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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Intravenous flumazenil for Parkinson's disease: A single dose, double blind, placebo controlled, cross-over trial.

Flumazenil is a short-acting intravenously administered gamma-aminobutyric acid (GABA) antagonist used to reverse the effects of benzodiazepines. Based upon current basal ganglion models in Parkinson's disease (PD), flumazenil could normalize neuronal signaling at several different locations. We conducted a double-blind, placebo controlled, single dose, cross-over trial of flumazenil and placebo in 16 subjects with PD. Subjects were primarily assessed with serial tapping tests (1 minute for each hand) at 15-minute intervals for 90 minutes after infusion. Secondary assessments included the Unified Parkinson's Disease Rating Scale (UPDRS) Motor part at baseline and 45 minutes after infusion, and global impressions. Subjects then underwent a 90-minute washout and entered the opposite arm of the cross-over. Change in tapping speed compared to baseline improved throughout the 90-minute period (P < 0.0001) and at each individual time (P < 0.01), except for 15 minutes status after infusion, with flumazenil compared to placebo. UPDRS scores tended to improve more on drug, but this finding was not significant. The medication was well tolerated. The most common adverse event on drug was a sense of "light-headedness" or "dizziness." GABA antagonists represent a novel potential treatment class for PD. (c) 2006 Movement Disorder Society.[1]


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