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    The efficacy of sodium benzoate as an adjunctive treatment in early psychosis - CADENCE-BZ: study protocol for a randomized controlled trial

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    Author
    Ryan, A; Baker, A; Dark, F; Foley, S; Gordon, A; Hatherill, S; Stathis, S; Saha, S; Bruxner, G; Beckman, M; ...
    Date
    2017-04-07
    Source Title
    Trials
    Publisher
    BIOMED CENTRAL LTD
    University of Melbourne Author/s
    Berk, Michael; Dean, Olivia
    Affiliation
    Psychiatry
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    Ryan, A., Baker, A., Dark, F., Foley, S., Gordon, A., Hatherill, S., Stathis, S., Saha, S., Bruxner, G., Beckman, M., Richardson, D., Berk, M., Dean, O., McGrath, J. & Scott, J. (2017). The efficacy of sodium benzoate as an adjunctive treatment in early psychosis - CADENCE-BZ: study protocol for a randomized controlled trial. TRIALS, 18 (1), https://doi.org/10.1186/s13063-017-1908-5.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/259016
    DOI
    10.1186/s13063-017-1908-5
    Abstract
    BACKGROUND: Psychotic disorders affect up to 3% of the population and are often chronic and disabling. Innovation in the pharmacological treatment of psychosis has remained stagnant in recent decades. In order to improve outcomes for those with psychotic disorders, we present a protocol for the trial of a common food preservative, sodium benzoate, as an adjunctive treatment in early psychosis. METHODS: Persons experiencing early psychosis (n = 160) will be recruited through hospitals and community mental health services in Queensland, Australia. Patients will be randomized to receive either 12-week treatment with 1000 mg (500 mg twice daily (BD)) sodium benzoate or placebo. Patients will undergo fortnightly outcome assessments, in addition to weekly ongoing capacity to consent, drug compliance and safety assessments. The primary outcome measure is the Positive and Negative Syndrome Scale (PANSS) total score. Secondary outcomes are Global Assessment of Function (GAF), Assessment of Quality of Life Scale (AQOL), the Activity and Participation Questionnaire (APQ6), International Physical Activity Questionnaires (IPAQ), Simple Physical Activity Questionnaire (SIMPAQ), Physical Activity Questionnaire, Clinical Global Impression (CGI), Hamilton Depression rating Scale-17 items (HDRS), Opiate Treatment Index (OTI) and the Patients' Global Impression of Improvement (PGI-I). As a tertiary objective, changes from baseline to endpoint in to serum markers related to D-alanine, L-alanine, D-serine, L-serine, glycine and glutamate will be investigated. DISCUSSION: Consumers and clinicians are keen to help develop better treatments for those with psychosis. This study, part of the wider Cadence clinical trials platform will examine if a safe and accessible food preservative can help optimize outcomes in those with psychosis. TRIAL REGISTRATION: Australian New Zealand Clinical Trials registry (ANZCTR), ACTRN12615000187549 . Registered on 26 February 2015.

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