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Sodium benzoate augments clozapine for schizophrenia

10 Feb 2018
The second generation injection may cost up to HK$5000 per month.

Sodium benzoate appears to augment the effects of clozapine, according to a recent study, which shows that the combination therapy results in significant improvements in symptomatology in clozapine-resistant schizophrenia patients.

The randomized, double-blind, placebo-controlled trial included 60 schizophrenia patients stabilized with clozapine who were randomized to receive one of three add-on treatments: 1 g/day of sodium benzoate (n=20), 2 g/day of sodium benzoate (n=20) or placebo (n=20). Add-on treatment was administered for an additional 60 days.

Both doses of sodium benzoate yielded significantly greater changes from baseline in the Scales for the Assessment of Negative Symptoms (SANS-20) scores relative to placebo at 6 weeks (p=0.029 for 1 g; p=0.031 for 2 g).

In comparison, only the 2-g sodium benzoate treatment resulted in significant 6-week improvements in the Positive and Negative Syndrome Scale (PANSS) scores compared with placebo (p=0.006).

Scores in the quality of life scale were also significantly better in the 2-g sodium benzoate vs placebo group at 6 weeks (p=0.009). No such effect was observed with 1 g of the add-on treatment.

In terms of secondary outcomes, neither 1 g or 2 g of add-on sodium benzoate resulted in significant 6-week improvements in depression, as per the Hamilton rating scale for depression (p=0.729 and p=0.114, respectively), and endpoint improvements in cognitive function (p=0.185 and p=0.930, respectively).

Minimal extrapyramidal syndrome was reported in all three groups both at baseline and at the conclusion of the study.

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Most Read Articles
18 Jun 2019
The aromatase inhibitor anastrozole shows promise in the treatment of children with congenital adrenal hyperplasia, reducing bone age advancement without adversely affecting bone mineral density and visceral adipose tissue, as shown in a recent study.
20 hours ago
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Elvira Manzano, Yesterday
Long-term treatment with the interleukin-5 receptor alpha-directed cytolytic monoclonal antibody benralizumab led to long-term control of asthma, improvement in pulmonary function, and was safe in patients with severe eosinophilic asthma in the 2-year integrated analysis of the SIROCCO, CALIMA, and ZONDA pivotal studies plus the BORA extension study reported at ATS 2019.
Pearl Toh, Yesterday
Emerging evidence is showing that the two major new classes of antidiabetic drugs — SGLT2* inhibitors and GLP-1** receptor agonists (RAs) — not only confer cardiovascular (CV) benefits to patients with type 2 diabetes (T2D), they also delay the loss of kidney function among these patients, potentially providing nephrologists with an additional tool in their armamentarium for managing patients with chronic kidney disease (CKD) in the future.