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Abstract
3,4-Diaminopyridine (3,4-DAP) is a potassium channel blocker that has recently demonstrated an antioscillatory effect in humans by significantly reducing downbeat nystagmus. Based on the presumed role of intrinsic oscillations in the pathophysiology of essential tremor (ET), the authors conducted a double-blind, placebo-controlled crossover study assessing the antitremor effect of a single dose of 3,4-DAP in 19 patients with ET. They did not find any significant change in tremor severity as measured by clinical ratings or accelerometry.
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