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van der Heijden LT, Opdam FL, Beijnen JH, Huitema ADR. The Use of Microdosing for In vivo Phenotyping of Cytochrome P450 Enzymes: Where Do We Stand? A Narrative Review. Eur J Drug Metab Pharmacokinet 2024; 49:407-418. [PMID: 38689161 PMCID: PMC11199305 DOI: 10.1007/s13318-024-00896-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/27/2024] [Indexed: 05/02/2024]
Abstract
Cytochrome P450 (CYP) enzymes play a central role in the elimination of approximately 80% of all clinically used drugs. Differences in CYP enzyme activity between individuals can contribute to interindividual variability in exposure and, therefore, treatment outcome. In vivo CYP enzyme activity could be determined with phenotyping. Currently, (sub)therapeutic doses are used for in vivo phenotyping, which can lead to side effects. The use of microdoses (100 µg) for in vivo phenotyping for CYP enzymes could overcome the limitations associated with the use of (sub)therapeutic doses of substrates. The aim of this review is to provide a critical overview of the application of microdosing for in vivo phenotyping of CYP enzymes. A literature search was performed to find drug-drug interaction studies of CYP enzyme substrates that used microdoses of the respective substrates. A substrate was deemed sensitive to changes in CYP enzyme activity when the pharmacokinetics of the substrate significantly changed during inhibition and induction of the enzyme. On the basis of the currently available evidence, the use of microdosing for in vivo phenotyping for subtypes CYP1A2, CYP2C9, CYP2D6, and CYP2E1 is not recommended. Microdosing can be used for the in vivo phenotyping of CYP2C19 and CYP3A. The recommended microdose phenotyping test for CYP2C19 is measuring the omeprazole area-under-the-concentration-time curve over 24 h (AUC0-24) after administration of a single 100 µg dose. CYP3A activity could be best determined with a 0.1-75 µg dose of midazolam, and subsequently measuring AUC extrapolated to infinity (AUC∞) or clearance. Moreover, there are two metrics available for midazolam using a limited sampling strategy: AUC over 10 h (AUC0-10) and AUC from 2 to 4 h (AUC2-4).
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Affiliation(s)
- Lisa T van der Heijden
- Department of Pharmacology and Pharmacy, Antoni van Leeuwenhoek/The Netherlands Cancer Institute, Amsterdam, The Netherlands.
- Division of Pharmacology, Antoni van Leeuwenhoek/The Netherlands Cancer Institute, Amsterdam, The Netherlands.
- Department of Clinical Pharmacy, OLVG Hospital, Amsterdam, The Netherlands.
| | - Frans L Opdam
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Jos H Beijnen
- Department of Pharmacology and Pharmacy, Antoni van Leeuwenhoek/The Netherlands Cancer Institute, Amsterdam, The Netherlands
- Division of Pharmacology, Antoni van Leeuwenhoek/The Netherlands Cancer Institute, Amsterdam, The Netherlands
- Division of Pharmaco-Epidemiology and Clinical Pharmacology, Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Alwin D R Huitema
- Department of Pharmacology and Pharmacy, Antoni van Leeuwenhoek/The Netherlands Cancer Institute, Amsterdam, The Netherlands
- Division of Pharmacology, Antoni van Leeuwenhoek/The Netherlands Cancer Institute, Amsterdam, The Netherlands
- Department of Clinical Pharmacy, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Department of Pharmacology, Princess Maxima Center, Utrecht, The Netherlands
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Rohr BS, Krohmer E, Foerster KI, Burhenne J, Schulz M, Blank A, Mikus G, Haefeli WE. Time Course of the Interaction Between Oral Short-Term Ritonavir Therapy with Three Factor Xa Inhibitors and the Activity of CYP2D6, CYP2C19, and CYP3A4 in Healthy Volunteers. Clin Pharmacokinet 2024; 63:469-481. [PMID: 38393578 PMCID: PMC11052790 DOI: 10.1007/s40262-024-01350-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND We investigated the effect of a 5-day low-dose ritonavir therapy, as it is used in the treatment of COVID-19 with nirmatrelvir/ritonavir, on the pharmacokinetics of three factor Xa inhibitors (FXaI). Concurrently, the time course of the activities of the cytochromes P450 (CYP) 3A4, 2C19, and 2D6 was assessed. METHODS In an open-label, fixed sequence clinical trial, the effect and duration of a 5-day oral ritonavir (100 mg twice daily) treatment on the pharmacokinetics of three oral microdosed FXaI (rivaroxaban 25 µg, apixaban 25 µg, and edoxaban 50 µg) and microdosed probe drugs (midazolam 25 µg, yohimbine 50 µg, and omeprazole 100 µg) was evaluated in eight healthy volunteers. The plasma concentrations of all drugs were quantified using validated liquid chromatography-tandem mass spectrometry (LC-MS/MS) methods and pharmacokinetics were analysed using non-compartmental analyses. RESULTS Ritonavir increased the exposure of apixaban, edoxaban, and rivaroxaban, but to a different extent the observed area under the plasma concentration-time curve (geometric mean ratio 1.29, 1.46, and 1.87, respectively). A strong CYP3A4 inhibition (geometric mean ratio > 10), a moderate CYP2C19 induction 2 days after ritonavir (0.64), and no alteration of CYP2D6 were observed. A CYP3A4 recovery half-life of 2.3 days was determined. CONCLUSION This trial with three microdosed FXaI suggests that at most the rivaroxaban dose should be reduced during short-term ritonavir, and only in patients receiving high maintenance doses. Thorough time series analyses demonstrated differential effects on three different drug-metabolising enzymes over time with immediate profound inhibition of CYP3A4 and only slow recovery after discontinuation. CLINICAL TRIAL REGISTRATION EudraCT number: 2021-006643-39.
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Affiliation(s)
- Brit S Rohr
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Medical Faculty of Heidelberg, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Evelyn Krohmer
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Medical Faculty of Heidelberg, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Kathrin I Foerster
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Medical Faculty of Heidelberg, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Jürgen Burhenne
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Medical Faculty of Heidelberg, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Martin Schulz
- Drug Commission of German Pharmacists and Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany
| | - Antje Blank
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Medical Faculty of Heidelberg, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Gerd Mikus
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Medical Faculty of Heidelberg, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Walter E Haefeli
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Medical Faculty of Heidelberg, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.
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Bowman C, Dolton M, Ma F, Cheeti S, Kuruvilla D, Sane R, Kassir N, Chen Y. Understanding CYP3A4 and P-gp mediated drug-drug interactions through PBPK modeling - Case example of pralsetinib. CPT Pharmacometrics Syst Pharmacol 2024; 13:660-672. [PMID: 38481038 PMCID: PMC11015073 DOI: 10.1002/psp4.13114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 12/14/2023] [Accepted: 01/29/2024] [Indexed: 04/14/2024] Open
Abstract
Pralsetinib, a potent and selective inhibitor of oncogenic RET fusion and RET mutant proteins, is a substrate of the drug metabolizing enzyme CYP3A4 and a substrate of the efflux transporter P-gp based on in vitro data. Therefore, its pharmacokinetics (PKs) may be affected by co-administration of potent CYP3A4 inhibitors and inducers, P-gp inhibitors, and combined CYP3A4 and P-gp inhibitors. With the frequent overlap between CYP3A4 and P-gp substrates/inhibitors, pralsetinib is a challenging and representative example of the need to more quantitatively characterize transporter-enzyme interplay. A physiologically-based PK (PBPK) model for pralsetinib was developed to understand the victim drug-drug interaction (DDI) risk for pralsetinib. The key parameters driving the magnitude of pralsetinib DDIs, the P-gp intrinsic clearance and the fraction metabolized by CYP3A4, were determined from PBPK simulations that best captured observed DDIs from three clinical studies. Sensitivity analyses and scenario simulations were also conducted to ensure these key parameters were determined with sound mechanistic rationale based on current knowledge, including the worst-case scenarios. The verified pralsetinib PBPK model was then applied to predict the effect of other inhibitors and inducers on the PKs of pralsetinib. This work highlights the challenges in understanding DDIs when enzyme-transporter interplay occurs, and demonstrates an important strategy for differentiating enzyme/transporter contributions to enable PBPK predictions for untested scenarios and to inform labeling.
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Affiliation(s)
| | | | - Fang Ma
- Genentech, Inc.South San FranciscoCaliforniaUSA
| | | | | | - Rucha Sane
- Genentech, Inc.South San FranciscoCaliforniaUSA
| | | | - Yuan Chen
- Genentech, Inc.South San FranciscoCaliforniaUSA
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4
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Lenard A, Hermann SA, Stoll F, Burhenne J, Foerster KI, Mikus G, Meid AD, Haefeli WE, Blank A. Effect of Clarithromycin, a Strong CYP3A and P-glycoprotein Inhibitor, on the Pharmacokinetics of Edoxaban in Healthy Volunteers and the Evaluation of the Drug Interaction with Other Oral Factor Xa Inhibitors by a Microdose Cocktail Approach. Cardiovasc Drugs Ther 2023:10.1007/s10557-023-07443-2. [PMID: 36870039 DOI: 10.1007/s10557-023-07443-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/17/2023] [Indexed: 03/05/2023]
Abstract
PURPOSE We assessed the differential effect of clarithromycin, a strong inhibitor of cytochrome P450 (CYP) 3A4 and P-glycoprotein, on the pharmacokinetics of a regular dose of edoxaban and on a microdose cocktail of factor Xa inhibitors (FXaI). Concurrently, CYP3A activity was determined with a midazolam microdose. METHODS In an open-label fixed-sequence trial in 12 healthy volunteers, the pharmacokinetics of a microdosed FXaI cocktail (μ-FXaI; 25 μg apixaban, 50 μg edoxaban, and 25 μg rivaroxaban) and of 60 mg edoxaban before and during clarithromycin (2 x 500 mg/d) dosed to steady-state was evaluated. Plasma concentrations of study drugs were quantified using validated ultra-performance liquid chromatography-tandem mass spectrometry methods. RESULTS Therapeutic clarithromycin doses increased the exposure of a therapeutic 60 mg dose of edoxaban with a geometric mean ratio (GMR) of the area under the plasma concentration-time curve (AUC) of 1.53 (90 % CI: 1.37-1.70; p < 0.0001). Clarithromycin also increased the GMR (90% CI) of the exposure of microdosed FXaI apixaban to 1.38 (1.26-1.51), edoxaban to 2.03 (1.84-2.24), and rivaroxaban to 1.44 (1.27-1.63). AUC changes observed for the therapeutic edoxaban dose were significantly smaller than those observed with the microdose (p < 0.001). CONCLUSION Clarithromycin increases FXaI exposure. However, the magnitude of this drug interaction is not expected to be clinically relevant. The edoxaban microdose overestimates the extent of the drug interaction with the therapeutic dose, whereas AUC ratios for apixaban and rivaroxaban were comparable to the interaction with therapeutic doses as reported in the literature. TRIAL REGISTRATION EudraCT Number: 2018-002490-22.
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Affiliation(s)
- Alexander Lenard
- Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- Partner Site Heidelberg, German Center for Infection Research, Heidelberg, Germany
| | - Simon A Hermann
- Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- Partner Site Heidelberg, German Center for Infection Research, Heidelberg, Germany
| | - Felicitas Stoll
- Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- Partner Site Heidelberg, German Center for Infection Research, Heidelberg, Germany
| | - Juergen Burhenne
- Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- Partner Site Heidelberg, German Center for Infection Research, Heidelberg, Germany
| | - Kathrin I Foerster
- Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- Partner Site Heidelberg, German Center for Infection Research, Heidelberg, Germany
| | - Gerd Mikus
- Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- Partner Site Heidelberg, German Center for Infection Research, Heidelberg, Germany
| | - Andreas D Meid
- Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- Partner Site Heidelberg, German Center for Infection Research, Heidelberg, Germany
| | - Walter E Haefeli
- Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- Partner Site Heidelberg, German Center for Infection Research, Heidelberg, Germany
| | - Antje Blank
- Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.
- Partner Site Heidelberg, German Center for Infection Research, Heidelberg, Germany.
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Fedina LV, Sychev IN, Rastvorova TD, Strigunkova EV, Kachanova AA, Sozaeva ZA, Bochkov PO, Vardanyan AV, Mirzayev KB, Sychev DA. Effect of ABCB1 Gene Carriage and Drug-Drug Interactions on Apixaban and Rivaroxaban Pharmacokinetics and Clinical Outcomes in Patients with Atrial Fibrillation and Deep Vein Thrombosis. RATIONAL PHARMACOTHERAPY IN CARDIOLOGY 2023. [DOI: 10.20996/1819-6446-2022-12-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Aim. To investigate the effect of ABCB1 gene carriage and interdrug interactions on apixaban pharmacokinetics and clinical outcomes in patients with atrial fibrillation and deep vein thrombosis.Material and methods. Patients hospitalized at Yudin State Clinical Hospital participated in the study. A total of 92 patients (50 patients received apixaban and 42 – rivaroxaban) with non-valvular atrial fibrillation and deep vein thrombosis were included. Genotyping was performed by real-time polymerase chain reaction. Direct oral anticoagulants concentrations were measured using an electrospray ionization mass spectrometer in positive ionization mode.Results. In our study we found that in patients carrying the CT+TT ABCB1 (rs4148738) C>T genotype encoding the carrier protein (P-gp), the plasma concentration of rivaroxaban was statistically significantly higher p= 0.026. In addition, we found that patients taking apixaban together with a CYP3A4/P-gp inhibitor were 3.5 times more likely to have hemorrhagic complications than those without inhibitors p = 0.004.Conclusion. Our study revealed that the plasma concentration of rivaroxaban was higher in patients carrying the ABCB1 (rs4148738) C>T polymorphism T allele. And patients taking apixaban together with CYP3A4/P-gp inhibitor had higher risk of hemorrhagic complications in comparison with patients not taking such drugs. Further studies are needed on the influence of pharmacogenetics and pharmacokinetics on the safety and efficacy profile of apixaban and rivaroxaban, taking into account the trend of systemic approach to optimization of anticoagulant therapy of direct oral anticoagulants based on pharmacokinetic, pharmacogenetic biomarkers.
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Affiliation(s)
- L. V. Fedina
- Russian Medical Academy of Continuous Professional Education
| | - I. N. Sychev
- Russian Medical Academy of Continuous Professional Education
| | | | | | - A. A. Kachanova
- Russian Medical Academy of Continuous Professional Education
| | - Z. A. Sozaeva
- Russian Medical Academy of Continuous Professional Education
| | - P. O. Bochkov
- Russian Medical Academy of Continuous Professional Education
| | - A. V. Vardanyan
- Russian Medical Academy of Continuous Professional Education
| | - K. B. Mirzayev
- Russian Medical Academy of Continuous Professional Education
| | - D. A. Sychev
- Russian Medical Academy of Continuous Professional Education
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Sharma A, Sharma P, Kapila I, Abbot V. A Combination of Novel HIV-1 Protease Inhibitor and Cytochrome P450 (CYP) Enzyme Inhibitor to Explore the Future Prospective of Antiviral Agents: Evotaz. Curr HIV Res 2023; 21:149-159. [PMID: 37221692 DOI: 10.2174/1570162x21666230522123631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 03/27/2023] [Accepted: 04/19/2023] [Indexed: 05/25/2023]
Abstract
Viruses belong to the class of micro-organisms that are well known for causing infections in the human body. Antiviral medications are given out to prevent the spread of disease-causing viruses. When the viruses are actively reproducing, these agents have their greatest impact. It is particularly challenging to develop virus-specific medications since viruses share the majority of the metabolic functions of the host cell. In the continuous search for better antiviral agents, the United States Food and Drug Administration (USFDA) approved a new drug named Evotaz on January 29, 2015 for the treatment of human immunodeficiency virus (HIV). Evotaz is a combined once-daily fixed drug, containing Atazanavir, an HIV protease inhibitor, and cobicistat, an inhibitor of the human liver cytochrome P450 (CYP) enzyme. The medication is created such that it can kill viruses by concurrently inhibiting protease and CYP enzymes. The medicine is still being studied for a number of criteria, but its usefulness in children under the age of 12 is currently unknown. The preclinical and clinical characteristics of Evotaz, as well as its safety and efficacy profiles and a comparison of the novel drug with antiviral medications presently available in the market, are the main topics of this review paper.
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Affiliation(s)
- Abha Sharma
- Faculty of Pharmaceutical Sciences, PCTE Group of Institutes, Campus-2, Near Baddowal Cantt., Ferozpur Road, Ludhiana, 142021, India
| | - Poonam Sharma
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, Solan, 173234, Himachal Pradesh, India
| | - Isha Kapila
- Pharmaceutical Chemistry Department, Chandigarh College of Pharmacy, Landran, Mohali, 140307, Punjab, India
| | - Vikrant Abbot
- Department of Pharmaceutical Sciences, Saraswati Group of Colleges, Gharuan, Mohali, 140413, Punjab, India
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Aydin OC, Aydın S, Barun S. Possible agent for COVID-19 treatment: Rifampicin. World J Virol 2022; 11:391-393. [PMID: 36188747 PMCID: PMC9523331 DOI: 10.5501/wjv.v11.i5.391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/20/2022] [Accepted: 08/25/2022] [Indexed: 02/05/2023] Open
Abstract
Rifampicin is a promising drug for the treatment of coronavirus disease 2019 based on its antiviral properties and recent in silico studies. In silico studies can serve as a foundation for further studies.
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Affiliation(s)
- Ozlem Celik Aydin
- Department of Medical Pharmacology, Erzincan University, Mengucek Gazi Education and Research Hospital, Erzincan 24100, Turkey
| | - Sonay Aydın
- Department of Pharmacology, Gazi University, Ankara 06500, Turkey
- Department of Radiology, Erzincan University, Erzincan 24100, Turkey
| | - Sureyya Barun
- Department of Pharmacology, Gazi University, Ankara 06500, Turkey
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8
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Mar PL, Gopinathannair R, Gengler BE, Chung MK, Perez A, Dukes J, Ezekowitz MD, Lakkireddy D, Lip GYH, Miletello M, Noseworthy PA, Reiffel J, Tisdale JE, Olshansky B. Drug Interactions Affecting Oral Anticoagulant Use. Circ Arrhythm Electrophysiol 2022; 15:e007956. [PMID: 35622425 PMCID: PMC9308105 DOI: 10.1161/circep.121.007956] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Oral anticoagulants (OACs) are medications commonly used in patients with atrial fibrillation and other cardiovascular conditions. Both warfarin and direct oral anticoagulants are susceptible to drug-drug interactions (DDIs). DDIs are an important cause of adverse drug reactions and exact a large toll on the health care system. DDI for warfarin mainly involve moderate to strong inhibitors/inducers of cytochrome P450 (CYP) 2C9, which is responsible for the elimination of the more potent S-isomer of warfarin. However, inhibitor/inducers of CYP3A4 and CYP1A2 may also cause DDI with warfarin. Recognition of these precipitating agents along with increased frequency of monitoring when these agents are initiated or discontinued will minimize the impact of warfarin DDI. Direct oral anticoagulants are mainly affected by medications strongly affecting the permeability glycoprotein (P-gp), and to a lesser extent, strong CYP3A4 inhibitors/inducers. Dabigatran and edoxaban are affected by P-gp modulation. Strong inducers of CYP3A4 or P-gp should be avoided in all patients taking direct oral anticoagulant unless previously proven to be otherwise safe. Simultaneous strong CYP3A4 and P-gp inhibitors should be avoided in patients taking apixaban and rivaroxaban. Concomitant antiplatelet/anticoagulant use confers additive risk for bleeding, but their combination is unavoidable in many cases. Minimizing duration of concomitant anticoagulant/antiplatelet therapy as indicated by evidence-based clinical guidelines is the best way to reduce the risk of bleeding.
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Affiliation(s)
- Philip L Mar
- Division of Cardiology, Department of Medicine, St. Louis University, MO (P.L.M., A.P.)
| | | | - Brooke E Gengler
- Department of Pharmacy, Saint Louis University Hospital, MO (B.E.G.)
| | - Mina K Chung
- Department of Cardiovascular Medicine, Heart, Vascular & Thoracic Institute (M.K.C.)
| | - Arturo Perez
- Division of Cardiology, Department of Medicine, St. Louis University, MO (P.L.M., A.P.)
| | | | - Michael D Ezekowitz
- Lankenau Heart Institute, Bryn Mawr Hospital & Sidney Kimmel Medical College, Wynnewood, PA (M.D.E.)
| | | | - Gregory Y H Lip
- Liverpool Centre for Cardiovascular Science, University of Liverpool & Liverpool Heart & Chest Hospital, United Kingdom (G.Y.H.L.).,Department of Clinical Medicine, Aalborg, Denmark (G.Y.H.L.)
| | | | - Peter A Noseworthy
- Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN (P.A.N.)
| | - James Reiffel
- Division of Cardiology, Department of Medicine, Columbia University, New York (J.R.)
| | - James E Tisdale
- College of Pharmacy, Purdue University (J.E.T.).,School of Medicine, Indiana University, Indianapolis (J.E.T.)
| | - Brian Olshansky
- Division of Cardiology, Department of Medicine, University of Iowa, Iowa City (B.O.)
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9
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Ammar H, Govindu RR. A Dangerous and Unrecognized Interaction of Apixaban. Cureus 2021; 13:e19688. [PMID: 34934565 PMCID: PMC8683972 DOI: 10.7759/cureus.19688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2021] [Indexed: 11/24/2022] Open
Abstract
Direct oral anticoagulants (DOACs) drug-to-drug interactions are underrecognized by clinicians. Apixaban has cytochrome 450 (CYP) mediated metabolism (primarily by CYP3A4). Strong inducers and inhibitors of this enzyme may cause variations in the blood level of apixaban. This report presents a patient who received a femoral artery stent and developed a large retroperitoneal hemorrhage after she was prescribed apixaban in addition to her antiretroviral therapy (AVT) regimen that included cobicistat, a strong CYP3A4 inhibitor. The patient was managed conservatively, and a repeat computed tomography scan in a subsequent admission revealed near resolution of the hematoma. The treating physicians realized that apixaban should not be prescribed with a potent CYP3A4 inhibitor like cobicistat and discontinued it.
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Affiliation(s)
- Hussam Ammar
- Internal Medicine, MedStar Washington Hospital Center, Washington, USA
| | - Rukma R Govindu
- Internal Medicine, The University of Texas Health Science Center at Houston, Houston, USA.,Internal Medicine, The University of Texas Mcgovern Medical School at Houston, Houston, USA
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10
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Rohr BS, Foerster KI, Blank A, Burhenne J, Mahmoudi M, Haefeli WE, Mikus G. Perpetrator Characteristics of Azole Antifungal Drugs on Three Oral Factor Xa Inhibitors Administered as a Microdosed Cocktail. Clin Pharmacokinet 2021; 61:97-109. [PMID: 34273071 PMCID: PMC8761715 DOI: 10.1007/s40262-021-01051-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2021] [Indexed: 02/05/2023]
Abstract
Background Factor Xa inhibitors (FXaIs) are increasingly used without having sufficient drug–drug interaction data. Using a microdosed cocktail methodology could support filling the knowledge gap quickly. Methods In a randomised crossover trial, we investigated the drug–drug interactions between six oral azole antifungals and a microdosed FXaI cocktail containing 25 µg rivaroxaban, 25 µg apixaban, and 50 µg edoxaban. Additionally, different enzyme activities were also monitored using a microdosed cocktail approach. The six different azole antifungals were administered in therapeutic doses over a 24 h period, while the microdosed cocktails were administered 1 h after administration of the azole antifungals. Results Ketoconazole and posaconazole were the strongest perpetrators, showing similar increases as apixaban (area under the concentration–time curve ratio [AUCR] 1.64 and 1.62, respectively) and edoxaban (AUCR 2.08 and 2.1, respectively), whereas ketoconazole increased rivaroxaban 2.32-fold but only increased posaconazole 1.37-fold. All other azole antifungals showed less perpetrator effects on the FXaIs. Cytochrome P450 (CYP) 3A inhibition was confirmed using microdosed midazolam, with ketoconazole also the most potent perpetrator (8.42-fold). Conclusion Drug–drug interactions for three victim drugs of the same drug class (FXaIs) with different clearance mechanisms can be studied using a microdosed cocktail approach. Using members of the azole antifungal drug class as perpetrators, multiple interactions can be studied in one trial, and a more detailed insight into the underlying interaction mechanisms is possible. Clinical Trial Registration EudraCT number: 2017-004453-16. Supplementary Information The online version contains supplementary material available at 10.1007/s40262-021-01051-9.
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Affiliation(s)
- Brit Silja Rohr
- Department of Clinical Pharmacology and Pharmacoepidemiology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Kathrin Isabelle Foerster
- Department of Clinical Pharmacology and Pharmacoepidemiology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Antje Blank
- Department of Clinical Pharmacology and Pharmacoepidemiology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Jürgen Burhenne
- Department of Clinical Pharmacology and Pharmacoepidemiology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Mazyar Mahmoudi
- Department of Clinical Pharmacology and Pharmacoepidemiology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Walter Emil Haefeli
- Department of Clinical Pharmacology and Pharmacoepidemiology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Gerd Mikus
- Department of Clinical Pharmacology and Pharmacoepidemiology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.
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Stöllberger C, Finsterer J. Update on drug interactions with non-vitamin-K-antagonist oral anticoagulants for stroke prevention in elderly patients. Expert Rev Clin Pharmacol 2021; 14:569-581. [PMID: 33757376 DOI: 10.1080/17512433.2021.1908124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Introduction: We update the knowledge, since the last review in 2017, about drug-drug interactions (DDI) of non-vitamin-K-antagonist oral anticoagulants (NOAC) in patients ≥75 years.Areas covered: The literature was searched for: 'dabigatran,' 'rivaroxaban,' 'edoxaban,' or 'apixaban' and drugs, affecting platelet function, CYP3A4-, CYP2C9-, or P-Gp-activity. Pharmacodynamic DDI of NOAC with drugs affecting platelet function like nonsteroidal anti-inflammatory drugs and antiplatelet agents occur most frequently. Pharmacokinetic DDI with NOAC were found for 37 of 117 drugs. Reports about DDI with NOAC were found for 51% of P-gp-affecting, 38% for CYP2C9-affecting and 27% for CYP3A4-affecting drugs. Reports about DDI of cardiovascular drugs with NOAC were the most prevalent, followed by anti-infective and nervous system drugs. NOAC plasma levels were measured in retrospective and cohort studies and were associated with concomitant medication. Reports about DDI of NOAC were found in 71 patients ≥75 years.Expert opinion: The knowledge about DDI of NOAC in elderly patients is very limited. Studies should be carried out to investigate the role of drugs potentially interacting with NOAC, which until now have not been investigated. When studying DDI of NOAC, care should be taken to include elderly patients with impaired renal function and patients on polymedication.
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Affiliation(s)
- Claudia Stöllberger
- 2nd Medical Department with Cardiology and Intensive Care Medicine, Klinik Landstrasse, Wien, Austria
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Burt T, Young G, Lee W, Kusuhara H, Langer O, Rowland M, Sugiyama Y. Phase 0/microdosing approaches: time for mainstream application in drug development? Nat Rev Drug Discov 2020; 19:801-818. [PMID: 32901140 DOI: 10.1038/s41573-020-0080-x] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/13/2020] [Indexed: 12/13/2022]
Abstract
Phase 0 approaches - which include microdosing - evaluate subtherapeutic exposures of new drugs in first-in-human studies known as exploratory clinical trials. Recent progress extends phase 0 benefits beyond assessment of pharmacokinetics to include understanding of mechanism of action and pharmacodynamics. Phase 0 approaches have the potential to improve preclinical candidate selection and enable safer, cheaper, quicker and more informed developmental decisions. Here, we discuss phase 0 methods and applications, highlight their advantages over traditional strategies and address concerns related to extrapolation and developmental timelines. Although challenges remain, we propose that phase 0 approaches be at least considered for application in most drug development scenarios.
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Affiliation(s)
- Tal Burt
- Burt Consultancy LLC. talburtmd.com, New York, NY, USA. .,Phase-0/Microdosing Network. Phase-0Microdosing.org, New York, NY, USA.
| | - Graeme Young
- GlaxoSmithKline Research and Development Ltd, Ware, UK
| | - Wooin Lee
- Seoul National University, Seoul, Republic of Korea
| | | | - Oliver Langer
- Medical University of Vienna, Vienna, Austria.,AIT Austrian Institute of Technology GmbH, Vienna, Austria
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Mikus G, Foerster KI, Schaumaeker M, Lehmann M, Burhenne J, Haefeli WE. Application of a microdosed cocktail of 3 oral factor Xa inhibitors to study drug-drug interactions with different perpetrator drugs. Br J Clin Pharmacol 2020; 86:1632-1641. [PMID: 32159869 PMCID: PMC7373712 DOI: 10.1111/bcp.14277] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/20/2020] [Accepted: 03/03/2020] [Indexed: 12/13/2022] Open
Abstract
AIMS Using 3 different perpetrators the impact of voriconazole, cobicistat and rifampicin (single dose), we evaluated the suitability of a microdose cocktail of factor Xa inhibitors (FXaI; rivaroxaban, apixaban and edoxaban; 100 μg in total) to study drug-drug interactions. METHODS Three cohorts of 6 healthy volunteers received 2 treatments with microdoses of rivaroxaban, apixaban and edoxaban alone and with coadministration of 1 of the perpetrators. Plasma and urine concentrations of microdosed apixaban, edoxaban and rivaroxaban were quantified using a validated ultra-performance liquid chromatography-tandem mass spectrometry with a lower limit of quantification of 2.5 pg/mL. RESULTS Voriconazole caused only a minor interaction with apixaban and rivaroxaban, none with edoxaban. Cobicistat significantly increased exposure of all 3 FXaI with area under the plasma concentration-time curve ratios of 1.67 (apixaban), 1.74 (edoxaban) and 2.0 (rivaroxaban). A single dose of rifampicin decreased the volume of distribution and elimination half-life of all 3 FXaI. CONCLUSIONS The microdosed FXaI cocktail approach is able to generate drug interaction data and can help elucidating the mechanism involved in the clearance of the different victim drugs. This is a safe approach to concurrently study drug-drug interactions with a drug class. (EudraCT 2016-003024-23).
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Affiliation(s)
- Gerd Mikus
- Department of Clinical Pharmacology and PharmacoepidemiologyUniversity Hospital HeidelbergIm Neuenheimer Feld 41069120HeidelbergGermany
| | - Kathrin I. Foerster
- Department of Clinical Pharmacology and PharmacoepidemiologyUniversity Hospital HeidelbergIm Neuenheimer Feld 41069120HeidelbergGermany
| | - Marlene Schaumaeker
- Department of Clinical Pharmacology and PharmacoepidemiologyUniversity Hospital HeidelbergIm Neuenheimer Feld 41069120HeidelbergGermany
| | - Marie‐Louise Lehmann
- Department of Clinical Pharmacology and PharmacoepidemiologyUniversity Hospital HeidelbergIm Neuenheimer Feld 41069120HeidelbergGermany
| | - Jürgen Burhenne
- Department of Clinical Pharmacology and PharmacoepidemiologyUniversity Hospital HeidelbergIm Neuenheimer Feld 41069120HeidelbergGermany
| | - Walter E. Haefeli
- Department of Clinical Pharmacology and PharmacoepidemiologyUniversity Hospital HeidelbergIm Neuenheimer Feld 41069120HeidelbergGermany
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