Abstract
Abstract Objective: Olanzapine is an atypical antipsychotic medication and known for metabolic side effects but olanzapine-induced obsessive–compulsive symptoms are another important behavioral side effects which are less studied and only a few case reports reported these side effects. This study aims to estimate the prevalence and pattern of olanzapine-induced obsessive–compulsive symptoms in schizophrenia and bipolar affective disorders (BPADs). Methods: Subjects were recruited from psychiatry outpatient department. Subjects with schizophrenia (n = 41) and BPAD (n = 18) taking olanzapine at least more than 6 months were evaluated for clinical profile and the presence of obsession and compulsion symptoms by means of Yale-Brown Obsessive–Compulsive Symptom (YBOCS) checklist scale and data were collected on the structured format. Results: Eighteen (30.5%) of the 59 patients met YBOCS checklist scale for both obsessive–compulsive symptoms among subjects with schizophrenia and BPAD subjects. The mean duration of olanzapine intake was 2 years and the mean dose of olanzapine was 12.5 ± 5.21 mg in obsessive–compulsive symptoms (OCSs) present subjects and the mean dose was 13.78 ± 5.21 mg in subjects not having OCSs. Contamination was the most common obsession and checking was the most common compulsion. Conclusions: These findings suggest that obsessive–compulsive symptoms occur in a substantial percentage of patients taking olanzapine in schizophrenia and BPAD and most of the subjects had more than one OCS.
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