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Clonidine suppression test

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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This may be used to confirm a diagnosis of phaeochromocytoma. Clonidine suppresses the release of adrenaline and noradrenaline from nerve-endings but not from tumour.

300 ug of clonidine is taken orally and plasma samples at 0, 1, 2 and 3 hours assayed for adrenaline and noradrenaline.


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