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  • Title: Effects of daytime administration of zolpidem versus triazolam on memory.
    Author: Wesensten NJ, Balkin TJ, Belenky GL.
    Journal: Eur J Clin Pharmacol; 1995; 48(2):115-22. PubMed ID: 7589024.
    Abstract:
    To determine whether zolpidem (an imidazopyridine hypnotic) produces amnestic effects which are similar to those produced by triazolam (a benzodiazepine hypnotic), 70 subjects were administered either triazolam (0.125, 0.25, or 0.5 mg), zolpidem (5, 10, or 15 mg) or placebo, then tested on Simulated Escape, Restricted Reminding, and Paired-Associates memory tests at 1.5 hours post-dosing (i.e., near the time of estimated peak blood concentration for both drugs) and again at 6 hours post-dosing. Triazolam 0.5 mg produced the greatest memory impairment at both test times, and also produced the greatest degree of sedation during intervening daytime naps in a non-sleep-conducive environment. Other doses of triazolam and zolpidem produced less memory impairment, but also failed to significantly enhance sleep. The results are consistent with the view that the amnestic and hypnotic effects of these sleep-inducing medications are functionally coupled.
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