Changes in weight and metabolic parameters following long-term iloperidone use: A meta-analysis of data from 9 Phase II and III trials of iloperidone


Objective: To determine the impact of iloperidone treatment on metabolic parameters. Methods: Data were analyzed from 3210 patients who received iloperidone and 587 patients who received placebo for up to 2 years during 9 Phase II and Phase III studies (integrated safety database). Patients were pooled by most frequent iloperidone dose into 3 groups: 4 - 8 mg/d, 10 - 16 mg/d, and 20 - 24 mg/d. Laboratory data from 8 studies were random (fasting and nonfasting) while patients from 1 study (n = 447) were all sampled at fasting. Results: Mean (standard deviation [SD]) weight gain from baseline to endpoint was 2.1 (6.8) kg for all patients on iloperidone. Fasting mean (SD) total cholesterol changes from baseline to end of study were 8.2 (31.6) for iloperidone and -2.2 (35.2) mg/dL for placebo. Fasting mean (SD) triglyceride changes during this period were iloperidone: -0.83 (82.3); placebo: 16.5 (113.1) mg/dL. Fasting mean (SD) glucose changes were iloperidone: 6.6 (24.0); placebo: -0.05 (17.0) mg/dL from baseline to end of study. Glycosylated hemoglobin levels were unchanged following iloperidone treatment. Conclusion: These data suggest a metabolic profile for iloperidone of modest weight gain accompanied by small changes in lipids and glucose that are unlikely to be of clinical concern.

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Hochfeld, M. , Ahmed, S. , Meng, X. and Winseck, A. (2012) Changes in weight and metabolic parameters following long-term iloperidone use: A meta-analysis of data from 9 Phase II and III trials of iloperidone. Open Journal of Psychiatry, 2, 414-422. doi: 10.4236/ojpsych.2012.224058.

Conflicts of Interest

The authors declare no conflicts of interest.


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