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• W2029889439 abstract "The pharmacokinetics and pharmacodynamics of the benzodiazepine anxiolytic alprazolam (1 mg orally) were compared between young and elderly healthy volunteers. Eight young subjects (mean age 29.8 years) and eight elderly volunteers (mean age 68.4 years) received oral placebo and alprazolam (1.0 mg) in a randomized, double-blind, single-dose crossover study. In the elderly subjects, plasma concentrations were higher, although not significantly so, than in young volunteers 0.25, 0.5, and 0.75 hours after dosage. Apparent elimination half-life, time of maximum concentration, maximum concentration, volume of distribution, and apparent clearance were similar for the two groups. In both groups, alprazolam treatment (versus placebo) produced significant changes in typical benzodiazepine agonist effects, such as increased sedation and fatigue, reduced excitement, increased feelings of spaciness, and perception of thinking slowed. For some measures, the alprazolam-placebo difference was greater in young than in elderly subjects. In both groups, alprazolam significantly impaired performance on the digit-symbol substitution test (DSST). EEG studies indicated significant increases in relative beta amplitude (13-30 Hz range) after alprazolam compared to placebo. Percent DSST decrement and percent EEG change were highly correlated with plasma alprazolam concentrations for both groups. There were modest increases in alprazolam plasma concentration in the elderly compared to the younger group shortly after drug administration, but there was no evidence of increased sensitivity to the pharmacodynamic effects of alprazolam in the elderly." @default.
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• W2029889439 date "1998-01-01" @default.
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• W2029889439 title "Single-Dose Pharmacokinetics and Pharmacodynamics of Alprazolam in Elderly and Young Subjects" @default.
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• W2029889439 doi "https://doi.org/10.1002/j.1552-4604.1998.tb04370.x" @default.
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