RESUMO
The role of dopamine D3 receptors playing in drug dependence has attracted a lot of attention.Pharmacological experiments suggest that dopamine D3 receptors be involved in mechanism of drug addiction and affect the movement and behavior of rodents. Dopamine D3 receptor gene is considered as a candidate gene related to dopaminergic system dysfunction including schizophrenic disorders and essential tremor.
RESUMO
OBJECTIVE: This open-label, multi-center, non-randomized study evaluated the efficacy, safety and tolerability of olanzapine in the treatment of schizophrenia or schizophreniform disorder among Filipino patients. METHOD: Filipino outpatients with a DSM-IV diagnosis of either schizophrenia or schizophreniform disorder (N = 382) were enrolled in this study. They were treated with an initial dose of 10 mg/day of olanzapine with eventual titration to 5 to 20 mg/day as clinically indicated and were observed for 8 weeks. Efficacy was assessed with the Brief Psychiatric Rating Scale (BPRS) and Clinical Global Impression - Severity of Illness Scale (CGI-S). Safety was assessed by collecting adverse event reports and checking vital signs. RESULTS: Statistically significant reductions from baseline to endpoint in both the mean BPRS Total score (from 36.77 +/- 12.12 to 11.43 +/10.39, p0.001) and mean CGI-S score (from 4.64 +/- 0.79 to 2.61 +/- 1.06, p0.001) were seen. The proportion of patients showing 20 percent improvement based on the BPRS Total score was 93.4 percent. Only 51 (13.7 percent) patients reported at least one treatment-emergent adverse event. The most commonly reported were somnolence (3.2 percent), weight loss (2.2 percent), tachycardia (1.3 percent), and headache (1.1 percent). CONCLUSION: The study clearly demonstrates the efficacy, safety and tolerability of olanzapine in the treatment of schizophrenia and schizophreniform disorder among Filipino patients.