Effect of cyproheptadine administration on insulin secretion in acromegalic, diabetic and normal subjects

J. M. Feldman, C. H. Bivens, J. S. Skyler, H. E. Lebovitz

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The effect of cyproheptadine (Cypro) and Placebo administration on insulin secretion and glucose utilization following i.v. glucose (IVGTT) was evaluated in 8 normal, 7 diabetic and 8 acromegalic subjects. Five of the diabetic subjects had overt diabetes and 2 of the diabetic subjects had 'chemical' diabetes (oral GTT). One of the acromegalic subjects had overt diabetes, while one had borderline glucose tolerance and 6 had normal glucose tolerance (oral GTT). Cypro increased insulin secretion in the acromegalic but not in the diabetic or normal subjects. Methysergide (Methy) increased insulin secretion in acromegalic and diabetic subjects but not in normal subjects. Methy and Cypro both increased insulin secretion in the same acromegalic subjects. None of the 3 groups of subjects had a modification in insulin secretion following Placebo administration. Neither Placebo, Cypro or Methy altered the glucose utilization rate constant (KG). There was no change in insulin half life or tissue sensitivity to insulin from Cypro (normal and acromegalic subjects) or Methy (normal subjects) administration. Despite their increase in insulin secretion in response to serotonin antagonists, acromegalic subjects have normal urinary 5 hydroxyindoleacetic acid excretion and normal serum serotonin concentrations. Their response cannot therefore be attributed to a generalized overproduction of serotonin.

Original languageEnglish (US)
Pages (from-to)279-283
Number of pages5
JournalHormone and Metabolic Research
Issue number4
StatePublished - Jan 1 1975
Externally publishedYes

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Endocrinology
  • Clinical Biochemistry
  • Biochemistry, medical


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