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A Study of the Effects of Desipramine Treatment Alone and in Combination with L-Triiodothyronine on 6-Sulphatoxymelatonin Excretion in Depressed Patients

Published online by Cambridge University Press:  02 January 2018

J. Bearn*
Affiliation:
Institute of Psychiatry
J. Arendt
Affiliation:
Department of Biochemistry, University of Surrey
S. A. Checkley
Affiliation:
Maudsley Hospital, London
*
Institute of Psychiatry, De Crespigny Park, London SE5 8AF

Abstract

Urinary 6-sulphatoxymelatonin (αMT6s) excretion was measured after one day and one, two and three weeks of desipramine treatment in eight depressed patients. There was a significant increase in the urinary excretion of αMT6s after one week of treatment, and at no time was there any decrease in αMT6s excretion. These findings are opposed to the hypothesis that desipramine reduces noradrenergic neurotransmission in the human pineal. In a further five patients whose depression was resistant to desipramine alone, urinary αMT6s excretion was measured during treatment with adjunctive L-triiodothyronine (T3). There was no change in αMT6s excretion, and thus the previously reported potentiation of the efficacy of tricyclic antidepressants in combination with T3 does not appear to be mediated through an alteration in noradrenergic neurotransmission.

Type
Papers
Copyright
Copyright © Royal College of Psychiatrists, 1989 

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