Management of Anxiety and Agitation in Elderly Patients

First-Line Treatment Options

For elderly patients with anxiety, lorazepam 0.25-0.5mg orally four times a day as required is recommended, with a maximum dose of 2mg in 24 hours 1, 2, 3
For delirium-related agitation, haloperidol 0.5mg orally at night and every 2 hours when required is recommended, with a maximum daily dose of 5mg in elderly patients 1, 2, 3
Midazolam 2.5mg subcutaneously every 2-4 hours as required can be used for anxiety in patients unable to swallow, with dose reduction to 5mg over 24 hours if estimated glomerular filtration rate (eGFR) is <30 mL/minute 1, 2, 3

Quetiapine 25mg orally as needed can be used as a second-line option, with caution due to potential for orthostatic hypotension and dizziness 4
Risperidone 0.5mg orally as needed can be used as a second-line option, with dose reduction in patients with severe renal or hepatic impairment 4

Before starting medication, address reversible causes of anxiety, delirium, and agitation, including exploring patient concerns, ensuring effective communication and orientation, and treating physical causes such as hypoxia or constipation 1, 2, 3
Use lower doses of benzodiazepines in frail elderly patients or those with COPD, and monitor for paradoxical agitation and worsening delirium 1, 2, 3, 4
Antipsychotics should be used for the shortest period possible, and monitoring for orthostatic hypotension, extrapyramidal side effects, and response to PRN medications is essential 4

For anxiety without delirium, start with lorazepam 0.25-0.5mg orally PRN 1, 2, 3
For delirium with agitation, start with haloperidol 0.5mg orally PRN 1, 2, 3
If first-line treatment is ineffective or contraindicated, consider second-line options like quetiapine or olanzapine, and monitor closely for oversedation when combining benzodiazepines and antipsychotics 1, 2, 3, 4

For elderly patients with agitation who are unable to take oral medications, the recommended dosing is olanzapine 2.5-5 mg IM with lorazepam 1 mg IM, administered separately to avoid potential adverse interactions 5
Start with 2.5 mg IM for elderly patients with dementia-related agitation, as recommended by the American College of Emergency Physicians 6, 7

The combination of olanzapine and lorazepam has demonstrated greater efficacy than either medication alone in controlling acute agitation, with a strength of evidence supported by the American College of Emergency Physicians 6, 7
Olanzapine 5 mg IM has shown faster onset of action compared to lorazepam alone in elderly patients with dementia-related agitation, according to the American College of Emergency Physicians 7, 5

Assess response to medication after 30 minutes and again at 60 minutes, as recommended by the American College of Emergency Physicians 5
Document effectiveness using standardized scales such as PANSS-EC or CMAI when possible, with a strength of evidence supported by the American College of Emergency Physicians 7

Lorazepam is the preferred benzodiazepine for PRN use in elderly patients due to its short half-life, lack of active metabolites, and predictable pharmacokinetics, as recommended by the American Academy of Family Physicians 8, 9

Approximately 10% of elderly patients experience paradoxical agitation with benzodiazepines, and regular use can lead to tolerance, addiction, depression, and cognitive impairment, according to the American Academy of Family Physicians 8, 9
Benzodiazepines significantly increase fall risk in the elderly, and lower doses should be used when combining with antipsychotics to avoid oversedation, as noted in the Annals of Oncology 10

For patients with COPD or frailty, the lower end of the dosing range (0.25 mg) of lorazepam should be used, and midazolam 2.5 mg subcutaneously every 2-4 hours PRN can be considered as an alternative, with reduced doses in patients with eGFR <30 mL/minute, as suggested by the Annals of Oncology 10
The American Academy of Family Physicians recommends caution with the use of long half-life benzodiazepines due to accumulation and prolonged sedation 8
The Annals of Oncology advises against combining benzodiazepines with high-dose olanzapine due to reported fatalities, and against using benzodiazepines as monotherapy for delirium-related agitation, as they may worsen confusion 10

The American Geriatrics Society recommends evaluating the patient daily with in-person examination to determine ongoing need for PRN anxiolytic medication 11