Excessive motor impairment two hours after Triazolam in the elderly

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Abstract
The pharmacokinetics of triazolam 0.25 mg p.o. and psychomotor coordination were compared in nine healthy, elderly volunteers and nine middle aged controls. Motor coordination, as measured by pursuit rotor performance, was impaired in the elderly even before triazolam administration, and in contrast to the controls it deteriorated to a critical level after the drug. Factors associated with the major decrease in psychomotor performance in the elderly volunteers were poor baseline performance, an additional independent-age factor, and the plasma concentration of free triazolam. Although short acting benzodiazepines may have a less detrimental effect on performance on the morning following their intake, there may be serious motor incoordination and falls may occur if the patients have to rise during the night, particularly when the plasma concentration is high, i.e. about 2 h after dosing.

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