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Acute effects of desipramine and clomipramine on pituitary-adrenal axis in man.

Brain neurotransmitters play an essential role in central regulation of hypothalamic factors which stimulate or inhibit the secretion of pituitary hormones. Insight in this complex system might be obtained by analysing changes in pituitary and peripheral hormone secretion following the administration of neuroactive drugs which influence the action of neurotransmitters. Desipramine is well-known to inhibit presynaptic norepinephrine reuptake, clomipramine on the other hand interferes with the serotoninergic system. In 15 male volunteers, the effects of single-dose administration of each drug were studied in comparison to placebo. Basal concentrations of ACTH and cortisol, as well as the rise of both hormones following insulin-induced hypoglycemia, were studied. Basal cortisol values and the response to hypoglycemia were not affected by either pharmacon in this study. Slight differences could be seen in the ACTH responses, which were however not significant.