Multiple hormonal responses to morphine: relationship to diagnosis and dexamethasone suppression.
Plasma cortisol, prolactin (PRL), growth hormone (GH), and thyroid stimulating hormone (TSH) responses to intravenous morphine (0.1 mg/kg body weight) were investigated in five healthy women and 22 female psychiatric inpatients (eight with major depression, 12 with schizophrenia and two with personality disorders) during a 120 min period. The results were also related to a subsequent dexamethasone suppression test (DST). Morphine caused a strong and progressive decline in plasma cortisol which was uniform in controls, depressed, and nondepressed patients. DST nonsuppressors had significantly higher cortisol levels during the entire period, but the same response to morphine. Morphine strongly stimulated PRL secretion, which was found to be significantly smaller in patients than in controls, but no difference was seen between depressed and nondepressed subjects. GH and TSH showed only minor and variable changes after morphine, with no overall significant differences. The data in this study do not support the assumption of a major alteration in opiate receptor responsivity either in depression or in DST nonsuppressor patients insofar as the regulation of the adrenal, thyroid, GH and PRL hormone secretion is concerned.[1]References
- Multiple hormonal responses to morphine: relationship to diagnosis and dexamethasone suppression. Banki, C.M., Arato, M. Psychoneuroendocrinology (1987) [Pubmed]
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