Abstract
Objective
The objective of the study was to compare metabolic effects of ziprasidone versus olanzapine treatment in patients with first-episode schizophrenia.
Methods
In this 6-week, multicenter, open-label trial, 260 patients were randomly assigned to receive ziprasidone or olanzapine treatment (130 per group). Primary metabolic measures were changes in weight and body mass index (BMI). Secondary metabolic measures were changes in glucose, insulin, lipids, and blood pressure. Efficacy and safety were also measured additionally.
Results
A total number of 230 patients completed the study. The mean daily dosages were 138.2(28.6) mg for ziprasidone and 19.0(2.3) mg for olanzapine. After 6-week treatment, there were significant between-group differences in change scores on weight [4.22(3.49) kg versus −0.84(2.04) kg, p < 0.001] and BMI [1.59(1.37) versus −0.30(0.74), p < 0.001]. In addition, there were significant between-group differences in change scores on fasting plasma glucose, insulin, homeostasis model assessment 2-insulin resistance, low-density lipoprotein, total cholesterol, and triglycerides (p < 0.001); all the changes were clinically in favor of ziprasidone treatment. Both medications were effective in improving schizophrenia symptoms, but the decreases in Positive and Negative Syndrome Scale total scores of the olanzapine group were significantly greater than that of the ziprasidone group (p < 0.05). Compared with olanzapine, ziprasidone also induced more prolonging of corrected QT interval and extrapyramidal side effects (p < 0.05). Both medications were well tolerated, and no serious adverse events were observed in either group.
Conclusions
Compared with olanzapine, ziprasidone treatment was associated with less adverse effects on glucose and lipid metabolism in patients with first-episode schizophrenia.
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Acknowledgments
This study was supported by the Pfizer Inc., the National Natural Science Foundation of China (Grant No. 30971052 to RRW), and National R&D Special Program for Health Professions (Grant No. 201002003 to JPZ). Dr. Wu expresses her gratitude to the World Psychiatric Association for providing financial support for her fellowship.
Conflict of interest
All authors declared no conflict of interest. The only role of Pfizer Inc. was in the monitoring. The company had no further role in the study design, collection, analysis, and interpretation of data and writing the reports. The company also had no role in the decision to submit the paper for publication.
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Ou, JJ., Xu, Y., Chen, HH. et al. Comparison of metabolic effects of ziprasidone versus olanzapine treatment in patients with first-episode schizophrenia. Psychopharmacology 225, 627–635 (2013). https://doi.org/10.1007/s00213-012-2850-6
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DOI: https://doi.org/10.1007/s00213-012-2850-6