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A 6-year open-label study of the efficacy and safety of olanzapine long-acting injection in patients with schizophrenia: a post hoc analysis based on the European label recommendation

Authors Anand E, Berggren L, Deix C, Tóth A, McDonnell D

Received 16 December 2014

Accepted for publication 23 March 2015

Published 27 May 2015 Volume 2015:11 Pages 1349—1357

DOI https://doi.org/10.2147/NDT.S79347

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Roger Pinder

Ernie Anand,1 Lovisa Berggren,2 Claudia Deix,3 Ágoston Tóth,4 David P McDonnell5

1Neuroscience Medical Affairs – EU, Eli Lilly, Windlesham, United Kingdom; 2Global Statistical Sciences, Lilly Deutschland GmbH, Bad Homburg, Germany; 3Neuroscience, Eli Lilly Regional Operations GmbH, Vienna, Austria; 4Lilly Hungary, Budapest, Hungary; 5Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA

Purpose: To assess the long-term efficacy and safety of olanzapine long-acting injection (LAI) in the treatment of schizophrenia, focusing on clinical trial data consistent with the approved indication and dosing recommendations in the European label and which forms the basis for treatment decisions made by clinicians in daily clinical practice.
Patients and methods: This was a post hoc analysis of a 6-year open-label study of olanzapine LAI in patients (male or female, 18–75 years old) with schizophrenia entering this study following feeder studies of olanzapine LAI. Patients were flexibly dosed (45–405 mg, 2- to 4-week intervals), but those receiving oral olanzapine supplementation whose total olanzapine dose was >20 mg/day equivalent were excluded from this post hoc analysis.
Results: Data from 669 patients were analyzed (44.5% completed). Positive and Negative Syndrome Scale total scores did not change significantly from baseline to endpoint; Clinical Global Impression-Severity scores improved significantly. Mean weight change was +2.19 kg (P<0.001), with 40.8% of patients experiencing ≥7% weight gain. There were 24 occurrences of post-injection delirium/sedation syndrome (PDSS).
Conclusion: Olanzapine LAI appeared to be effective in the long-term maintenance of schizophrenia, and the safety profile was consistent with that of oral olanzapine, except for injection-related events and PDSS events.

Keywords: antipsychotic, depot, long-acting injection, olanzapine, pamoate, schizophrenia

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