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Related Experiment Videos

Cimetidine does not increase alpha 1-acid glycoprotein serum concentrations.

R C Parish1, V P Gotz, J L Mehta

  • 1Department of Pharmacy Practice, College of Pharmacy, University of Georgia, Athens 30602.

British Journal of Clinical Pharmacology
|April 1, 1988
PubMed
Summary

Cimetidine therapy did not significantly alter serum alpha 1-acid glycoprotein (AAG) concentrations in healthy volunteers. This suggests drug-AAG binding changes are unlikely to cause cimetidine drug interactions.

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Area of Science:

  • Pharmacology
  • Biochemistry

Background:

  • Alpha 1-acid glycoprotein (AAG) is a key plasma protein involved in drug binding.
  • Cimetidine is a widely used medication known to affect drug metabolism and interactions.

Purpose of the Study:

  • To investigate the effect of cimetidine administration on serum AAG concentrations.
  • To determine if changes in AAG levels contribute to cimetidine-related drug interactions.

Main Methods:

  • Six healthy male volunteers received cimetidine (300 mg every 6 h for 2 days).
  • Serum AAG levels were measured at baseline, day 4, and day 6 of the study.
  • Statistical analysis was performed to assess the impact of cimetidine and time of day on AAG concentrations.

Main Results:

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  • No significant differences in serum AAG concentrations were observed between baseline and post-cimetidine administration.
  • Neither cimetidine treatment nor the time of day significantly affected serum AAG levels.
  • No significant interaction was found between cimetidine treatment and time of day regarding AAG concentrations.

Conclusions:

  • Cimetidine therapy does not appear to significantly alter serum AAG concentrations in healthy individuals.
  • Altered drug-AAG binding due to cimetidine is unlikely to be a major mechanism for cimetidine drug interactions.