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Schöchl H, Grottke O, Schmitt FCF. Direct oral anticoagulants in trauma patients. Curr Opin Anaesthesiol 2024; 37:93-100. [PMID: 38390987 DOI: 10.1097/aco.0000000000001356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
PURPOSE OF REVIEW Direct oral anticoagulants (DOACs) are increasingly prescribed for prevention of thromboembolic events. Thus, trauma care providers are facing a steadily raising number of injured patients on DOACs. RECENT FINDINGS Despite a predictable pharmacokinetic profile, the resulting plasma levels of trauma patients upon admission and bleeding risks remain uncertain. Therefore, recent guidelines recommend the measurement of DOAC plasma concentrations in injured patients. Alternatively, DOAC specific visco-elastic tests assays can be applied to identify DOAC patients at bleeding risk.Bleeding complications in trauma patients on DOACs are generally higher compared to nonanticoagulated subjects, but comparable to vitamin K antagonists (VKAs). In particular, a traumatic brain injury does not carry an increased risk of intracranial bleeding due to a DOAK intake compared to VKAs. Current studies demonstrated that up to 14% of patients with a hip fracture are on DOACs prior to surgery. However, the majority can be operated safely within a 24h time window without an increased bleeding rate.Specific antagonists facilitate rapid reversal of patients on DOACs. Idarucizumab for dabigatran, and andexanet alfa for apixaban and rivaroxaban have been approved for life threatening bleeding. Alternatively, prothrombin complex concentrate can be used. Dialysis is a potential treatment option for dabigatran and haemoabsorption with special filters can be applied in patients on FXa-inhibitors. SUMMARY Current guidelines recommend the measurement of DOAC plasma levels in trauma patients. Compared to VKAs, DOACs do not carry a higher bleeding risk. DOAC specific antagonists facilitate the individual bleeding management.
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Affiliation(s)
- Herbert Schöchl
- Ludwig Boltzmann Institute for Traumatology, The research centre in cooperation with AUVA, Vienna, Austria
| | - Oliver Grottke
- Department of Anaesthesiology, RWTH Aachen University Hospital, Aachen
| | - Felix C F Schmitt
- Department of Anaesthesiology, Heidelberg University Hospital, Heidelberg, Germany
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Ruoff C, Schöchl H, Fritsch G, Voelckel W, Zipperle J, Gratz J, Schmitt F, Oberladstätter D. DOAC plasma concentration upon hospital admission in a cohort of trauma patients. An observational real-life study. Eur J Trauma Emerg Surg 2023; 49:2543-2551. [PMID: 37500912 DOI: 10.1007/s00068-023-02334-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 07/15/2023] [Indexed: 07/29/2023]
Abstract
PURPOSE Due to a better safety profile, direct oral anticoagulants (DOACs) are increasingly prescribed for prevention of thromboembolic events. However, little is known about DOAC plasma concentrations in trauma patients upon hospital admission. Thus, we investigated the frequency and extent of DOAC possible over- and underdosing in trauma patients upon hospital admission. METHODS In this single-center retrospective study, DOAC plasma concentrations of adult trauma patients were analyzed with specific calibrated anti-IIa (dabigatran) and anti-Xa (apixaban, edoxaban and rivaroxaban) tests within 4 h after hospital admission. RESULTS A total of 210 trauma patients, admitted between 2019 and 2022, were included in the analyses. Low DOAC levels < 30 ng/mL were detected in 13.3% of the patients. In 7.1% of the patients, DOAC plasma levels ranged between 300-399 ng/mL and further 7.1% exhibited plasma concentrations > 400 ng/mL. The highest incidence of high to very high DOAC plasma concentration was observed for patients on rivaroxaban and dabigatran. A moderate correlation was observed between dabigatran plasma concentration and estimated glomerular filtration rate (rho = - 0.5338, p = 0.0003). For rivaroxaban no clear association between plasma concentration and liver or renal function could be detected. Patients on statins had significantly higher DOAC concentration in comparison with those not taking statins (153 (76-274) vs 108 (51-217) ng/mL, p = 0.046). CONCLUSION The current study revealed that patients on dabigatran and rivaroxaban were prone to higher DOAC plasma levels upon hospital admission in comparison with apixaban and edoxaban. DOAC plasma level measurement in trauma patients might be warranted due to unpredictively low or high plasma concentrations. However, the clinical impact of altered plasma levels on both, bleeding and thromboembolic events, remains to be determined by future studies.
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Affiliation(s)
- Carolin Ruoff
- Department of Anaesthesiology and Intensive Care Medicine, AUVA Trauma Centre Salzburg, Academic Teaching Hospital of the Paracelsus Medical University, Dr. Franz Rehrl Platz 5, 5020, Salzburg, Austria
- Paracelsus Medical University, Salzburg, Austria
| | - Herbert Schöchl
- Department of Anaesthesiology and Intensive Care Medicine, AUVA Trauma Centre Salzburg, Academic Teaching Hospital of the Paracelsus Medical University, Dr. Franz Rehrl Platz 5, 5020, Salzburg, Austria.
- Ludwig Boltzmann Institute for Traumatology, The Research Centre in Cooperation With AUVA, Vienna, Austria.
| | - Gerhard Fritsch
- Department of Anaesthesiology and Intensive Care Medicine, AUVA Trauma Centre Salzburg, Academic Teaching Hospital of the Paracelsus Medical University, Dr. Franz Rehrl Platz 5, 5020, Salzburg, Austria
- Ludwig Boltzmann Institute for Traumatology, The Research Centre in Cooperation With AUVA, Vienna, Austria
| | - Wolfgang Voelckel
- Department of Anaesthesiology and Intensive Care Medicine, AUVA Trauma Centre Salzburg, Academic Teaching Hospital of the Paracelsus Medical University, Dr. Franz Rehrl Platz 5, 5020, Salzburg, Austria
| | - Johannes Zipperle
- Ludwig Boltzmann Institute for Traumatology, The Research Centre in Cooperation With AUVA, Vienna, Austria
| | - Johannes Gratz
- Department of Anaesthesiology, Intensive Care Medicine and Pain Medicine, Medical University of Vienna, Vienna, Austria
| | - Felix Schmitt
- Department of Anaesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Daniel Oberladstätter
- Department of Anaesthesiology and Intensive Care Medicine, AUVA Trauma Centre Salzburg, Academic Teaching Hospital of the Paracelsus Medical University, Dr. Franz Rehrl Platz 5, 5020, Salzburg, Austria
- Ludwig Boltzmann Institute for Traumatology, The Research Centre in Cooperation With AUVA, Vienna, Austria
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Zheng Y, Li S, Liu X, Lip GYH, Guo L, Zhu W. Effect of Oral Anticoagulants in Atrial Fibrillation Patients with Polypharmacy: A Meta-analysis. Thromb Haemost 2023. [PMID: 37399842 DOI: 10.1055/s-0043-1770724] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2023]
Abstract
BACKGROUND The aim of the present meta-analysis was to evaluate the effectiveness and safety of non-vitamin K antagonist oral anticoagulants (NOACs) versus vitamin K antagonists (VKAs) in atrial fibrillation (AF) patients with polypharmacy. METHODS AND RESULTS Randomized controlled trials or observational studies reporting the data of NOACs versus VKAs among AF patients with polypharmacy were included. The search was performed in the PubMed and Embase databases up to November 2022. A total of 12 studies involving 767,544 AF patients were included. For the primary outcomes, the use of NOACs compared with VKAs was significantly associated with a reduced risk of stroke or systemic embolism in AF patients with moderate polypharmacy (hazard ratio [HR]: 0.77 [95% confidence interval [CI]: 0.69-0.86]) and severe polypharmacy (HR: 0.76 [95% CI: 0.69-0.82]), but there was no significant difference in major bleeding (moderate polypharmacy: HR: 0.87 [95% CI: 0.74-1.01]; severe polypharmacy: HR: 0.91 [95% CI: 0.79-1.06]) between the two groups. In secondary outcomes, there were no differences in the rates of ischemic stroke, all-cause death, and gastrointestinal bleeding between the NOAC- and VKA- users, but NOAC users had a reduced risk of any bleeding compared with VKA- users. Compared with VKAs, the risk of intracranial hemorrhage was reduced in NOAC- users with moderate polypharmacy but not severe polypharmacy. CONCLUSION In patients with AF and polypharmacy, NOACs showed advantages over VKAs in stroke or systemic embolism and any bleeding, and were comparable to VKAs for major bleeding, ischemic stroke, all-cause death, intracranial hemorrhage, and gastrointestinal bleeding.
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Affiliation(s)
- Yuxiang Zheng
- Department of Anesthesiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Siyuan Li
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiao Liu
- Department of Cardiology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Gregory Y H Lip
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart and Chest Hospital, Liverpool, United Kingdom
- Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Linjuan Guo
- Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang of Jiangxi, China
| | - Wengen Zhu
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
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Trinks-Roerdink EM, Geersing GJ, Hemels M, van Gelder IC, Klok FA, van Smeden M, Rutten FH, van Doorn S. External validation and updating of prediction models of bleeding risk in patients with cancer receiving anticoagulants. Open Heart 2023; 10:openhrt-2023-002273. [PMID: 37055175 PMCID: PMC10106080 DOI: 10.1136/openhrt-2023-002273] [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] [Received: 02/02/2023] [Accepted: 03/27/2023] [Indexed: 04/15/2023] Open
Abstract
OBJECTIVE Patients with cancer are at increased bleeding risk, and anticoagulants increase this risk even more. Yet, validated bleeding risk models for prediction of bleeding risk in patients with cancer are lacking. The aim of this study is to predict bleeding risk in anticoagulated patients with cancer. METHODS We performed a study using the routine healthcare database of the Julius General Practitioners' Network. Five bleeding risk models were selected for external validation. Patients with a new cancer episode during anticoagulant treatment or those initiating anticoagulation during active cancer were included. The outcome was the composite of major bleeding and clinically relevant non-major (CRNM) bleeding. Next, we internally validated an updated bleeding risk model accounting for the competing risk of death. RESULTS The validation cohort consisted of 1304 patients with cancer, mean age 74.0±10.9 years, 52.2% males. In total 215 (16.5%) patients developed a first major or CRNM bleeding during a mean follow-up of 1.5 years (incidence rate; 11.0 per 100 person-years (95% CI 9.6 to 12.5)). The c-statistics of all selected bleeding risk models were low, around 0.56. Internal validation of an updated model accounting for death as competing risk showed a slightly improved c-statistic of 0.61 (95% CI 0.54 to 0.70). On updating, only age and a history of bleeding appeared to contribute to the prediction of bleeding risk. CONCLUSIONS Existing bleeding risk models cannot accurately differentiate bleeding risk between patients. Future studies may use our updated model as a starting point for further development of bleeding risk models in patients with cancer.
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Affiliation(s)
- E M Trinks-Roerdink
- Department of General Practice & Nursing Science, Julius Centre for Health Sciences and Primary Care, UMCU, Utrecht, The Netherlands
| | - G J Geersing
- Department of General Practice & Nursing Science, Julius Centre for Health Sciences and Primary Care, UMCU, Utrecht, The Netherlands
| | - Mew Hemels
- Department of Cardiology, Rijnstate Hospital, Arnhem, The Netherlands
- Department of Cardiology, Radboudumc, Nijmegen, The Netherlands
| | - I C van Gelder
- Department of Cardiology, UMCG, Groningen, The Netherlands
| | - F A Klok
- Department of Medicine - Thrombosis and Haemostasis, LUMC, Leiden, The Netherlands
| | - M van Smeden
- Department of Epidemiology & Health Economics, Julius Centre for Health Sciences and Primary Care, UMCU, Utrecht, The Netherlands
| | - F H Rutten
- Department of General Practice & Nursing Science, Julius Centre for Health Sciences and Primary Care, UMCU, Utrecht, The Netherlands
| | - S van Doorn
- Department of General Practice & Nursing Science, Julius Centre for Health Sciences and Primary Care, UMCU, Utrecht, The Netherlands
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Stöllberger C, Schneider B, Finsterer J. Drug-drug interactions with direct oral anticoagulants for the prevention of ischemic stroke and embolism in atrial fibrillation: a narrative review of adverse events. Expert Rev Clin Pharmacol 2023; 16:313-328. [PMID: 36861431 DOI: 10.1080/17512433.2023.2187376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
INTRODUCTION In randomized trials, direct oral anticoagulants (DOAC) were non-inferior to the vitamin-K-antagonist (VKA) warfarin in preventing stroke/embolism in patients with atrial fibrillation (AF). DOAC are substrates for P-glycoprotein (P-gp), CYP3A4 and CYP2C9. The activity of these enzymes is modulated by several drugs which might induce pharmacokinetic drug-drug interactions (DDI). Drugs affecting platelet function have the potential for pharmacodynamic DDI of DOAC. AREAS COVERED The literature was searched for: 'dabigatran,' 'rivaroxaban,' 'edoxaban,' or 'apixaban' and drugs affecting platelet function, CYP3A4-, CYP2C9- or P-gp-activity. Reports about bleeding and embolic events attributed to DDI with DOAC in AF-patients were found for 43 of 171 drugs with interacting potential (25%), most frequently with antiplatelet and nonsteroidal anti-inflammatory drugs. Whereas a co-medication of platelet-affecting drugs is invariably reported to increase the bleeding risk, the findings regarding P-gp-, CYP3A4- and CYP2C9- activity-affecting drugs are ambiguous. EXPERT OPINION Tests for plasma DOAC-levels and information about DDI of DOAC should be widely available and user-friendly. If advantages and disadvantages of DOAC and VKA can be investigated exhaustively, individualized anticoagulant therapy can be offered to patients, considering co-medication, comorbidities, genetic and geographic factors and the health care system.
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Honda T, Abe K, Oda M, Harada F, Maruyama K, Aoyagi H, Miura R, Konno K, Arizumi T, Asaoka Y, Kodashima S, Kozuma K, Yamamoto T, Tanaka A. Gastrointestinal bleeding during direct oral anticoagulants therapy in patients with nonvalvular atrial fibrillation and risk of polypharmacy. J Clin Pharmacol 2022; 62:1548-1556. [PMID: 35699131 DOI: 10.1002/jcph.2106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/03/2022] [Indexed: 11/06/2022]
Abstract
Although concomitant medications have been raised as a factor affecting hemorrhage during direct oral anticoagulants (DOACs) therapy, details remain unelucidated. This study was conducted to clarify the relationship between concomitant medications with possible pharmacokinetic interactions and number of concomitant medications, and bleeding and embolism in patients with nonvalvular atrial fibrillation on DOACs. The subjects were 1,010 patients prescribed DOACs from a single-center at the Teikyo University Hospital between April 2011 and June 2018. This study was an exploratory analysis and investigated their course between the first prescription and December 2018, including the presence or absence of clinically relevant bleeding, gastrointestinal bleeding, and major cardiovascular and cerebrovascular events. Impacts of medications were evaluated by the general linear model with inverse probability-weighted propensity score. The observation period was 2,272 patient-years. The rate of bleeding was 4.7%/year, gastrointestinal bleeding was 2.8%/year, and major cardiovascular and cerebrovascular events was 2.0%/year. Taking 10 or more oral medications concurrently was a significant risk for gastrointestinal bleeding (hazard ratio, 2.046 [1.188-3.526]; p = 0.010). Nonsteroidal anti-inflammatory drugs (NSAIDs) were the only significant risk for gastrointestinal bleeding. Clinicians should be aware of gastrointestinal bleeding when using DOACs with patients taking more than 10 medications and/or NSAIDs. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Taku Honda
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Koichiro Abe
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Minoru Oda
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Fumito Harada
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Kyohei Maruyama
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Hitoshi Aoyagi
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Ryo Miura
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Kumiko Konno
- Division of Cardiology, Department of Medicine, Teikyo University school of Medicine
| | - Toshihiko Arizumi
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Yoshinari Asaoka
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Shinya Kodashima
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Ken Kozuma
- Division of Cardiology, Department of Medicine, Teikyo University school of Medicine
| | - Takatsugu Yamamoto
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
| | - Atsushi Tanaka
- Division of Gastroenterology, Department of Medicine, Teikyo University School of Medicine
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Escobar C, Barrios V, Lip GYH, Amin AN, Auladell-Rispau A, Santero M, Salazar J, Requeijo C. Effectiveness and Safety of Dabigatran Compared to Vitamin K Antagonists in Non-Asian Patients with Atrial Fibrillation: A Systematic Review and Meta-Analysis. Clin Drug Investig 2021; 41:941-953. [PMID: 34643934 DOI: 10.1007/s40261-021-01091-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND AND OBJECTIVE Real-life data about the use of dabigatran in patients with non-valvular atrial fibrillation are warranted. The objective of this systematic review and meta-analysis was to assess the effectiveness and safety of dabigatran, globally and stratified by dose (110/150 mg twice daily), vs vitamin K antagonists in non-Asian patients with non-valvular atrial fibrillation from "real-world" studies. METHODS A systematic review was performed according to Cochrane methodological standards. The results were reported according to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-analyses Statement) statement. The ROBINS-I tool was used to assess bias risk. MEDLINE and EMBASE, from inception up to May 2021, using appropriate controlled vocabulary and free search terms, were searched. RESULTS: A total of 34 studies, corresponding to 37 articles involving 1,600,722 participants (1,154,283 exposed to vitamin K antagonists and 446,439 to dabigatran) were eligible for this review. Dabigatran 150 mg reduced the risk of ischemic stroke compared with vitamin K antagonists, with a 14% risk reduction (hazard ratio [HR] 0.86, 95% confidence interval [CI] 0.74-0.98). Globally, dabigatran reduced the risk of all-cause mortality compared with vitamin K antagonists (HR 0.76, 95% CI 0.69-0.84), with a greater effect observed with dabigatran 150 mg (HR 0.65, 95% CI 0.58-0.73). There was a trend towards a lower risk of myocardial infarction with dabigatran 150 mg (HR 0.86, 95% CI 0.71-1.04). Regarding the primary safety outcomes, dabigatran (either at a dose of 150 mg or 110 mg) reduced the risk of major bleeding compared with vitamin K antagonists (HR 0.77, 95% CI 0.70-0.83), as well as the risk of intracranial bleeding (HR 0.44, 95% CI 0.39-0.50) and fatal bleeding (HR 0.76, 95% CI 0.60-0.95), but with a slight increase in gastrointestinal bleeding risk (HR 1.16, 95% CI 1.08-1.26). CONCLUSIONS Dabigatran has a favorable impact on effectiveness and safety outcomes compared with vitamin K antagonists in real-world populations.
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Affiliation(s)
- Carlos Escobar
- Servicio de Cardiología, Hospital Universitario La Paz, Paseo de la Castellana 261, 28046, Madrid, Spain.
| | - Vivencio Barrios
- Servicio de Cardiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Gregory Y H Lip
- University of Liverpool and Liverpool Heart and Chest, Liverpool, UK
| | - Alpesh N Amin
- Department of Medicine, School of Medicine, University of California Irvine, Irvine, CA, USA
| | - Ariadna Auladell-Rispau
- Grup de Recerca d'Epidemiologia Clínica i Serveis Sanitaris, Institut d'Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain
| | - Marilina Santero
- Grup de Recerca d'Epidemiologia Clínica i Serveis Sanitaris, Institut d'Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain
| | - Josefina Salazar
- Grup de Recerca d'Epidemiologia Clínica i Serveis Sanitaris, Institut d'Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain
| | - Carolina Requeijo
- Grup de Recerca d'Epidemiologia Clínica i Serveis Sanitaris, Institut d'Investigació Biomèdica Sant Pau (IIB Sant Pau), Barcelona, Spain
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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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