Case reports of postmarketing adverse event experiences with olanzapine intramuscular treatment in patients with agitation.
OBJECTIVE
Agitation is a medical emergency with increased risk for poor outcome. Successful treatment often requires intramuscular (IM) psychotropics. Safety data from the first 21 months of olanzapine IM, approved in the United States for the treatment of agitation associated with schizophrenia and bipolar disorder, are presented.


METHODS
A Lilly-maintained safety database was searched for all spontaneous adverse events (AEs) reported in temporal association with olanzapine IM treatment.


RESULTS
The estimated worldwide patient exposure to olanzapine IM from January 1, 2004, through September 30, 2005, was 539,000; 160 cases containing AEs were reported from patients with schizophrenia (30%), bipolar disorder (21%), unspecified psychosis (10%), dementia (8%), and depression (5%). Many reported concomitant treatment with benzodiazepines (39%) or other antipsychotics (54%). The most frequently reported events involved the following organ systems: central nervous (21%), cardiac (12%), respiratory (6%), vascular (6%), and psychiatric (5%). Eighty-three cases were considered serious, including 29 fatalities. In these fatalities, concomitant benzodiazepines or other antipsychotics were reported in 66% and 76% of cases, respectively. The most frequently reported events in the fatal cases involved the following organ systems: cardiovascular (41%), respiratory (21%), general (17%), and central nervous (10%). The majority of fatal cases (76%) included comorbid conditions and potentially clinically significant risk factors for AEs.


CONCLUSIONS
Clinicians should use care when treating agitated patients, especially when they present with concurrent medical conditions and are treated with multiple medications, which may increase the risk of poor or even fatal outcomes. Clinicians should use caution when using olanzapine IM and parenteral benzodiazepines simultaneously.
Building 210, Room 130, West Los Angeles VA Healthcare Center, 11301 Wilshire Blvd, Los Angeles, CA 90073, USA. marder@UCLA.edu
Stephen R
SR
Marder
Sebastian
S
Sorsaburu
Eduardo
E
Dunayevich
Jamie L
JL
Karagianis
Ian C
IC
Dawe
Deborah M
DM
Falk
Mary Anne
MA
Dellva
Janice L
JL
Carlson
Patrizia A
PA
Cavazzoni
Robert W
RW
Baker
D000293:Adolescent; D000328:Adult; D016907:Adverse Drug Reaction Reporting Systems / Q000706:statistics & numerical data*; D000368:Aged; D000369:Aged, 80 and over; D014150:Antipsychotic Agents / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D001569:Benzodiazepines / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D001714:Bipolar Disorder / Q000188:drug therapy / Q000401:mortality / Q000523:psychology; D002648:Child; D019992:Databases as Topic / Q000706:statistics & numerical data; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D007273:Injections, Intramuscular; D008297:Male; D008875:Middle Aged; D000077152:Olanzapine; D011595:Psychomotor Agitation / Q000188:drug therapy*; D012307:Risk Factors; D012559:Schizophrenia / Q000188:drug therapy / Q000401:mortality; D012565:Schizophrenic Psychology; D016896:Treatment Outcome
D014150:Antipsychotic Agents; D001569:Benzodiazepines; D000077152:Olanzapine