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Montelione N, Loreni F, Nenna A, Catanese V, Scurto L, Ferrisi C, Jawabra M, Gabellini T, Codispoti FA, Spinelli F, Chello M, Stilo F. Tissue Engineering and Targeted Drug Delivery in Cardiovascular Disease: The Role of Polymer Nanocarrier for Statin Therapy. Biomedicines 2023; 11:798. [PMID: 36979777 PMCID: PMC10045667 DOI: 10.3390/biomedicines11030798] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/21/2023] [Accepted: 02/24/2023] [Indexed: 03/09/2023] Open
Abstract
Atherosclerosis-related coronary artery disease (CAD) is the leading cause of mortality and morbidity worldwide. This requires effective primary and secondary prevention in reducing the complications related to CAD; the regression or stabilization of the pathology remains the mainstay of treatment. Statins have proved to be the most effective treatment in reducing adverse effects, but there are limitations related to the administration and achievement of effective doses as well as side effects due to the lack of target-related molecular specificity. The implemented technological steps are polymers and nanoparticles for the administration of statins, as it has been seen how the conjugation of drug delivery systems (DDSs) with statins increases bioavailability by circumventing the hepatic-renal filter and increases the related target specificity, enhancing their action and decreasing side effects. Reduction of endothelial dysfunction, reduced intimal hyperplasia, reduced ischemia-reperfusion injury, cardiac regeneration, positive remodeling in the extracellular matrix, reduced neointimal growth, and increased reendothelialization are all drug-related effects of statins enhanced by binding with DDSs. Recent preclinical studies demonstrate how the effect of statins stimulates the differentiation of endogenous cardiac stem cells. Poly-lactic-co-glycolic acid (PLGA) seems to be the most promising DDS as it succeeds more than the others in enhancing the effect of the bound drug. This review intends to summarize the current evidence on polymers and nanoparticles for statin delivery in the field of cardiovascular disease, trying to shed light on this topic and identify new avenues for future studies.
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Affiliation(s)
- Nunzio Montelione
- Unit of Vascular Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Francesco Loreni
- Unit of Cardiac Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Antonio Nenna
- Unit of Cardiac Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Vincenzo Catanese
- Unit of Vascular Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Lucia Scurto
- Unit of Vascular Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Chiara Ferrisi
- Unit of Cardiac Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Mohamad Jawabra
- Unit of Cardiac Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Teresa Gabellini
- Residency Program of Vascular and Endovascular Surgery, University of Ferrara, 44121 Ferrara, Italy
| | | | - Francesco Spinelli
- Unit of Vascular Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Massimo Chello
- Unit of Cardiac Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Francesco Stilo
- Unit of Vascular Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
- Head of Research Unit of Vascular Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
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Gao W, Li Z, Chen W, Zhang S. Performance Evaluation of Warfarin Dose Prediction Algorithms and Effects of Clinical Factors on Warfarin Dose in Chinese Patients. Ther Drug Monit 2021; 43:527-535. [PMID: 34250965 DOI: 10.1097/ftd.0000000000000880] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 02/06/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND The clinical utility of warfarin dose prediction algorithms remains controversial, our purpose is to evaluate the performance of warfarin dose prediction algorithms and the effects of clinical factors on warfarin dose in Chinese patients. METHODS Clinical data of 217 patients who received warfarin treatment were used to assess 6 warfarin dose prediction algorithms (OHNO, IWPC [International Warfarin Pharmacogenetics Consortium], HUANG, KIM, BRESS, and MIAO). The predicted dose (PD) was compared with the warfarin optimal dose (WOD, defined as the dose that maintains the international normalized ratio within the target range of 2.0-3.0). A multiple regression analysis with WOD as the dependent variable was performed to evaluate the effects of clinical factors on warfarin dose. RESULTS The mean absolute error analysis ranked the predictive accuracies of the algorithms as OHNO > IWPC > HUANG > KIM > BRESS > MIAO. Stratified analysis indicated that HUANG most accurately predicted that patients required lower WODs (≤3 mg/d), whereas OHNO was the most effective in predicting medium WODs (3-5 mg/d). KIM was effective in predicting high WODs (>5 mg/d). Multiple linear regression analysis showed that VKORC1 (rs9923231) and body mass index were significantly positively correlated with WOD, whereas concurrent atrial fibrillation status, CYP2C9*3 (rs1057910), and sex were significantly negatively correlated with WOD. CONCLUSIONS In Chinese patients, OHNO should be given priority during the prediction and selection of warfarin dose. When using OHNO to predict warfarin dose (≤3 mg/d or >5 mg/d), HUANG or KIM algorithms can provide precise predictions. At the same time, physicians should pay close attention to clinical factors, such as VKORC1 (rs9923231), concurrent atrial fibrillation status, CYP2C9*3 (rs1057910), body mass index, and sex, to improve warfarin dose adjustment strategies in Chinese patients.
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Affiliation(s)
- Weiqi Gao
- School of Pharmacy, Shanxi Medical University, Taiyuan, China; and
- Department of Pharmacy, Shanxi Bethune Hospital, Third Hospital of Shanxi Medical University, Shanxi Academy of Medical Sciences, Taiyuan, China
| | - Zhihong Li
- Department of Pharmacy, Shanxi Bethune Hospital, Third Hospital of Shanxi Medical University, Shanxi Academy of Medical Sciences, Taiyuan, China
| | - Weihong Chen
- Department of Pharmacy, Shanxi Bethune Hospital, Third Hospital of Shanxi Medical University, Shanxi Academy of Medical Sciences, Taiyuan, China
| | - Shuqiu Zhang
- School of Pharmacy, Shanxi Medical University, Taiyuan, China; and
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Bernaitis N, Badrick T, Anoopkumar-Dukie S. Comparison of potential pharmacokinetic drug interactions in patients with atrial fibrillation and changing from warfarin to non-vitamin K oral anticoagulant therapy. J Thromb Thrombolysis 2021; 52:1110-1116. [PMID: 33963483 DOI: 10.1007/s11239-021-02466-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/26/2021] [Indexed: 12/21/2022]
Abstract
There are now anticoagulant choices with proposed advantages of non-vitamin K oral anticoagulants (NOACs) over warfarin being less routine monitoring and less drug interactions. Interacting medication can impact the efficacy and safety of anticoagulant therapy with management remaining clinically challenging. There have been limited studies comparing the potential for pharmacokinetic (PK) drug interactions between different anticoagulants. Therefore, the aim of this study was to compare potential PK interactions in patients with atrial fibrillation (AF) changing from warfarin to NOAC therapy. A retrospective analysis was conducted of patients with AF enrolled in a dedicated warfarin program but exiting this program to commence a NOAC. Patient data was collected, and concurrent medications were utilised to identify potential PK drug interactions with both warfarin and the chosen NOAC therapy. Patients were grouped according to the number of medications with potential PK interactions and comparisons made between groups. Of the 712 eligible patients who ceased warfarin to commence a NOAC, most commenced either apixaban (45.9%) or rivaroxaban (41.9%). When comparing warfarin to NOACs, there were significant differences in the proportion of patients taking no medication with potential PK drug interactions (46.9% vs 62.8%, p < 0.0001), and taking one (35.2% vs 28.5%, p = 0.0067) and two (14.5% vs 7.3%, p < 0.0001) potentially PK interacting medications. This study found when patients with AF were switched from warfarin to a NOAC, the potential for PK drug interactions significantly reduced but remained around 40%. Identifying and managing potential PK drug interactions with NOACs remains a priority to optimise clinical benefit of these anticoagulants.
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Affiliation(s)
- Nijole Bernaitis
- School of Pharmacy & Pharmacology, Griffith University, Gold Coast Campus, Southport, QLD, 4222, Australia.
| | - Tony Badrick
- The Royal College of Pathologists of Australasia (RCPA) Quality Assurance Programs, St Leonards, NSW, Australia
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Hauta-Aho M, Teperi S, Korhonen MJ, Bell JS, Farinola N, Johns S, Shakib S, Huupponen R. Frailty and Co-Prescribing of Potentially Interacting Drugs in New Users of Warfarin. Drugs Aging 2020; 37:373-382. [PMID: 32147805 PMCID: PMC7190596 DOI: 10.1007/s40266-020-00755-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Warfarin is underutilised in frail older people because of the fear of bleeding complications. Drug interactions are an independent bleeding risk factor. However, the extent to which potential drug interactions are taken into account at warfarin therapy initiation in frail patients is not known. Objective The objective of this study was to investigate the use of potentially interacting drugs increasing the bleeding risk before and after warfarin initiation in frail and non-frail patients. Methods We conducted an observational study including inpatients aged ≥ 60 years initiated on warfarin in a tertiary hospital in Adelaide, South Australia. Frailty status was assessed with the Reported Edmonton Frail Scale. Medication charts were reviewed before and after warfarin initiation. Results In total, 151 patients (102 non-frail and 49 frail) were included. Before warfarin initiation, the use of clopidogrel and acetaminophen was more common in frail patients compared with non-frail patients (25.5% vs 10.2%, p = 0.0135, 63.8% vs 35.7% p = 0.0014, respectively). The use of non-steroidal anti-inflammatory drugs, 9.2% in non-frail patients and 6.4% in frail patients before warfarin initiation, was completely stopped after warfarin initiation in both groups. The use of antiplatelet drugs decreased from 56.1% in non-frail patients and 66.0 % in frail patients to 12.2% and 14.9%, respectively. Instead, the use of drugs affecting the metabolism of warfarin or vitamin K increased in both groups. No statistically significant difference was seen in the exposure to interacting drugs between study groups after warfarin initiation. Acetaminophen, senna glycosides and cytochrome P450 2C9 inhibiting drugs were the most common interacting drugs at discharge used in 49.0%, 18.4% and 20.4% of non-frail patients and 53.2%, 29.8% and 19.1% of frail patients, respectively. Conclusions The overall frequency of potential drug interactions was moderate and frail patients were not exposed to warfarin drug interactions more often than non-frail patients. Further studies in larger study populations are required to verify these results. Electronic supplementary material The online version of this article (10.1007/s40266-020-00755-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Milka Hauta-Aho
- Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, Kiinamyllynkatu 10, 20014, Turku, Finland. .,Clinical Pharmacology Unit, Turku University Hospital, Turku, Finland. .,Department of Clinical Pharmacology, Royal Adelaide Hospital, Adelaide, SA, Australia.
| | - Simo Teperi
- Department of Biostatistics, University of Turku, Turku, Finland
| | - Maarit J Korhonen
- Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, Kiinamyllynkatu 10, 20014, Turku, Finland.,Faculty of Pharmacy and Pharmaceutical Sciences, Centre for Medicine Use and Safety, Monash University, Melbourne, VIC, Australia
| | - J Simon Bell
- Faculty of Pharmacy and Pharmaceutical Sciences, Centre for Medicine Use and Safety, Monash University, Melbourne, VIC, Australia.,NHMRC Centre of Research Excellence in Frailty and Healthy Ageing, Adelaide, SA, Australia
| | - Nicholas Farinola
- Department of Clinical Pharmacology, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Sally Johns
- Department of Clinical Pharmacology, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Sepehr Shakib
- Department of Clinical Pharmacology, Royal Adelaide Hospital, Adelaide, SA, Australia.,Department of Clinical Pharmacology, Faculty of Health Science, University of Adelaide, Adelaide, SA, Australia
| | - Risto Huupponen
- Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, Kiinamyllynkatu 10, 20014, Turku, Finland.,Clinical Pharmacology Unit, Turku University Hospital, Turku, Finland
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The Risk of Drug-Drug Interactions with Paracetamol in a Population of Hospitalized Geriatric Patients. JOURNAL OF PHARMACEUTICS 2020; 2020:1354209. [PMID: 32099714 PMCID: PMC6995317 DOI: 10.1155/2020/1354209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/04/2019] [Accepted: 10/08/2019] [Indexed: 11/17/2022]
Abstract
Aims This study investigates the consumption of paracetamol and the risk of potential drug-drug interactions and assesses the clinical impact hereof in patients admitted to a department of geriatric medicine. Methods A retrospective and longitudinal study was conducted in patients who had been receiving paracetamol upon or during hospitalization. The hospital files of the included patients were reviewed, including documentation of concomitant medications, diagnoses, biochemical values, and adverse incidents during admission. These parameters were used as a clinical follow-up when assessing a clinical probability impact of the identified drug-drug interactions. Results In total, 104 patients were admitted during the study period. 91 (87.5%) of these (mean age 86 years) received a prescription or were treated with paracetamol. Of these, 10% were evaluated as being at risk of potential drug-drug interactions with paracetamol. Seven of the potential drug-drug interactions were related to treatments with warfarin, one with valsartan and one with phenytoin. Of the nine patients at risk, six did experience either abnormal biochemical values or potential related clinical incidents. Four patients experienced increased INR (range 3.2–4.6), of which one patient suffered from anaemia and one with hematemesis. Two patients experienced increased ALAT/ASAT (55/42 U/I and 87/51 U/I, both females). One experienced hypertension. Conclusion A large majority of the patients in this study received treatment with paracetamol. Six patients were evaluated as having abnormal biochemical values or were experiencing clinical incidents during their hospitalization potentially related to the identified potential drug-drug interactions.
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Takeuchi M, Nakano S, Tanaka-Mizuno S, Nishiyama C, Doi Y, Arai M, Fujii Y, Matsunaga T, Kawakami K. Adherence and Concomitant Medication Use among Patients on Warfarin Therapy: Insight from a Large Pharmacy Dispensing Database in Japan. Biol Pharm Bull 2019; 42:389-393. [PMID: 30828071 DOI: 10.1248/bpb.b18-00576] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Warfarin is a drug used for anticoagulation management, with a narrow therapeutic range and multiple drug-drug interactions. Adherence and proper use of concomitant medication are thus fundamental to the efficacy and safety of warfarin therapy. In 2012, we retrospectively analyzed data from three large-scale pharmacy chains in Japan. We included all adults (≥ 20 years old) with at least one record of warfarin dispensation. We examined patient demographic data, adherence as measured by medication possession ratio (MPR), and co-dispensation focusing on the number of concomitant dispensations and concurrent use of medications that increase bleeding risk. Thresholds of underadherence and overadherence were set at <0.9 and >1.1, considering the narrow therapeutic window. We reviewed 443007 warfarin dispensation records of 71340 individuals (median age, 73 years; 62% male). The MPR was 1.0 (interquartile range: 0.96-1.0), and underadherence and overadherence was found in 16.3 and 1.9% of individuals, respectively. The median number of co-dispensed drugs was eight at each pharmacy encounter, which did not differ by age group. Drugs associated with a high bleeding risk were dispensed in 40.0% of encounters and accounted for 16.4% of all co-dispensed drugs. In summary, we found optimal overall adherence, as assessed by MPR, among our Japanese study population, even when defining a strict cut-off value. However, polypharmacy was common in all age groups and medications with a high bleeding risk profile were often co-dispensed with warfarin. Future research addressing how these dispensation patterns affect patient outcome is warranted.
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Affiliation(s)
- Masato Takeuchi
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University
| | - Sayuri Nakano
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University
| | - Sachiko Tanaka-Mizuno
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University.,Department of Medical Statistics, Shiga University of Medical Science
| | - Chika Nishiyama
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University.,Department of Critical Care Nursing, Graduate School of Human Health Science, Kyoto University
| | | | | | | | | | - Koji Kawakami
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University
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Kamuren Z, Kigen G, Keter A, Maritim A. Characteristics of patients with thromboembolic disorders on warfarin therapy in resource limited settings. BMC Health Serv Res 2018; 18:723. [PMID: 30231891 PMCID: PMC6145184 DOI: 10.1186/s12913-018-3537-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 09/12/2018] [Indexed: 11/28/2022] Open
Abstract
Background Warfarin is a drug with narrow therapeutic index used in the management of thromboembolic disorders. Several factors affect its plasma concentrations with a resultant risk of toxicity. We examined the database of patients on warfarin therapy in order to establish the factors that affect the stability of INR and correlated them to clinical outcomes in resource limited settings. Methods We analysed retrospective data of patients admitted to adult medical wards at Moi Teaching and Referral Hospital (MTRH) in 2015. Inclusion criteria were patients with thromboembolic and related disorders and on warfarin treatment. Derived data included demographics, indications for warfarin use, co-prescribed drugs, co-morbidities, INR measurements, duration of hospital stay and clinical outcomes. Descriptive statistics were used to summarize the data. Pearson’s correlation coefficient was used to assess relationships between duration of hospitalization and number of INR tests. Regression splines were used to capture INR trends during the follow up period. Data was analysed using R v. 3.3.1. Results A total of 310 patients had thromboembolic disorders, out of which 63 met the study criteria. The median age was 48 years, while the mean number of INR measurements was once every four days. Majority of patients did not achieve stable INR values, with only two having consecutive INR values within therapeutic goal. Patients who died had high INR levels. The median duration of hospital stay was 9 days (IQR: 7.0, 16.5). There was a significant correlation between length of stay in hospital and the number of times that INR were measured (Corr = 0.667, p < 0.001). The two most common indications for warfarin were DVT (64.4%) and atrial fibrillation (24.7%). All the patients had one or more comorbid conditions except for 11 with DVT alone, with cardiovascular diseases and infections being the most frequent, and on concomitant medications, majority of which are known to interact with warfarin. Conclusions It was difficult to achieve stable INR under the prevailing conditions despite the frequent tests. The potential factors that may have contributed to the fluctuations include drug-drug interactions, frequency of INR tests, comorbidities and the short duration of hospital stay.
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Affiliation(s)
- Zipporah Kamuren
- Department of Pharmacology and Toxicology, Moi University School of Medicine, P.O. Box 4606, Eldoret, 30100, Kenya.
| | - Gabriel Kigen
- Department of Pharmacology and Toxicology, Moi University School of Medicine, P.O. Box 4606, Eldoret, 30100, Kenya
| | - Alfred Keter
- Academic Model Providing Access to Healthcare, P.O. Box 4606, Eldoret, 30100, Kenya
| | - Alice Maritim
- Department of Pharmacology and Toxicology, Moi University School of Medicine, P.O. Box 4606, Eldoret, 30100, Kenya
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Long-Term Statin Administration Does Not Affect Warfarin Time in Therapeutic Range in Australia or Singapore. J Clin Med 2018; 7:jcm7050097. [PMID: 29723987 PMCID: PMC5977136 DOI: 10.3390/jcm7050097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 04/24/2018] [Accepted: 04/26/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Warfarin requires ongoing monitoring of the International Normalised Ratio (INR). This is because numerous factors influence the response, including drug interactions with commonly-prescribed medications, such as statins. The administration of statins with warfarin may change INR; however, there is limited information regarding the effects on warfarin control as measured by time in therapeutic range (TTR). Statins may also alter bleeds with warfarin, but there are conflicting reports demonstrating both increased and decreased bleeds, and limited data on diverse ethnic populations. Therefore, the aim of this study was to determine the effect of statin administration on warfarin control and bleeds in patients in Australia and Singapore. METHODS Retrospective data were collected for patients on warfarin between January and June 2014 in Australia and Singapore. Patient data were used to calculate TTR and bleed events. Concurrent statin therapy was assessed and comparisons of TTR and bleed incidence were made across patient subgroups. RESULTS Warfarin control in Australia and Singapore was not significantly affected by statins, as measured by TTR (83% and 58%, respectively), frequency of testing, and warfarin doses. In Australia, statin use did not significantly affect bleeds, whilst in Singapore the bleed incidence was significantly lower for patients on statins. CONCLUSIONS Chronic concurrent administration of statins with warfarin does not adversely affect warfarin TTR in Australia or Singapore. In Singapore, patients on statins, compared to no statins, had a lower bleed incidence and this requires further investigation, especially given the potential genetic influences of ethnicity on both statin and warfarin metabolism.
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Korhonen MJ, Tiittanen P, Kastarinen H, Helin-Salmivaara A, Hauta-aho M, Rikala M, Huupponen R. Statins do not Increase the Rate of Bleeding Among Warfarin Users. Basic Clin Pharmacol Toxicol 2018; 123:195-201. [DOI: 10.1111/bcpt.12998] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 02/15/2018] [Indexed: 01/03/2023]
Affiliation(s)
- Maarit Jaana Korhonen
- Institute of Biomedicine; University of Turku; Turku Finland
- Centre for Medicine Use and Safety; Faculty of Pharmacy and Pharmaceutical Sciences; Monash University; Melbourne VIC Australia
| | - Pekka Tiittanen
- Institute of Biomedicine; University of Turku; Turku Finland
- National Institute of Health and Welfare, Environmental Unit; Kuopio Finland
| | - Helena Kastarinen
- Institute of Biomedicine; University of Turku; Turku Finland
- Social Insurance Institution; Regional Office for Eastern Finland; Kuopio Finland
| | - Arja Helin-Salmivaara
- Institute of Biomedicine; University of Turku; Turku Finland
- Unit of Primary Health Care; Hospital District of Helsinki and Uusimaa; Helsinki Finland
| | - Milka Hauta-aho
- Institute of Biomedicine; University of Turku; Turku Finland
- Clinical Pharmacology Unit; Turku University Hospital; Turku Finland
| | - Maria Rikala
- Institute of Biomedicine; University of Turku; Turku Finland
| | - Risto Huupponen
- Institute of Biomedicine; University of Turku; Turku Finland
- Clinical Pharmacology Unit; Turku University Hospital; Turku Finland
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Bernaitis N, Ching CK, Teo SC, Chen L, Badrick T, Davey AK, Crilly J, Anoopkumar-Dukie S. Factors influencing warfarin control in Australia and Singapore. Thromb Res 2017; 157:120-125. [PMID: 28738273 DOI: 10.1016/j.thromres.2017.07.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 06/22/2017] [Accepted: 07/10/2017] [Indexed: 12/28/2022]
Abstract
INTRODUCTION Warfarin is widely used for patients with non-valvular atrial fibrillation (NVAF). Variations in warfarin control, as measured by time in therapeutic range (TTR), have been reported across different regions and ethnicities, particularly between Western and Asian countries. However, there is limited data on comparative factors influencing warfarin control in Caucasian and Asian patients. Therefore, the aim of this study was to determine warfarin control and potential factors influencing this in patients with NVAF in Australia and Singapore. METHODS Retrospective data was collected for patients receiving warfarin for January to June 2014 in Australia and Singapore. TTR was calculated for individuals with mean patient TTR used for analysis. Possible influential factors on TTR were analysed including age, gender, concurrent co-morbidities, and concurrent medication. RESULTS The mean TTR was significantly higher in Australia (82%) than Singapore (58%). At both sites, chronic kidney disease significantly lowered this TTR. Further factors influencing control were anaemia and age<60years in Australia, and vascular disease, CHA2DS2-VASc score of 6, and concurrent platelet inhibitor therapy in Singapore. DISCUSSION Warfarin control was significantly higher in Australia compared to Singapore, however chronic kidney disease reduced control at both sites. The different levels of control in these two countries, together with patient factors further reducing control may impact on anticoagulant choice in these countries with better outcomes from warfarin in Australia compared to Singapore.
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Affiliation(s)
- Nijole Bernaitis
- Menzies Health Institute and Quality Use of Medicines Network, Queensland, Griffith University, Queensland, Australia; School of Pharmacy, Griffith University, Queensland, Australia
| | - Chi Keong Ching
- Cardiology Department, National Heart Centre Singapore, Singapore
| | - Siew Chong Teo
- Pharmacy Department, National Heart Centre Singapore, Singapore
| | - Liping Chen
- Pharmacy Department, National Heart Centre Singapore, Singapore
| | - Tony Badrick
- RCPA Quality Assurance Programs, New South Wales, Australia
| | - Andrew K Davey
- Menzies Health Institute and Quality Use of Medicines Network, Queensland, Griffith University, Queensland, Australia; School of Pharmacy, Griffith University, Queensland, Australia
| | - Julia Crilly
- Menzies Health Institute and Quality Use of Medicines Network, Queensland, Griffith University, Queensland, Australia; Department of Emergency Medicine Gold Coast Health, Queensland, Australia
| | - Shailendra Anoopkumar-Dukie
- Menzies Health Institute and Quality Use of Medicines Network, Queensland, Griffith University, Queensland, Australia; School of Pharmacy, Griffith University, Queensland, Australia.
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Ceballos M, González CA, Holguín HA, Amariles P. Relevancia clínica de la interacción de la warfarina y del acetaminofén: estudio de cohortes retrospectivo. REVISTA COLOMBIANA DE CARDIOLOGÍA 2016. [DOI: 10.1016/j.rccar.2015.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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12
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Study of warfarin utilization in hospitalized patients: analysis of possible drug interactions. Int J Clin Pharm 2016; 38:1048-51. [DOI: 10.1007/s11096-016-0336-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 06/15/2016] [Indexed: 10/21/2022]
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Rikala M, Kastarinen H, Tiittanen P, Huupponen R, Korhonen MJ. Natural history of bleeding and characteristics of early bleeders among warfarin initiators - a cohort study in Finland. Clin Epidemiol 2016; 8:23-35. [PMID: 26917975 PMCID: PMC4751892 DOI: 10.2147/clep.s91379] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Aims The demand for oral anticoagulant therapy will continue to increase in the future along with the aging of the population. This study aimed to determine the rate of bleeding requiring hospitalization and to characterize early bleeders among persons initiating warfarin therapy. Characterization of those most susceptible to early bleeding is important in order to increase the safety of warfarin initiation. Patients and methods Using data from nationwide health registers, we identified persons initiating warfarin therapy between January 1, 2009 and June 30, 2012, n=101,588, and followed them until hospitalization for bleeding, death, or administrative end of the study (December 31, 2012). We defined early bleeders as persons with a bleeding requiring hospitalization within 30 days since warfarin initiation. Results The rate of hospitalization for bleeding during a median follow-up of 1.9 years was 2.6% per person-year (95% confidence interval [CI] 2.5%–2.7%), with a peak within the first 30 days of warfarin initiation (6.5% per person-year, 95% CI 6.0%–7.1%). In a multivariable Cox proportional hazards regression analysis, early bleeders were characterized by prior bleeding (<180 days before initiation, hazard ratio [HR] =13.7, 95% CI 10.9–17.1; during 180 days–7 years before initiation, HR =1.48, 95% CI 1.15–1.90), male sex (HR =1.32, 95% CI 1.10–1.57), older age (HR =1.13, 95% CI 1.04–1.22, per 10-year increase), venous thrombosis (HR =1.83, 95% CI 1.44–2.34), pulmonary embolism (HR =1.46, 95% CI 1.11–1.91), alcohol abuse (HR =1.59, 95% CI 1.08–2.35), rheumatic disease (HR =1.40, 95% CI 1.07–1.83), and exposure to drugs with dynamic interaction mechanism with warfarin (HR =1.43, 95% CI 1.20–1.71). In age-adjusted models, Charlson comorbidity index and number of drugs predicted a graded increase in the hazard of early bleeding. Conclusion The rate of hospitalizations for bleeding peaked in the beginning of warfarin therapy. Early bleeders were characterized by venous thrombosis, pulmonary embolism, and factors that increase bleeding risk without affecting the international normalized ratio.
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Affiliation(s)
- Maria Rikala
- Department of Pharmacology, Drug Development and Therapeutics, University of Turku, Turku, Finland
| | - Helena Kastarinen
- Department of Pharmacology, Drug Development and Therapeutics, University of Turku, Turku, Finland; Social Insurance Institution, Regional Office for Eastern and Northern Finland, Kuopio, Finland
| | - Pekka Tiittanen
- Department of Pharmacology, Drug Development and Therapeutics, University of Turku, Turku, Finland
| | - Risto Huupponen
- Department of Pharmacology, Drug Development and Therapeutics, University of Turku, Turku, Finland; Unit of Clinical Pharmacology, Turku University Hospital, Turku, Finland
| | - Maarit Jaana Korhonen
- Department of Pharmacology, Drug Development and Therapeutics, University of Turku, Turku, Finland; Department of Public Health, University of Turku, Turku, Finland; Division of Pharmaceutical Outcomes and Policy, UNC Eshelman School of Pharmacy, The University of North Carolina at Chapel Hill, NC, USA
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