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Transdermal fentanyl disposition in elderly subjects

M T Holdsworth1, W B Forman, T A Killilea

  • 1College of Pharmacy, University of New Mexico, Albuquerque 87131.

Gerontology
|January 1, 1994
PubMed
Summary
This summary is machine-generated.

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Elderly individuals experienced adverse effects requiring early removal of fentanyl patches, leading to higher effective serum concentrations compared to young adults. This suggests altered fentanyl pharmacokinetics in older populations.

Area of Science:

  • Pharmacology
  • Geriatrics
  • Drug Metabolism

Background:

  • Transdermal fentanyl patches are used for pain management.
  • Age-related changes can affect drug pharmacokinetics.

Purpose of the Study:

  • To compare the pharmacokinetics of a fentanyl transdermal patch in elderly and young healthy subjects.
  • To investigate potential differences in absorption and clearance between age groups.

Main Methods:

  • A 20-cm2 fentanyl 24-hour transdermal patch was administered to 10 elderly (67-87 years) and 6 young (19-27 years) subjects.
  • Serum fentanyl concentrations were monitored over time.
  • Patch duration (PD) and area under the curve (AUC0-60) were calculated.
  • AUC0-60 was corrected for PD (AUC0-60/PD) to estimate effective serum concentrations.

Related Experiment Videos

Main Results:

  • All elderly subjects required premature patch removal due to adverse effects, unlike young subjects.
  • Mean patch duration was significantly shorter in the elderly (11.7 +/- 4.9 h).
  • Corrected AUC0-60/PD was significantly higher in elderly subjects (2.05 +/- 1.10 ng/ml) compared to young subjects (0.88 +/- 0.44 ng/ml).

Conclusions:

  • Elderly subjects exhibit higher effective serum fentanyl concentrations from transdermal patches.
  • This indicates increased fentanyl absorption and/or decreased clearance in the elderly population.
  • Dosage adjustments may be necessary for transdermal fentanyl use in older adults.