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Effect of exercise on pharmacokinetics.

P Ylitalo1

  • 1Department of Pharmacology and Toxicology, University of Kuopio, Finland.

Annals of Medicine
|August 1, 1991
PubMed
Summary

Exercise significantly impacts drug pharmacokinetics, affecting absorption, distribution, and elimination. This can alter drug effectiveness and toxicity, especially for medications with a narrow therapeutic range.

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General pharmacology·2002

Area of Science:

  • Pharmacology
  • Exercise Physiology
  • Clinical Pharmacy

Background:

  • Growing participation in sports necessitates understanding exercise effects on drug pharmacokinetics.
  • Previous research indicates exercise influences drug absorption, distribution, metabolism, and excretion.

Purpose of the Study:

  • To investigate the pharmacokinetic interactions between exercise and various drug administration routes.
  • To identify potential clinical implications of exercise-induced pharmacokinetic changes.

Main Methods:

  • Review of existing literature on exercise and drug pharmacokinetics.
  • Analysis of physiological changes during exercise affecting drug disposition.

Main Results:

  • Oral drug absorption generally shows minor changes, but parenteral absorption (intramuscular, subcutaneous, transdermal) may increase.
  • Exercise alters drug distribution by affecting blood flow to different tissues (muscle, adipose, liver).
  • Hepatic drug metabolism is reduced for high-clearance drugs but unaffected for low-clearance drugs; renal drug elimination is decreased.

Conclusions:

  • Exercise-induced pharmacokinetic alterations can lead to significant changes in drug efficacy and toxicity.
  • Particular caution is advised for drugs with a narrow therapeutic range administered to individuals engaging in physical activity.

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