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Bozic D, Alicic D, Martinovic D, Zaja I, Bilandzic-Ivisic J, Sodan R, Kresic B, Bratanic A, Puljiz Z, Ardalic Z, Bozic J. Plasma Drug Values of DOACs in Patients Presenting with Gastrointestinal Bleeding: A Prospective Observational Study. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1466. [PMID: 37629757 PMCID: PMC10456420 DOI: 10.3390/medicina59081466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/13/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023]
Abstract
Background and Objectives: Anticoagulants are a well-known risk factor for gastrointestinal bleeding (GIB). In recent years, direct oral anticoagulants (DOACs) have taken a leading role in the treatment and prevention of thromboembolic incidents. The aim of this study was to investigate the prevalence of DOAC-treated patients with GIB whose plasma drug concentrations exceeded the cut-off values reported in the literature and to evaluate their clinical characteristics. Materials and Methods: Patients who were admitted to the Intensive Care Unit in the period 2/2020-3/2022 due to GIB were prospectively included in the study and classified into three groups according to the prescribed type of DOAC (apixaban, rivaroxaban, and dabigatran). For all participants, it was determined if the measured plasma drug levels exceeded the maximum serum concentration (Cmax) or trough serum concentration (Ctrough) obtained from the available data. A comparison of clinical parameters between the patients with and without excess drug values was performed. Results: There were 90 patients (54.4% men) included in the study, of whom 27 were treated with dabigatran, 24 with apixaban, and 39 with rivaroxaban. According to Cmax, there were 34 (37.8%), and according to Ctrough, there were 28 (31.1%) patients with excess plasma drug values. A statistically significant difference regarding excess plasma drug values was demonstrated between DOACs according to both Cmax (p = 0.048) and Ctrough (p < 0.001), with the highest rate in the group treated with dabigatran (55.6% for Cmax and 59.3% for Ctrough). Multivariate logistic regression showed that age (OR 1.177, p = 0.049) is a significant positive and glomerular filtration rate (OR 0.909, p = 0.016) is a negative predictive factor for excess plasma drug values. A total of six (6.7%) patients had fatal outcomes. Conclusions: Plasma drug concentrations exceed cut-off values reported in the literature in more than one-third of patients with GIB taking DOAC, with the highest rate in the dabigatran group. Clinicians should be more judicious when prescribing dabigatran to the elderly and patients with renal failure. In these patients, dose adjustment, plasma drug monitoring, or substitution with other, more appropriate DOACs should be considered.
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Affiliation(s)
- Dorotea Bozic
- Department of Gastroenterology, Clinic for Internal Medicine, University Hospital of Split, Spinciceva 1, 21000 Split, Croatia
| | - Damir Alicic
- Department of Gastroenterology, Clinic for Internal Medicine, University Hospital of Split, Spinciceva 1, 21000 Split, Croatia
| | - Dinko Martinovic
- Department of Maxillofacial Surgery, University Hospital of Split, Spinciceva 1, 21000 Split, Croatia
| | - Ivan Zaja
- Department of Gastroenterology, Clinic for Internal Medicine, University Hospital of Split, Spinciceva 1, 21000 Split, Croatia
| | - Josipa Bilandzic-Ivisic
- Department of Gastroenterology, General Hospital of Sibenik-Knin County, Stjepana Radica 83, 22000 Sibenik, Croatia
| | - Rosana Sodan
- Department of Gastroenterology, Clinic for Internal Medicine, University Hospital of Split, Spinciceva 1, 21000 Split, Croatia
| | - Branka Kresic
- Department of Medical Laboratory Diagnostics, University Hospital of Split, Spinciceva 1, 21000 Split, Croatia
| | - Andre Bratanic
- Department of Gastroenterology, Clinic for Internal Medicine, University Hospital of Split, Spinciceva 1, 21000 Split, Croatia
- Department of Internal medicine, University of Split School of Medicine, Soltanska 2, 21000 Split, Croatia
| | - Zeljko Puljiz
- Department of Gastroenterology, Clinic for Internal Medicine, University Hospital of Split, Spinciceva 1, 21000 Split, Croatia
- Department of Internal medicine, University of Split School of Medicine, Soltanska 2, 21000 Split, Croatia
| | - Zarko Ardalic
- Department of Gastroenterology, Clinic for Internal Medicine, University Hospital of Split, Spinciceva 1, 21000 Split, Croatia
| | - Josko Bozic
- Department of Pathophysiology, University of Split School of Medicine, Soltanska 2, 21000 Split, Croatia;
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Hirsh J, de Vries TAC, Eikelboom JW, Bhagirath V, Chan NC. Clinical Studies with Anticoagulants that Have Changed Clinical Practice. Semin Thromb Hemost 2023; 49:242-254. [PMID: 36603813 DOI: 10.1055/s-0042-1760330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Anticoagulant therapy is the cornerstone of treatment and prevention of arterial and venous thromboembolism. Taking a historical perspective, starting in the 1960s, and progressing through to 2022, we discuss key clinical trials of anticoagulants that have changed clinical practice, and examine obstacles encountered in bringing these anticoagulants to the clinic. The design of some of the early studies that shaped clinical practice was poor by current standards, but their results were influential because nothing better was available. Both heparin and vitamin K antagonists had been in clinical use for several decades before well-designed trials in the 1980s optimized their dosing and enhanced their safety and efficacy. Low-molecular-weight heparin then replaced unfractionated heparin because it had a more predictable dose-response and a longer half-life, thereby allowing it to be used conveniently in out-of-hospital settings. More recently, direct oral anticoagulants became the oral anticoagulants of choice for most indications because they were shown to be at least as safe and effective as vitamin K antagonists when used in fixed doses without the need for laboratory monitoring. The design of the trials that led to the approval of the direct oral anticoagulants was excellent, but further studies are required to optimize their dosing in selected patients who were underrepresented in these trials.
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Affiliation(s)
- Jack Hirsh
- Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Tim A C de Vries
- Heart Center, Department of Clinical and Experimental Cardiology and Cardiothoracic Surgery, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.,Heart Failure and Arrhythmias, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands.,Department of Cardiology, Rijnstate Hospital, Arnhem, The Netherlands
| | - John W Eikelboom
- Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada.,Division of Hematology and Thromboembolism, Department of Medicine, Population Health Research Institute, Hamilton, Ontario, Canada.,Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada
| | - Vinai Bhagirath
- Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada.,Division of Hematology and Thromboembolism, Department of Medicine, Population Health Research Institute, Hamilton, Ontario, Canada.,Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada
| | - Noel C Chan
- Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada.,Division of Hematology and Thromboembolism, Department of Medicine, Population Health Research Institute, Hamilton, Ontario, Canada.,Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada
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Thomas A, Fang MC, Kogan S, Hubbard CC, Friedman PN, Gong L, Klein TE, Nutescu EA, O’Brien TJ, Tuck M, Perera MA, Schwartz JB. Apixaban Concentrations in Routine Clinical Care of Older Adults With Nonvalvular Atrial Fibrillation. JACC. ADVANCES 2022; 1:100039. [PMID: 37961076 PMCID: PMC10643025 DOI: 10.1016/j.jacadv.2022.100039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
BACKGROUND Direct-acting oral anticoagulants are first-line agents for prevention of stroke in patients with nonvalvular atrial fibrillation (NVAF), but data are limited for the oldest patients, and with reduced dosing. OBJECTIVES To determine steady-state apixaban peak and trough concentrations during routine care of older adults with NVAF, compare concentrations to clinical trial concentrations, and explore factors associated with concentrations. METHODS A cross-sectional study of medically stable older adults with NVAF (≥75 years or ≥70 years if Black) receiving apixaban. Peak (2-4.4 hours post-dose) and trough (before next dose) concentrations were determined by anti-Xa activity calibrated chromogenic assay. Patient characteristics associated with concentrations were determined by multivariate modeling. RESULTS The median age of patients (n = 115) was 80 (interquartile range: 77-84) years. The cohort comprised 46 women and 69 men; of which 98 are White, 11 Black, and 6 Asian. With 5 mg twice daily per labelling (n = 88), peak concentrations were higher in women: 248 ± 105 vs 174 ± 67 ng/mL in men (P < 0.001) and exceeded expected 95% range in 6 of 30 vs 0 of 55 men (P = 0.002). With 2.5 mg twice daily per label (n = 11), concentrations were <5 mg twice daily (peak: 136 ± 87 vs 201 ± 90 ng/mL, P = 0.026; trough: 65 ± 28 vs 109 ± 56 ng/mL, P < 0.001), but not different than 2.5 mg twice daily without reduction criteria (n = 13; peak: 132 ± 88; trough: 65 ± 31 ng/mL). Covariates associated with concentrations included sex, number of daily medications, and creatinine clearance. CONCLUSIONS Older women had higher than expected peak apixaban concentrations, and 2.5 mg twice daily produced lower concentrations than standard dosing. Factors not currently included in dosing recommendations affected concentrations. The impact of apixaban concentrations on outcomes needs evaluation.
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Affiliation(s)
- Alveena Thomas
- Division of Geriatrics, Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Margaret C. Fang
- Division of Hospital Medicine, Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Scott Kogan
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Colin C. Hubbard
- Division of Hospital Medicine, Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Paula N. Friedman
- Department of Pharmacology, Center for Pharmacogenomics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Li Gong
- Department of Biomedical Data Science, Stanford University, Stanford, California, USA
| | - Teri E. Klein
- Department of Biomedical Data Science and Department of Medicine, Stanford University, Stanford, California, USA
| | - Edith A. Nutescu
- Department of Pharmacy Practice and Center for Pharmacoepidemiology and Pharmacoeconomic Research, College of Pharmacy, University of Illinois Chicago, Chicago, Illinois, USA
| | - Travis J. O’Brien
- Department of Pharmacology and Physiology, School of Medicine and Health Sciences, The George Washington University, Washington, District of Columbia, USA
| | - Matthew Tuck
- Washington DC VA Medical Center, Washington, District of Columbia, USA
- Department of Medicine, The George Washington University, Washington, District of Columbia, USA
| | - Minoli A. Perera
- Department of Pharmacology, Center for Pharmacogenomics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Janice B. Schwartz
- Division of Geriatrics, Department of Medicine, University of California, San Francisco, San Francisco, California, USA
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de Vries TAC, Hirsh J, Chan NC. Letter by de Vries et al Regarding Article "Off-Label Under- and Overdosing of Direct Oral Anticoagulants in Patients With Atrial Fibrillation: A Meta-Analysis". Circ Cardiovasc Qual Outcomes 2022; 15:e008982. [PMID: 35477257 DOI: 10.1161/circoutcomes.122.008982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Tim A C de Vries
- Heart Center, Department of Clinical and Experimental Cardiology and Cardiothoracic Surgery, Amsterdam University Medical Centers, University of Amsterdam, the Netherlands (T.A.C.d.V.).,Amsterdam Cardiovascular Sciences, Heart Failure and Arrhythmias, the Netherlands (T.A.C.d.V.).,Department of Cardiology, Rijnstate Hospital, Arnhem, the Netherlands (T.A.C.d.V.)
| | - Jack Hirsh
- Thrombosis and Atherosclerosis Research Institute, Hamilton, Canada (J.H., N.C.C.).,Department of Medicine, McMaster University, Hamilton, Canada (J.H., N.C.C.)
| | - Noel C Chan
- Thrombosis and Atherosclerosis Research Institute, Hamilton, Canada (J.H., N.C.C.).,Department of Medicine, McMaster University, Hamilton, Canada (J.H., N.C.C.)
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