Cited by 258Pharmaceutical Practices and Patient OutcomesAnesthesia and Sedative AgentsPharmacogenetics and Drug Metabolism

Sensitivity to triazolam in the elderly

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Greenblatt, David J., Harmatz, Jerold S., Shapiro, Lisa, Engelhardt, Nina, Gouthro, Terry A., Shader, Richard I.·1991·New England Journal of Medicine

Abstract

BACKGROUND: Elderly persons frequently appear to be sensitive to the effects of many drugs that depress the central nervous system. We studied the effect of age on the pharmacokinetics and pharmacodynamics of the benzodiazepine hypnotic agent triazolam, now the most frequently prescribed hypnotic drug in the United States. METHODS: Twenty-six healthy young subjects (mean age, 30 years) and 21 healthy elderly subjects (mean age, 69 years) participated in a four-way crossover study. After a single-blind adaptation trial with placebo, each subject received, in random order and in double-blind fashion, single doses of placebo, 0.125 mg of triazolam, and 0.25 mg of triazolam. For 24 hours after the administration of each of the three study medications, plasma triazolam levels were determined and psychomotor performance, memory, and degree of sedation were assessed. RESULTS: Plasma triazolam concentrations increased in proportion to the dose, but the elderly subjects had higher plasma concentrations due to reduced clearance of the drug. The degree of sedation as rated by an observer and the reduction in the subjects' performance on the digit-symbol substitution test were both greater in the elderly than in the young subjects after they were given the same doses. The relation of the plasma triazolam concentration to the degree of impairment was similar for the two groups. As part of the study, information was presented 1 1/2 hours after the administration of the drugs; the subjects' ability to recall the information 24 hours later was impaired by both doses of triazolam, and the percent decrease was similar in the young and elderly groups. CONCLUSIONS: Triazolam caused a greater degree of sedation and greater impairment of psychomotor performance in healthy elderly persons than in young persons who received the same dose. These effects resulted from reduced clearance and higher plasma concentrations of triazolam rather than from an increased intrinsic sensitivity to the drug. On the basis of these results, the dosage of triazolam for elderly persons should be reduced on average by 50 percent.

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Research works printed but not linked: 2

  1. [9]9. Pakes GE, Brogden RN, Heel RC, Speight TM, Avery GS. Triazolam: a review of its pharmacological properties and therapeutic efficacy in patients with insomnia. Drugs 1981; 22:81-110.
  2. [40]40. Greenblatt DJ. Analysis of benzodiazepines by electron-capture gas-liquid chromatography. In: Sunshine I, Jatlow PI, eds. Methodology in analytical toxicology. Vol. 2. Boca Raton, Fla.: CRC Press, 1982:19-24.

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Authors
Greenblatt, D. J., Harmatz, J. S., Shapiro, L., Engelhardt, N., Gouthro, T. A., & Shader, R. I.
Affiliations
Tufts University (US)
Venue
New England Journal of Medicine
Published
1991-06-13
Volume
324
Issue
24
Pages
1691-1698
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2062847583
Cited by
258
References
65
Citations by year
2026: 2 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 3 · 2020: 6 · 2019: 4 · 2018: 4 · 2017: 2 · 2016: 4 · 2015: 7 · 2014: 1 · 2013: 10 · 2012: 10
FWCI
25.72
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (MH 34223)
Topics
  • Health Sciences › Medicine › Geriatrics and Gerontology › Pharmaceutical Practices and Patient Outcomes
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Anesthesia and Sedative Agents
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
Keywords
triazolam, older adults, age-related drug sensitivity, benzodiazepines, hypnotics, pharmacokinetics, pharmacodynamics, plasma drug concentration, drug clearance, sedation, psychomotor performance, memory impairment, dose adjustment
MeSH terms
Adult, Age Factors, Aged, Aged, 80 and over, Double-Blind Method, Female, Humans, Male, Memory, Middle Aged, Psychomotor Performance, Triazolam

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