Mesoridazine and thioridazine: clinical effects and blood levels in refractory schizophrenics.
Seven schizophrenic (according to DSM-III criteria) inpatients completed a two-phase study; each phase had a 1-week drug-free period followed by 6 weeks of a drug trial. The first phase uniformly involved treatment with chlorpromazine, and in the second phase patients received either mesoridazine (N = 3) or thioridazine (N = 4). Clinical ratings (Brief Psychiatric Rating Scale and Clinical Global Impressions) and neuroleptic blood levels were obtained weekly throughout the study. Whereas patients failed to respond to chlorpromazine 1800 mg/day, response to mesoridazine 400 mg/day and to thioridazine 800 mg/day was established on all Brief Psychiatric Rating Scale factors except for anxiety-depression. A higher neuroleptic blood level was achieved with mesoridazine or thioridazine at less than half the reference chlorpromazine dosage. Correlations between neuroleptic blood level and clinical response were positive for mesoridazine, negative for chlorpromazine, and nonsignificant for thioridazine. These findings are consistent with earlier research. We conclude that drug-resistant schizophrenics seem to improve clinically with mesoridazine or thioridazine, unlike with chlorpromazine, and that for mesoridazine this difference may be a function of selective dopamine receptor blockade.[1]References
- Mesoridazine and thioridazine: clinical effects and blood levels in refractory schizophrenics. Vital-Herne, J., Gerbino, L., Kay, S.R., Katz, I.R., Opler, L.A. The Journal of clinical psychiatry. (1986) [Pubmed]
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