Delusional Infestation Successfully Controlled With Neuroleptic Depot Injection: A Case Report

ABSTRACT

Delusional infestation is a psychiatric condition in which a patient belief that they are infested with living organisms in the absence of any objective evidence. The objective of this case report is to highlight a rare case of delusional infestations in a patient with schizophrenia who misusing polysubstance abuse. Methods: We report a case of 36-year-old Malay gentlemen, unemployed, married with three children, known case of schizophrenia since 2013, with history of polysubstance abuse presented to the emergency department with symptoms of itching followed by a sensation of insects crawling, biting and burrowing under the skin on his head causing an ulcerated wound. Results: He was diagnosed to be suffering from schizophrenia and was successfully treated with monthly antipsychotic depot injection in view of his poor adherence to medication On examination, ulcerated scalp wound measuring 4 x 4 cm was noted at the parieto-occipital region of the scalp. Skull X-ray and computerized tomography (CT) scan of the brain were normal. Electroconvulsive therapy (ECT) was introduced in view of slow treatment response and self-inflicted injury. The symptoms were successfully controlled after eight months, and no extrapyramidal side effect was observed. Conclusion: Patients with delusional infestation often poorly adhered to his treatment medication and the usage of depot injection of antipsychotic may benefited some patients to control the psychotic symptoms. ASEAN Journal of Psychiatry, Vol. 17 (2) July – December 2016 XX XX.