Antipsychotic efficacy of the dopaminergic autoreceptor agonist EMD 49980 (Roxindol). Results of an open clinical study.
EMD 49980 is a dopamine agonist with selective affinity to dopamine autoreceptors. Following pharmacological findings in animal studies, it was postulated that a hyperactivity of dopaminergic neurons, which is possibly present in acute schizophrenia, may be reduced by autoreceptor stimulation. To investigate the antipsychotic efficacy of EMD 49980, 20 acutely ill schizophrenics (ICD No. 295.3) were treated over four weeks with dosage increasing up to 3 mg or 9 mg. According to previously defined criteria four patients were clear responders, but clinically none of them revealed a full remission. Ten patients were nonresponders, and three of these patients were drop-outs because of marked deterioration of schizophrenic symptoms. The explorative analysis of BPRS subscales shows a statistically significant reduction of anxiety/depression and anergia, but no clear influence on the subscales THOT, HOST, and ACTV, which are the more specific scales for acute schizophrenia. EMD 49980 was subjectively well tolerated and there was no case of drug-induced extrapyramidal side-effects. In view of the only moderate antipsychotic efficacy in acute schizophrenia and the fact that antidepressant and anxiolytic effects were also observed, a clinical investigation of EMD 49980 in affective disorders and in schizophrenia with depression or anergia should be performed.
Psychiatric Clinic, Heinrich-Heine-Universität.
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D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D014150:Antipsychotic Agents / Q000009:adverse effects / Q000627:therapeutic use*; D004341:Drug Evaluation; D006801:Humans; D007211:Indoles / Q000009:adverse effects / Q000627:therapeutic use*; D008875:Middle Aged; D000078183:Oxindoles; D011569:Psychiatric Status Rating Scales; D011725:Pyridines / Q000009:adverse effects / Q000627:therapeutic use*; D011954:Receptors, Dopamine / Q000502:physiology*; D012559:Schizophrenia / Q000188:drug therapy*; D012565:Schizophrenic Psychology
D014150:Antipsychotic Agents; D007211:Indoles; D000078183:Oxindoles; D011725:Pyridines; D011954:Receptors, Dopamine; C059613:roxindole