Objectives: To review the existing literature of atypical
antipsychotics in the treatment of delirium and make recommendations
regarding their use in the treatment of delirium.
Methods: I conducted a literature search in Pubmed, Psychlit,
and Embase for studies using atypical antipsychotics in the treatment of
delirium. In the absence of studies, case reports were used.
Results: Overall 13 studies examined the use of risperidone,
olanzapine, and quetiapine, two cases were reported about ziprasidone, and
no publication was found using aripiprazole in the treatment of delirium.
Among the existing studies were retrospective and prospective, open label
studies in addition to one with a double blind design using risperidone.
Risperidone, olanzapine, and quetiapine may be all similarly effective in
the treatment of delirium, whereas there may be limited efficacy in the
use of olanzapine in the hypoactive subtype of delirium in elderly
populations, which may generalize to the other atypical antipsychotics.
The use of atypical antipsychotics in the treatment of delirium is safe
and carries a low burden of side effects.
Significance of results: Although atypical antipsychotics are
widely used in the treatment of delirium, well-designed studies do not
exist. Among the existing studies, stronger data supports the use of
risperidone and olanzapine, and also quetiapine may be considered in the
treatment of delirium. Recommendations are made based on the existing data
and literature. The need for well-designed studies to validate the use of
atypical antipsychotics in the treatment of delirium continues.