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Cimetidine does not affect plasma cholinesterase activity.

J R Kambam1, J J Franks

  • 1Department of Anesthesiology, Vanderbilt University Hospital, Nashville, TN 37232.

Anesthesia and Analgesia
|January 1, 1988
PubMed
Summary
This summary is machine-generated.

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Cimetidine administration did not alter plasma cholinesterase (PCHE) activity in patients. In vitro studies also confirmed that cimetidine has no significant effect on PCHE activity at clinically relevant concentrations.

Area of Science:

  • Pharmacology
  • Biochemistry
  • Anesthesiology

Background:

  • Plasma cholinesterase (PCHE) is crucial for metabolizing certain anesthetic drugs.
  • Cimetidine is a commonly used medication that may interact with drug-metabolizing enzymes.

Purpose of the Study:

  • To investigate the in vivo and in vitro effects of cimetidine on plasma cholinesterase (PCHE) activity.

Main Methods:

  • Blood samples were collected from patients before and after cimetidine administration.
  • In vitro assays were performed to assess PCHE activity at various cimetidine concentrations.

Main Results:

  • Oral cimetidine administration showed no significant in vivo effect on PCHE activity.
  • In vitro, cimetidine at concentrations up to 15 µg/ml did not alter PCHE activity.

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Conclusions:

  • Cimetidine does not appear to inhibit plasma cholinesterase activity in vivo or in vitro at clinically relevant concentrations.
  • This suggests no significant pharmacokinetic interaction between cimetidine and PCHE-dependent drugs.