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Related Experiment Videos

Increased sensitivity to nitrazepam in old age.

C M Castleden, C F George, D Marcer

    British Medical Journal
    |January 1, 1977
    PubMed
    Summary
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    Nitrazepam improved sleep in both young and elderly individuals but reduced alertness. Elderly adults showed greater impairment on psychomotor tests, suggesting increased brain sensitivity to nitrazepam.

    Area of Science:

    • Pharmacology
    • Gerontology
    • Neuroscience

    Background:

    • Nitrazepam is a benzodiazepine commonly used for insomnia.
    • Age-related changes may alter drug responses, particularly in the central nervous system.

    Purpose of the Study:

    • To compare the effects of a 10 mg oral dose of nitrazepam versus placebo in healthy young and elderly adults.
    • To investigate age-related differences in nitrazepam's impact on sleep, alertness, and psychomotor performance.

    Main Methods:

    • A randomized, placebo-controlled study involving healthy young and elderly participants.
    • Administration of a single 10 mg oral dose of nitrazepam or placebo.
    • Assessment of sleep quality, subjective alertness, and performance on psychomotor tests at various time points.

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    Main Results:

    • Both young and elderly participants reported improved sleep quality for three nights after nitrazepam administration.
    • Subjective alertness was significantly reduced in both groups at 12 and 36 hours post-dose (P < 0.01).
    • Elderly individuals exhibited significantly poorer performance on psychomotor tests compared to young adults, despite comparable nitrazepam plasma concentrations and half-lives.

    Conclusions:

    • Nitrazepam effectively improves sleep in both young and elderly individuals.
    • Elderly individuals demonstrate increased sensitivity to the psychomotor-impairing effects of nitrazepam, likely due to age-related alterations in brain function.