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Neuroleptic effects on platelet aggregation: a study in normal volunteers and schizophrenics

Published online by Cambridge University Press:  09 July 2009

Timothy G. Dinan
Timothy G. Dinan*
Affiliation:
Department of Psychological Medicine, St. Bartholomew's Hospital, London
*
1Address for correspondence: Dr. T. G. Dinan, Department of Psychological Medicine, St. Bartholomew's Hospital, West Smithfield, London EC1A 7BE.
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Synopsis

Platelet-rich plasma from healthy controls was pre-treated with neuroleptics of the phenothiazine, butyrophenone or benzamide variety before aggregation with one of the following agonist agents: ADP, adrenaline, 5-HT, collagen, platelet activating factor or ristocetin. All compounds effective as antipsychotics, except sulpiride, depressed aggregation. Unmedicated schizophrenics showed aggregation responses indistinguishable from healthy controls. However, within days of treatment with either trifluoroperazine or haloperidol responses became abnormal in acutely psychotic patients. Increased responses to 5-HT and depressed responses to platelet activating factor were detected. After 4 weeks of treatment responses tended to return to normal. Aggregation responses were normal in those patients on long-term depot neuroleptics.

Type
Research Article
Information
Psychological Medicine , Volume 17 , Issue 4 , November 1987 , pp. 875 - 881
Copyright
Copyright © Cambridge University Press 1987

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