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Evaluation of the potential drug-drug interactions of carotegrast methyl with midazolam, prednisolone, or atorvastatin in healthy adults
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  • Shunji Matsuki,
  • Ichiro Oikawa,
  • Tetsuya Koyama,
  • Hiromitsu Imai
Shunji Matsuki
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Ichiro Oikawa
Oita University Faculty Of Medicine Graduate School of Medicine
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Tetsuya Koyama
EA Pharma Co Ltd

Corresponding Author:tetsuya_kouyama@eapharma.co.jp

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Hiromitsu Imai
Oita University Faculty of Medicine
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Abstract

Aims: To evaluate drug-drug interactions between carotegrast methyl, a CYP3A4 inhibitor, and other CYP3A4 substrates, midazolam, atorvastatin, and prednisolone. Methods: A total of 88 healthy volunteers orally received carotegrast methyl 960 mg three times daily for 14 days. A single oral (5 mg) or intravenous (0.017 mg kg-1) midazolam, oral (5 mg) prednisolone, or oral (10 mg) atorvastatin was administered before, with, and after carotegrast methyl treatment. When the 90% confidence interval (CI) for the geometric mean ratios of the pharmacokinetic (PK) parameters with coadministration with carotegrast methyl (day 14) to those before carotegrast methyl administration was between 0.80 and 1.25, no PK interaction were deemed. Results: The Cmax and AUC0-t of oral midazolam before administration of carotegrast methyl was 30.9 ± 9.8 ng mL-1 and 74.5 ± 21.9 ng h mL-1, respectively. The geometric mean ratio of the Cmax and AUC0-t of midazolam on day 14 to those on day -1 was 1.86 (90% CI, 1.64 – 2.11) and 3.07 (90% CI, 2.81 – 3.35), which did not fall within the range of 0.80 – 1.25, suggesting that carotegrast methyl had a PK interaction with midazolam. Similar PK interactions were found for intravenous midazolam and atorvastatin, but not for prednisolone. The inhibitory effect of carotegrast methyl on CYP3A4-mediated metabolism of midazolam and atorvastatin had almost disappeared by 14 days after the end of administration. Conclusion: Carotegrast methyl was classified as a moderate CYP3A4 inhibitor in humans. Carotegrast methyl might enhance the action of drugs that are metabolized by CYP3A4.
28 Sep 2023Submitted to British Journal of Clinical Pharmacology
28 Sep 2023Submission Checks Completed
28 Sep 2023Assigned to Editor
28 Sep 2023Review(s) Completed, Editorial Evaluation Pending
30 Sep 2023Reviewer(s) Assigned
30 Sep 2023Reviewer(s) Assigned
13 Oct 2023Editorial Decision: Revise Minor
10 Nov 20231st Revision Received
10 Nov 2023Submission Checks Completed
10 Nov 2023Assigned to Editor
10 Nov 2023Review(s) Completed, Editorial Evaluation Pending
17 Nov 2023Editorial Decision: Accept