Drugs & Aging

, Volume 30, Issue 1, pp 19–22 | Cite as

Management of Neuropsychiatric Symptoms in Long-Term Care Residents with Parkinson’s Disease

A Retrospective Cohort Study
  • Nathan Herrmann
  • Connie Marras
  • Hadas D. Fischer
  • Xuesong Wang
  • Geoff M. Anderson
  • Paula A. Rochon
Short Communication



The management of neuropsychiatric symptoms, including psychosis, in Parkinson’s Disease (PD) is complicated by the fact that treatment with antipsychotics can worsen the movement disorder, which may necessitate changes to antiparkinsonian medications.


The objectives of this study were to determine what antipsychotics are prescribed to residents in long-term care with PD and document subsequent changes in levodopa dosage.


A retrospective cohort study using administrative health database information from Ontario, Canada, was conducted. PD diagnostic codes were obtained from the Ontario Health Insurance Plan (physician diagnostic codes) and the Canadian Institute of Health Information (hospitalization discharge diagnoses). The Ontario Drug Benefit database provided information on the use of antiparkinsonian medications and antipsychotics. Residents diagnosed with PD in long-term care were included if they were treated with stable doses of levodopa monotherapy and received a new prescription for an antipsychotic. The type of antipsychotic and the changes in levodopa dosage were determined.


There were 479 residents who met inclusion criteria. The prescribed antipsychotics were quetiapine (n = 192; 40 %), risperidone (n = 185; 39 %) and olanzapine (n = 81; 17 %), and only 21 (4 %) received a prescription for a typical antipsychotic. The first levodopa dosage change was a dose reduction in 469 (98 %) patients, and a dose increase in ten (2 %) patients.


Many PD patients in long-term care are treated with potentially inappropriate antipsychotic medications. However, there is no evidence that this treatment results in a prescribing cascade that leads to inappropriate increases in levodopa dosage.


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Copyright information

© Springer International Publishing Switzerland 2012

Authors and Affiliations

  • Nathan Herrmann
    • 1
  • Connie Marras
    • 2
  • Hadas D. Fischer
    • 3
  • Xuesong Wang
    • 3
  • Geoff M. Anderson
    • 3
    • 4
    • 5
  • Paula A. Rochon
    • 3
    • 4
    • 5
    • 6
  1. 1.Department of Psychiatry, Sunnybrook Health Sciences CentreUniversity of TorontoTorontoCanada
  2. 2.Toronto Western Hospital Movement Disorders CentreUniversity of Toronto and the Edmond J. Safra Program in Parkinson’s ResearchTorontoCanada
  3. 3.Institute for Clinical Evaluative SciencesTorontoCanada
  4. 4.Institute of Health Policy, Management and EvaluationUniversity of TorontoTorontoCanada
  5. 5.Women’s College Research InstituteWomen’s College HospitalTorontoCanada
  6. 6.Department of MedicineUniversity of TorontoTorontoCanada

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