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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
Tristan Manalac, 6 days ago
Atopic dermatitis appears to impair sleep quality, but not sleep duration, in children, particularly in those with more severe diseases, according to a new study.
13 Mar 2019
Individuals following a diet low in or free of meat are at lower risk of diabetes, and this protective association is partly attributable to having a lower body mass index when compared with regular meat eaters, according to a study.
4 days ago
Drinking coffee confers benefits for recurrence of hepatocellular carcinoma (HCC) and survival following orthotopic liver transplantation, a study has found.
13 Mar 2019
Vitamin E supplementation does not appear to contribute to blood pressure (BP) improvement, with results of a recent systematic review and meta-analysis showing decreases only in systolic (S)BP but no favourable effect on diastolic (D)BP and mean arterial pressure (MAP).