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  • Title: Comparison of rapidly acting intramuscular olanzapine, lorazepam, and placebo: a double-blind, randomized study in acutely agitated patients with dementia.
    Author: Meehan KM, Wang H, David SR, Nisivoccia JR, Jones B, Beasley CM, Feldman PD, Mintzer JE, Beckett LM, Breier A.
    Journal: Neuropsychopharmacology; 2002 Apr; 26(4):494-504. PubMed ID: 11927174.
    Abstract:
    This double-blind study investigated the efficacy and safety of rapid-acting intramuscular olanzapine in treating agitation associated with Alzheimer's disease and/or vascular dementia. At 2 h, olanzapine (5.0 mg, 2.5 mg) and lorazepam (1.0 mg) showed significant improvement over placebo on the PANSS Excited Component (PANSS-EC) and Agitation-Calmness Evaluation Scale (ACES), and both 5.0 mg olanzapine and lorazepam showed superiority to placebo on the Cohen-Mansfield Agitation Inventory. At 24 h, both olanzapine groups maintained superiority over placebo on the PANSS-EC; lorazepam did not. Olanzapine (5.0 mg) and lorazepam improved ACES scores more than placebo. Simpson-Angus and Mini-Mental State Examination scores did not change significantly from baseline. Sedation (ACES > or =8), adverse events, and laboratory analytes were not significantly different from placebo for any treatment. No significant differences among treatment groups were seen in extrapyramidal symptoms or in corrected QT interval at either 2 h or 24 h, and no significant differences among treatment groups were seen in vital signs, including orthostasis. Intramuscular injection of olanzapine may therefore provide substantial benefit in rapidly treating inpatients with acute dementia-related agitation.
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