing significant morbidity and cost 6.
Using specific blood alcohol levels to delay psychiatric evaluation: Base assessment on cognitive abilities, not BAC 1.
Overlooking iatrogenic causes: Rotate opioids if opioid-induced delirium suspected 5.
QTc prolongation concerns: While all antipsychotics prolong QTc at maximum doses, none typically exceed 500 ms. Thioridazine has greatest effect, olanzapine the least 1.
Monitoring and Reassessment
- Continuously evaluate whether interventions achieve adequate symptom control
- Assess reduction of patient/family distress
- Monitor for acceptable sense of control and relief of caregiver burden 5
- If unsatisfactory response: intensify interventions and consider palliative care or psychiatry consultation 5