Can Buspirone Be Used in an 85-Year-Old with Restlessness?
Yes, buspirone can be used in an 85-year-old patient with restlessness, particularly when the restlessness is related to anxiety or behavioral disturbances in dementia, and it has demonstrated a favorable safety profile in elderly patients.
Evidence from FDA Labeling and Geriatric Studies
The FDA label explicitly addresses geriatric use and provides reassuring data. In a study of 6,632 patients treated with buspirone for anxiety, 605 patients were ≥65 years old and 41 were ≥75 years old, with safety and efficacy profiles similar to younger populations (mean age 70.8 vs 43.3 years). Importantly, there were no age-related effects on buspirone pharmacokinetics 1.
A large open-label trial of over 6,000 patients confirmed that elderly patients (≥65 years) achieved similar anxiety relief as younger patients within 4 weeks, with 80% reporting no side effects. The side effect profile in elderly patients differed little from younger patients, and no special dose adjustment was needed 2.
Clinical Efficacy in Elderly Restlessness
For behavioral disturbances in dementia—a common cause of restlessness in 85-year-olds—buspirone shows particular promise. A retrospective study of 179 patients (mean age 83.8 years) with dementia-related behavioral disturbances found that 68.6% responded to buspirone, with 41.8% showing moderate to marked improvement. The mean effective dose was 25.7 mg daily, and it was well-tolerated 3.
For anxiety-related restlessness, a controlled trial in elderly patients (>65 years) demonstrated that buspirone at a mean dose of 18 mg/day produced significantly greater improvement than placebo on anxiety scales, and was well-tolerated even in patients receiving multiple medications for chronic conditions 4.
Safety Considerations Specific to This Population
Advantages Over Alternatives
Buspirone has several safety advantages in elderly patients:
- Does not cause significant sedation or functional impairment 1
- No cross-tolerance with benzodiazepines, which are problematic in the elderly 1
- Unlike benzodiazepines, buspirone is not listed in the 2019 AGS Beers Criteria as potentially inappropriate for older adults 5
- Recent geriatric emergency guidelines (2025) specifically warn against benzodiazepines like midazolam in older adults due to excessive adverse event risk 6
Important Caveats
Hepatic/Renal Impairment: Assess liver and kidney function first. Buspirone is contraindicated in severe hepatic or renal impairment due to increased plasma levels and prolonged half-life 1
Paradoxical Restlessness: A small fraction of patients may develop a syndrome of restlessness shortly after starting buspirone, possibly related to increased noradrenergic activity or akathisia-like effects 1. Monitor closely in the first few weeks.
Drug Interactions: Review all medications, particularly:
Onset of Action: Unlike benzodiazepines, buspirone requires 2-4 weeks for full anxiolytic effect 7, 4. This is not appropriate for acute severe agitation requiring immediate control.
Practical Dosing Algorithm
Start low and go slow:
- Begin with 5 mg twice daily (10 mg/day total)
- Increase by 5 mg every 3-7 days as tolerated
- Target dose: 15-30 mg/day in divided doses
- Maximum studied dose in elderly: 30 mg/day 7, 2
- Take consistently with or without food 1
Monitor for:
- Improvement in restlessness/anxiety (2-4 weeks)
- Early paradoxical restlessness (first 1-2 weeks)
- Dizziness, headache (most common side effects)
When NOT to Use Buspirone
- Severe hepatic or renal impairment (absolute contraindication) 1
- Acute severe agitation requiring immediate intervention (buspirone takes weeks to work)
- Current MAOI use or within 14 days of discontinuation 1
- If restlessness is due to delirium (address underlying cause first)
Bottom line: Buspirone is a reasonable and evidence-supported choice for an 85-year-old with restlessness related to anxiety or dementia-related behavioral disturbances, provided hepatic and renal function are adequate and the clinical situation allows for gradual titration over weeks.