• A loss of cortical noradrenergic innervation may contribute to the intellectual deterioration in Alzheimer's disease. To test the hypothesis that noradrenergic replacement may confer symptomatic benefit, a double-blind, placebo-controlled therapeutic trial with clonidine hydrochloride (Catapres), a centrally active noradrenergic receptor agonist, was undertaken in eight patients with the clinical diagnosis of Alzheimer's disease. No statistically significant changes in cognitive function were found over a range of doses, including those that produced clinically observable side effects. These preliminary results indicate a need for alternative noradrenergic replacement strategies in Alzheimer's disease.
Mohr E, Schlegel J, Fabbrini G, et al. Clonidine Treatment of Alzheimer's Disease. Arch Neurol. 1989;46(4):376–378. doi:10.1001/archneur.1989.00520400030015
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