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Related Experiment Videos

Stable isotope method for studying transdermal drug absorption: the nicotine patch.

N L Benowitz1, K Chan, C P Denaro

  • 1Clinical Pharmacology Unit of the Medical Service, San Francisco General Hospital Medical Center, CA 94110.

Clinical Pharmacology and Therapeutics
|September 1, 1991
PubMed
Summary

Stable isotope methods accurately measured transdermal nicotine-delivery system (TTS) bioavailability. This research aids in developing TTS for smoking cessation, showing 82% bioavailability and a skin nicotine reservoir.

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Area of Science:

  • Pharmacology
  • Drug Delivery
  • Analytical Chemistry

Background:

  • Transdermal nicotine-delivery systems (TTS) are crucial for smoking cessation.
  • Understanding the absorption kinetics and bioavailability of TTS is essential for optimizing therapy.
  • Stable isotope-labeled drug methods offer a precise tool for pharmacokinetic studies.

Purpose of the Study:

  • To determine the absolute bioavailability and absorption kinetics of a transdermal nicotine-delivery system (TTS).
  • To evaluate the utility of stable isotope-labeled drug methods in assessing transdermal drug delivery.
  • To characterize the absorption profile of nicotine delivered via TTS in cigarette-abstinent smokers.

Main Methods:

  • Stable isotope-labeled drug method using deuterium-labeled nicotine.

Related Experiment Videos

  • Simultaneous infusion of labeled nicotine during TTS application for 24 hours.
  • Pharmacokinetic analysis in 11 cigarette-abstinent smokers with good patch adhesion.

    • Main Results:

    • Average systemic nicotine delivery of 19 mg with 82% absolute bioavailability.
    • Nicotine absorption rate peaked between 6-12 hours post-application, then declined.
    • A skin reservoir effect was observed, with 10% nicotine absorption after TTS removal.

    Conclusions:

    • Stable isotope methods are applicable for studying the clinical pharmacology of transdermal drugs.
    • TTS demonstrates high bioavailability and a predictable absorption pattern.
    • Findings support the use of TTS as an adjunct in smoking-cessation therapy.