The endocrine effects of a relatively potent dopaminergic agent, dihydroergokryptine, have been studied in normal subjects, and in hyperprolactinaemic and acromegalic patients. A single 6 mg oral dose of the drug caused a marked, long lasting fall in prolactin (PRL) plasma levels in healthy subjects, in hyperprolactinaemic patients and in normoprolactinaemic acromegalics. Growth hormone (GH) levels decreased in l-DOPA — responder, acromegalic patients, but dihydroergokryptine did not affect GH levels in normal volunteers or in l-DOPA non — responder, acromegalic patients. The PRL-and GH- lowering activity of 6 mg dihydroergokriptine was significantly greater than that of 6 mg dihydroergocristine, and was similar to that of an oral dose of 500 mg l-DOPA.
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Ferrari, C., Rampini, P., Paracchi, A. et al. Effect of dihydroergokryptine administration on serum prolactin and growth hormone levels in normal, hyperprolactinaemic and acromegalic subjects: Evidence of potent and long-lasting pituitary dopamine receptor stimulation. Eur J Clin Pharmacol 27, 707–711 (1985). https://doi.org/10.1007/BF00547054
- growth hormone