Efficacy and safety of asenapine in a placebo- and haloperidol-controlled trial in patients with acute exacerbation of schizophrenia
Abstract
Asenapine is approved by the Food and Drugs Administration in adults for acute treatment of schizophrenia or of manic or mixed episodes associated with bipolar I disorder with or without psychotic features. In a double-blind 6-week trial, 458 patients with acute schizophrenia were randomly assigned to fixed-dose treatment with asenapine at 5 mg twice daily (BID), asenapine at 10 mg BID, placebo, or haloperidol at 4 mg BID (to verify assay sensitivity). With last observations carried forward (LOCF), mean Positive and Negative Syndrome Scale total score reductions from baseline to endpoint were significantly greater with asenapine at 5 mg BID (-16.2) and haloperidol (-15.4) than placebo (-10.7; both P < 0.05); using mixed model for repeated measures (MMRM), changes at day 42 were significantly greater with asenapine at 5 and 10 mg BID (-21.3 and -19.4, respectively) and haloperidol (-20.0) than placebo (-14.6; all P < 0.05). On the Positive and Negative Syndrome Scale positive subscale, all treatments were superior to placebo with LOCF and MMRM; asenapine at 5 mg BID was superior to placebo on the negative subscale with MMRM and on the general psychopathology subscale with LOCF and MMRM. Treatment-related adverse events (AEs) occurred in 44% and 52%, 57%, and 41% of the asenapine at 5 and 10 mg BID, haloperidol, and placebo groups, respectively. Extrapyramidal symptoms reported as AEs occurred in 15% and 18%, 34%, and 10% of the asenapine at 5 and 10 mg BID, haloperidol, and placebo groups, respectively. Across all groups, no more than 5% of patients had clinically significant weight change. Post hoc analyses indicated that efficacy was similar with asenapine and haloperidol; greater contrasts were seen in AEs, especially extrapyramidal symptoms.
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Only 2 of 6 completed monotherapy trials are currently published but without results of neurocognitive testing.
“Only 2 of 6 completed monotherapy trials are currently published49,50 but without results of neurocognitive testing.”
From Clinical trials of potential cognitive-enhancing drugs in schizophrenia: what have we learned so far? (2013) · cites this paper as [49]
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- Authors
- Kane, J. M., Cohen, M., Zhao, J., Alphs, L., & Panagides, J.
- Affiliations
- Zucker Hillside Hospital (US)
- Merck & Co., Inc., Rahway, NJ, USA (United States) (US)
- Pfizer (United States) (US)
- Corresponding author
- Kane, John M.
- Venue
- Journal of Clinical Psychopharmacology
- Published
- 2010-04
- Volume
- 30
- Issue
- 2
- Pages
- 106-115
- ISSN
- 0271-0749 (ISSN-L)
- OpenAlex
- W2050370233
- Cited by
- 126
- References
- 46
- Citations by year
- 2025: 2 · 2024: 7 · 2023: 1 · 2022: 6 · 2021: 7 · 2020: 6 · 2019: 6 · 2018: 2 · 2017: 4 · 2016: 8 · 2015: 9 · 2014: 12 · 2013: 14 · 2012: 13
- FWCI
- 12.01
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Clinical Psychopharmacology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
- Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
- Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
- Keywords
- asenapine, haloperidol, acute schizophrenia, antipsychotic efficacy, extrapyramidal symptoms, treatment-related adverse events, dose comparison, weight change
- MeSH terms
- Acute Disease, Adult, Dibenzocycloheptenes, Double-Blind Method, Female, Haloperidol, Heterocyclic Compounds, 4 or More Rings, Humans, Male, Schizophrenia, Treatment Outcome, Akathisia, Drug-Induced, Parkinsonian Disorders
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