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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Clinical efficacy of serotonin-dopamine antagonists relative to classic neuroleptics.

Serotonin-dopamine antagonists (SDAs) offer the possibility of improved treatment of schizophrenia compared with conventional neuroleptics and have superior safety profiles. Clinical trial data have so far been published for only three SDAs to date, namely, risperidone, sertindole, and olanzapine. Of these, extensive data are available only for risperidone, showing that at doses of 4 to 16 mg/day, it is superior to haloperidol at 10 to 20 mg/day. Furthermore, risperidone, 6 and 16 mg/day, significantly improved negative/symptoms, whereas 20 mg/day of haloperidol was ineffective. Risperidone also appears to cause fewer extrapyrimidal symptoms (EPS) than haloperidol, 10 or 20 mg/day. Similar advantages of risperidone over perphenazine have also been found. A clinical trial of sertindole showed that, at 20 mg/day, it was equivalent to haloperidol, 16 mg/day, and caused fewer EPS. Olanzapine, a chemical derivative of clozapine, has also been shown to be superior to haloperidol (10 to 20 mg/day) at doses of 7.5 to 17.5 mg/day. In addition, at doses of 12.5 to 17.5 mg/day, olanzapine was found to have a significantly superior effect on negative symptoms over haloperidol, 10 to 20 mg/day. Doses of up to 17.5 mg/day of olanzapine also caused fewer EPS than haloperidol, 10 to 20 mg/day. There was no evidence of any leukopenia in patients treated with olanzapine in this small study (N = 335). The low EPS liability of these SDAs, combined with their efficacy, suggests that SDAs should become the mainstay of treatment for schizophrenia.[1]


  1. Clinical efficacy of serotonin-dopamine antagonists relative to classic neuroleptics. Borison, R.L. Journal of clinical psychopharmacology. (1995) [Pubmed]
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