Summary
The effects of placebo and DA2 antidopaminergic agents on basal and stimulated catecholamine (CA) plasma levels in humans have been evaluated by administration either of domperidone or metoclopramide to separate groups of subjects. The latter group was subjected domperidone to sympathetic stimulation by handgrip coldpressor tests, and standing. Pharmacological DA2 receptor blockade, either peripheral by or central and peripheral by metoclopramide, did not modify plasma CA whilst resting or during acute sympathetic stimulation. It is concluded that endogenous dopamine does not seem to play a significant role in modulating NE release in man, at least not under the physiological conditions examined.
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Mannelli, M., De Feo, M.L., Maggi, M. et al. Does endogenous dopamine modulate human sympathetic activity through DA2 receptors?. Eur J Clin Pharmacol 29, 159–164 (1985). https://doi.org/10.1007/BF00547415
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DOI: https://doi.org/10.1007/BF00547415