Dr Randall White was presenting a research poster at the American Psychiatric Association 2017 Annual Meeting in San Diego, CA.
Session: New Research Posters 1
Date: Monday, May 22
Time: 10:00 AM–12:00 PM
Poster Number: P5-020
Poster Hall: Exhibit Hall A, Ground Level, San Diego Convention Center
Although clozapine is the standard for treatment-resistant psychosis, 40-60% of those treated with clozapine do not have an adequate response as measured by a 20% or greater reduction in the BPRS, PANSS or other assessments. This condition is known as clozapine resistance, ultra-resistance or refractory psychosis. At the publicly funded BC Psychosis Program, at UBC Hospital in Vancouver, Canada, we have developed criteria to identify clozapine resistance (CR) and an algorithmic approach to treatment based on available evidence. This involves assuring adequate clozapine treatment verified by dose and serum level, including addition of fluvoxamine when appropriate; offering ECT to CR patients, and/or antipsychotic augmentation preferably with sulpiride or aripiprazole. All patients admitted since program inception in February 2012 had failed at least 2 antipsychotic trials. A psychiatrist, social worker, pharmacist, nurse, general physician, and neuropsychologist evaluated each patient. All available summaries of previous psychiatric admissions were reviewed, and medical, pharmacological, social and behavioural histories were recorded.
All information is presented at a case conference and a DSM-IV or -5 multiaxial diagnosis reflects agreement among at least 2 psychiatrists and a psychologist. Symptom ratings included the Positive and Negative Syndrome Scale (PANSS), the Global Assessment of Psychopathology (GAPS), and the Clinical Global Impression-Severity and Improvement scales (CGI). Clozapine resistance is defined by an adequate trial, that is, at least 500 mg daily dose for ≥60 days; and continued symptoms manifested by PANSS with 2 positive scale items rated ≥ 4 (moderate) OR 1 item ≥ 6 (severe).
Of 114 patients with schizoaffective disorder or schizophrenia on clozapine at admission, 89 had received it for≥ 60 days; 23 were on at least 500 mg; and 20 met criteria for clozapine resistance (i.e., 17 men and 3 women). Of these, 17 had schizophrenia and 3 schizoaffective disorder; the mean age was 39.6 years. The mean PANSS scores at admission were Positive=28.3, Negative=26.2, General=50.0, Total=104.4; the mean CGI-S was 6.3. Of 16 patients with complete data, 8 were offered ECT and 3 accepted a course; the number of ECT treatments ranged 19-46. Of 19 patients discharged to date, 17 remained on clozapine with a mean dose of 463.2 mg; to obtain a therapeutic clozapine level, 6 received fluvoxamine, dose range 37.5-200 mg. Seven patients received adjunctive antipsychotics: 3 sulpiride, 2 aripiprazole, 4 first-generation agents. At discharge, the mean PANSS were Positive=20.8, Negative=22.1, General=40.0, Total=82.9; the mean CGI-S was 5.1.
Find full info on the American Psychiatric Association 2017 Annual Meeting here!