CASE Agitated and aggressive
Mr. X, age 61, who has Alzheimer’s disease, is brought to the emergency department (ED) by his family after he is found to be confused, becomes physically aggressive with family members, and threatens to burn the house down. His family reports that earlier that day, he was paranoid that somebody was trying to kill him and he tried to leave the house. Mr. X has been experiencing visual hallucinations and delusional thoughts that made him aggressive towards his son. After an initial laboratory workup in the ED, Mr. X’s bloodwork comes back positive for mild leukocytosis, indicating the possibility of an infectious etiology. Mr. X is admitted to the hospital for further evaluation of his altered mental status.
HISTORY Decline over 2 years
This is Mr. X’s third inpatient admission for agitation and psychosis. His current medications—twice daily divalproex sodium extended release (ER), 250 mg every morning and 500 mg at every bedtime, and prazosin, 2 mg/d at bedtime—have been only partially effective. His medical history includes osteoarthritis, back pain, and heterozygous factor V Leiden (not on anticoagulation). He quit smoking tobacco several years ago and has no history of substance use. He has no family history of dementia. Previous trials of cholinesterase inhibitors, antipsychotics, and antidepressants resulted in only minimal improvement in his agitation and psychosis.
A chart review shows that 2 years before his current hospital admission, Mr. X had presented to his primary care physician with slurred speech, forgetfulness, missing words, and transient reading difficulties. His initial laboratory workup and MRI came back normal. He was placed on short-term disability due to work-related errors. He was referred to the hospital’s Memory Clinic 2 years ago, where his Mini-Mental State Exam score was 20/30, indicating mild cognitive impairment. Stroke workup was negative. Due to significant language deficits, a differential diagnosis for Alzheimer’s disease vs primary progressive aphasia vs frontotemporal dementia was made. He screened positive for amyloid PET scan, which confirmed the diagnosis of Alzheimer’s disease.
Neuropsychological testing showed similarities with logopenic variant of primary progressive aphasia, which in many cases is present in Alzheimer’s disease. Mr. X was prescribed anticholinesterase inhibitors, including donepezil, 10 mg/d, and rivastigmine patch, 9.5 mg/d; and memantine, 10 mg/d, which he could not tolerate because of adverse effects. During the next year, Mr. X deteriorated and presented to the ED a few times with significant psychotic symptoms and aggression. He had a poor response to various pharmacologic and nonpharmacologic interventions during this time.
EVALUATION Continued problematic behaviors
During his hospitalization, Mr. X continues to be agitated and paranoid and is placed in restraints. He is unable to respond to his name and cannot follow simple verbal commands. Results of his laboratory workup are within normal limits. His mild leukocytosis resolves with no active signs of infection. Psychiatry is consulted for management of his behavioral and psychological symptoms of dementia (BPSD).
Continue to: Mr. X is started on olanzapine...