Psychosis in the Elderly

Psychosis in Elderly: Introduction - Old Minds, New Realities

• Psychosis: Loss of contact with reality (delusions, hallucinations, disorganized thought/speech/behavior).
• Elderly context: Affects individuals aged >65 years.
• Significance: Common, multifactorial. Links to ↑ morbidity, caregiver burden, institutionalization.
• Key Onset Distinctions:
  • Early-Onset Schizophrenia (EOS) persisting into old age.
  • Late-Onset Psychosis (LOP): 1st episode >40 yrs.
  • Very-Late-Onset Schizophrenia-Like Psychosis (VLOSLP): 1st episode >60 yrs.
• Challenges: Diagnostic complexity due to medical/neurological mimics (e.g., dementia, delirium), polypharmacy, sensory impairment.

⭐ Psychosis in older adults frequently has an identifiable organic cause, unlike early-onset forms.

Psychosis in Elderly: Etiology & Differentials - Roots of Confusion

• Key: Multifactorial; comprehensive assessment vital. Distinguish from delirium (common, reversible).
• Medical Causes:
  • Neurocognitive: Alzheimer"s (AD), Lewy Body Dementia (LBD), Parkinson"s (PD)
  • Delirium: Often UTI, pneumonia, metabolic imbalance (electrolytes, glucose), polypharmacy
  • Other CNS: Stroke, tumor, epilepsy, infections (encephalitis)
  • Systemic: Vitamin B12/folate deficiency, thyroid dysfunction, organ failure
• Substance/Medication-Induced:
  • Meds: Anticholinergics, Steroids, L-Dopa, Opioids, Benzodiazepines (📌 "A SLOB")
  • Withdrawal: Alcohol, sedatives
• Primary Psychiatric:
  • Late-Onset Schizophrenia (LOS): >40 yrs
  • Very-Late-Onset Schizophrenia-Like Psychosis (VLOSLP): >60 yrs
  • Delusional Disorder
  • Mood Disorders with Psychotic Features (Severe Depression, Mania)

⭐ Visual hallucinations are prominent in Lewy Body Dementia, whereas auditory hallucinations are more characteristic of Late-Onset Schizophrenia/VLOSLP.

Psychosis in Elderly: Clinical Features & Diagnosis - Spotting the Signs

• Core Features:
  • Hallucinations: Visual (VH) often prominent, also Auditory (AH).
  • Delusions: Persecutory, paranoid common.
  • Disorganized thought, speech, or behavior.
  • Mood changes (depression/anxiety), cognitive deficits often co-exist.
  • Consider Late-Onset Schizophrenia (LOS: >40 yrs), Very-Late-Onset Schizophrenia-Like Psychosis (VLOSLP: >60 yrs).
• Key Differentials:
  • Delirium: Acute onset, fluctuating consciousness, inattention.
  • Dementia (e.g., DLB, AD with psychosis): Progressive cognitive decline.
  • Mood disorders with psychotic features.
• Diagnostic Approach:

⭐ Visual hallucinations in an elderly patient with parkinsonism and fluctuating cognition strongly suggest Dementia with Lewy Bodies (DLB).

Psychosis in Elderly: Management Principles - Gentle & Judicious

• Guiding Principle: "Start Low, Go Slow" (📌 SLOGS). Prioritize safety.
• Non-Pharmacological (Initial Approach):
  • Environmental: calm, well-lit, familiar surroundings.
  • Behavioral: validation, redirection, de-escalation techniques.
  • Caregiver: education, support, stress management.
• Pharmacological (If Needed & Non-Pharm Fails):
  • SGAs preferred: Risperidone (0.25-0.5 mg/day), Olanzapine (2.5 mg/day), Quetiapine (12.5-25 mg/day).
  • Aim: Lowest effective dose, shortest possible duration.
  • ⚠️ BBW: All antipsychotics show ↑ mortality in elderly with dementia-related psychosis.
  • Monitor: EPS, metabolic syndrome (weight, glucose, lipids), QTc, orthostatic hypotension, sedation, falls.
  • Avoid: Routine/long-term benzodiazepines (↑ risk of falls, confusion, paradoxical agitation).

⭐ Second-generation antipsychotics (SGAs) are generally preferred over first-generation antipsychotics (FGAs) due to a more favorable side-effect profile in the elderly, particularly lower extrapyramidal symptoms (EPS) risk. However, the crucial black box warning for increased mortality in dementia-related psychosis applies to all antipsychotics.

High‑Yield Points - ⚡ Biggest Takeaways

• Late-onset schizophrenia (>40 yrs) & Very-late-onset schizophrenia-like psychosis (VLOSLP) (>60 yrs) are distinct.
• Always rule out secondary causes: delirium, dementia, medical conditions, or substance-induced psychosis.
• VLOSLP often features prominent persecutory delusions and visual/tactile hallucinations; fewer negative symptoms.
• Sensory deficits (e.g., hearing or vision loss) are significant predisposing factors.
• Atypical antipsychotics are first-line; use the lowest effective dose ("start low, go slow").
• High risk of antipsychotic side effects (EPS, metabolic, CV); note ↑mortality in dementia patients.
• Prioritize non-pharmacological strategies (environmental modification, caregiver support) before or with medication.