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Gender differences in human pharmacokinetics and pharmacodynamics
C V Fletcher1, E P Acosta, J M Strykowski
1Pediatric AIDS Pharmacology Laboratory, Baylor College of Medicine, Houston, Texas.
Summary
Gender impacts how the body processes drugs (pharmacokinetics) and their effects (pharmacodynamics). Research highlights significant sex-related differences in drug absorption, metabolism, and clinical responses.
Area of Science:
- Pharmacology
- Clinical Pharmacy
- Drug Metabolism
Background:
- Gender differences in drug pharmacokinetics and pharmacodynamics are recognized in animals but understudied in humans.
- Factors like gastric acid, blood flow, body composition, and hormonal changes may influence sex-related pharmacokinetic variations.
- Existing research suggests potential gender-specific differences in drug absorption, distribution, metabolism, and excretion (ADME).
Purpose of the Study:
- To review and synthesize current knowledge on gender-related differences in human pharmacokinetics and pharmacodynamics.
- To highlight the importance of considering sex as a biological variable in drug disposition and clinical effects.
- To identify areas for future research in sex-specific drug action.
Main Methods:
- Literature review of clinical investigations and scientific evidence on gender differences in drug response.
- Analysis of studies examining pharmacokinetic parameters (ADME) across different sexes.
- Evaluation of pharmacodynamic data, including adverse drug reactions and therapeutic effects, stratified by gender.
Main Results:
- Females exhibit greater iron absorption and ethanol bioavailability.
- Sex-related differences observed in the metabolism of mephobarbital, propranolol, and methylprednisolone via cytochrome P450 enzymes.
- Renal excretion of amantadine differs between men and women; women show increased susceptibility to drug-induced torsades de pointes and males have enhanced insulin sensitivity.
Conclusions:
- Significant pharmacokinetic and pharmacodynamic sex-related differences exist in humans, impacting drug efficacy and safety.
- These differences are complex and influenced by various physiological and hormonal factors.
- Further research is crucial to elucidate gender-specific drug disposition and clinical outcomes for personalized medicine.