Journal
XENOBIOTICA
Volume 51, Issue 4, Pages 404-412Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00498254.2020.1867330
Keywords
Cocktail approach; cytochrome P450; drug-drug interaction; verification; literature review; comparative analysis; inducer; inhibitor
Categories
Funding
- JSPS KAKENHI [JP 26460202]
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A cocktail approach was utilized to comprehensively evaluate CYP activity. Comparing the results from cocktail study and single study, a strong positive correlation of the AUC ratios was obtained, indicating that the cocktail study is an adequate method for evaluating DDIs quantitatively. The differences in AUC change ratios between single studies and cocktail study were acceptable for almost all combinations, demonstrating the reliability of the cocktail approach in assessing DDIs.
1. A cocktail approach is a method to comprehensively evaluate the activity of cytochrome P450 enzymes (CYPs) by co-administering multiple CYP substrates. This is the first report that compares the results from a cocktail study to a single substrate separate administration study (single study) with concomitant administration of CYP inducers/inhibitors. The validity of a cocktail study for use as a quantitative drug-drug interactions (DDIs) assessment was evaluated. 2. We administered a cocktail drug (caffeine, losartan, omeprazole, dextromethorphan, midazolam) with rifampicin, cimetidine or fluvoxamine. A comparative analysis was performed between the results of a cocktail study and single studies. The results of single studies were obtained from a literature review and the trials of single substrate separate administration. 3. A strong positive correlation of the AUC ratio of all drugs between single studies and the cocktail study was obtained. The ratio of AUC change of 12 combinations converged to 0.82-1.09, and 2 combinations ranged between 0.74-1.32. 4. The differences in the degree of interaction between the single studies and cocktail study are acceptable to evaluate DDIs for almost all combinations. Our results indicate that a cocktail study is an adequate and quantitative evaluation method for DDIs.
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