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clonidine suppression test

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clonidine
a centrally acting, α-adrenergic, antihypertensive agent; known to stimulate growth hormone release in dogs.

clonidine stimulation test
used in the diagnosis of pituitary dwarfism. Administration of clonidine causes a marked increase in blood levels of growth hormone in normal dogs.
clonidine suppression test
used in the diagnosis of pheochromocytoma in humans. Normally, clonidine suppresses the release of catecholamines, but it does not have this effect on tumor function.

clonidine suppression test
The inability of clonidine, an α2-agonist, to suppress catecholamine secretion, a finding suggestive of a pheochromocytoma. See Pheochromocytoma.


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