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Postinjection Delirium/Sedation Syndrome After 31st Long-Acting Olanzapine Depot Injection
Velprashanth Venkatesan1, Sourav Khanra, Kamalika Mandal
1Department of Psychiatry, Central Institute of Psychiatry, Ranchi, India.
Objective:
Long-acting depot preparations of antipsychotics are the mainstay of treatment for patients with schizophrenia who show nonadherence to their medications. Olanzapine pamoate is one of the recently approved long-acting depot psychotropic preparations that have shown its efficacy both in clinical trials and in clinical uses against the illness. However, emerging literature indicates toward a cluster of adverse effects known as postinjection delirium/sedation syndrome (PDSS).
Methods:
We here present a case of PDSS in a woman with paranoid schizophrenia. After maintaining well for almost 1½ years, she developed PDSS at her 31st scheduled long-acting olanzapine injection.
Results:
Several features of PDSS including its mechanism and course have been discussed.
Conclusions:
More research is necessary to understand the syndrome and the association between PDSS and long-acting olanzapine injection. Clinicians should keep in mind that PDSS may worsen compliance in an index patient and affect the course of the illness.
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