A placebo-controlled study of extract of ginkgo biloba added to clozapine in patients with treatment-resistant schizophrenia. – Cost Effective Supplements

A placebo-controlled study of extract of ginkgo biloba added to clozapine in patients with treatment-resistant schizophrenia.

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Link to full study

http://www.ncbi.nlm.nih.gov/pubmed/18545061

Conclusion of this study

EGb produced a mean 7.9+/-7.0 point reduction in the total Scale for the Assessment of Negative Symptoms score compared with a mean 1.8+/-3.5 point reduction in the placebo group (P=0.034). These preliminary data suggested that EGb was found useful for enhancing the effect of clozapine on negative symptoms in patients with treatment-resistant schizophrenia.