Objective: Rivaroxaban is a new anticoagulant option for dogs, yet its reported oral bioavailability is as low as 60%. The objective of this study was to examine the influence of feeding and gastroprotectant medications on the bioactivity (anti-Xa activity) of rivaroxaban in healthy dogs.
Design: Prospective experimental study.
Setting: University research laboratory.
Animals: Five healthy neutered male purpose-bred Beagles.
Interventions: Dogs were administered a median dose of 1.8 mg/kg rivaroxaban (range, 1.6-1.8 mg/kg) orally once daily for 2 consecutive days with either (1) no food, (2) food, (3) sucralfate 30 minutes before rivaroxaban, or (4) omeprazole at the same time as rivaroxaban. Blood was collected from preplaced jugular catheters immediately before and at 6 time points after rivaroxaban administration (2, 4, 8, 24, 36, and 48 hours). A rivaroxaban calibrated anti-Xa activity assay (RIVA) was used to monitor anticoagulant effect.
Measurements And Main Results: Rivaroxaban administration resulted in significant increases in RIVA (P = 0.02), with peak activities occurring 2 to 4 hours after dosingduring each study arm. No feeding was associated with significantly higher RIVA at the 36-hour time point compared to all other treatment arms (P < 0.0001), and feeding resulted in high RIVA at the 48-hour time point compared with sucralfate administration (P = 0.003). No significant changes in RIVA were otherwise identified with respect to feeding or gastroprotectant administration (P = 0.2).
Conclusions And Clinical Importance: Although administration without food demonstrated an apparent increase in RIVA 36 hours after drug administration, clinically relevant differences among treatment groups were not identified in combined analyses of time points. Based on these results, dogs treated with rivaroxaban do not require special modification of feeding practices or gastroprotectant drug administration.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/vec.13019 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Systematic Analysis of the Design, Methodology and Patient Population Characteristics of the Pediatric Direct Oral Anticoagulant (DOAC) Trials of Venous Thromboembolism Treatment.
J Thromb Haemost
January 2025
Department of Paediatrics, Medical University of Vienna, Vienna, Austria.
Introduction: The pediatric direct oral anticoagulation (DOAC) trials provide an opportunity to evaluate and characterize challenges in their design and execution to inform future antithrombotic trials.
Objective: To perform a systematic review of pediatric DOAC trials for the treatment of venous thromboembolism to critically appraise their methodology and understand the feasibility and challenges.
Methods: Systematic search of MEDLINE, EMBASE, the Cochrane Library and ClinicalTrials.
Peak and Trough Concentrations of Apixaban and Rivaroxaban in Adult Patients: A Systematic Review and Meta-Analysis.
J Thromb Haemost
January 2025
Center for Quality Management of Medicines, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia. Electronic address:
Article Synopsis
- Apixaban and rivaroxaban, both factor Xa inhibitors, are used for treating conditions like venous thromboembolism and preventing strokes in atrial fibrillation patients, but their optimal concentration levels in real-world settings are not well understood.
- Researchers conducted a meta-analysis of 16 observational studies to establish average peak and trough concentrations for these medications, involving a total of 2,375 patients.
- The study found that average peak concentrations for apixaban and rivaroxaban were within expected ranges, and certain factors like age and creatinine clearance were found to influence these concentrations.
Health Care Resource Use and Costs of Rivaroxaban Versus Warfarin Among Nonvalvular Atrial Fibrillation Polypharmacy Patients With Obesity.
J Am Heart Assoc
January 2025
Janssen Scientific Affairs LLC, a Johnson & Johnson company Titusville NJ USA.
Background: The economic burden of nonvalvular atrial fibrillation (NVAF) is substantial. Many patients with NVAF are obese and manage other health conditions requiring multiple medications. This real-world study compared health care resource use (HRU) and costs for rivaroxaban and warfarin in patients with NVAF who had polypharmacy and obesity.
View Article and Find Full Text PDF: Dual-pathway inhibition (DPI) with aspirin and rivaroxaban exhibited a net clinical benefit for patients with cardiovascular disease in the randomized COMPASS trial. The non-observational, international XATOA registry showed that the COMPASS results can be reproduced in clinical practice in patients with coronary artery disease (CAD) and peripheral artery disease (PAD). Here we report patient characteristics and clinical outcomes for the subgroup of German PAD patients of the XATOA registry and compare them to COMPASS PAD patients.
View Article and Find Full Text PDFReal-Time Imaging of Platelet-Initiated Plasma Clot Formation and Lysis Unveils Distinct Impacts of Anticoagulants.
Thromb Haemost
January 2025
Department of Medical Physiology, Hamamatsu University School of Medicine, Hamamatsu, Japan.
Background: Fibrinolysis is spatiotemporally well-regulated and greatly influenced by activated platelets and coagulation activity. Our previous real-time imaging analyses revealed that clotting commences on activated platelet surfaces, resulting in uneven-density fibrin structures, and that fibrinolysis initiates in dense fibrin regions and extends to the periphery. Despite the widespread clinical use of direct oral anticoagulants (DOACs), their impact on thrombin-dependent activation of thrombin-activatable fibrinolysis inhibitor (TAFI) and fibrinolysis remains unclear.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!