Edoxaban is indicated to reduce the risk of stroke and systemic embolism (SE) in patients with nonvalvular atrial fibrillation (NVAF). However, it should not be used in patients with creatinine clearance (CrCL) > 95 mL/min because of increased risk of ischemic stroke compared to warfarin at the highest dose studied (60 mg). It is also indicated for the treatment of deep vein thrombosis (DVT) and pulmonary embolism (PE) following 5-10 days of initial therapy with a parenteral anticoagulant.
Administration of edoxaban results in prolongation of clotting time tests such as aPTT (activated partial thromboplastin time), PT (prothrombin time), and INR (international normalized ratio).
Mode of Action:
Edoxaban is a selective inhibitor of factor Xa, a serine endopeptidase of the clotting cascade required for cleavage of prothrombin into thrombin.
Edoxaban is not extensively metabolized by CYP3A4 resulting in minimal drug-drug interactions. However, it does interact with drugs that inhibit p-gp (p-glycoprotein), which is used to transport edoxaban across the intestinal wall. Unchanged edoxaban is the predominant form in plasma. There is minimal metabolism via hydrolysis (mediated by carboxylesterase 1), conjugation, and oxidation by CYP3A4. The predominant metabolite M-4, formed by hydrolysis, is human-specific and active and reaches less than 10% of the exposure of the parent compound in healthy subjects. Exposure to the other metabolites is less than 5% of exposure to edoxaban.
Premature discontinuation of any oral anticoagulant, including edoxaban, in the absence of adequate alternative anticoagulation increases the risk of ischemic events. If edoxaban is discontinued for reasons other than pathological bleeding or completion of a course of therapy, consider the use of another anticoagulant. Edoxaban increases the risk of potentially fatal major bleeding such as intracranial hemorrhage and gastrointestinal bleeding. Patients should be educated on how to watch for signs of major and minor bleeding and when to seek medical help. Co-administration of other anti-coagulants, anti-platelets, or thrombolytics may increase the risk of bleeding and should therefore be avoided.
Turpie AG: New oral anticoagulants in atrial fibrillation. Eur Heart J. 2008 Jan;29(2):155-65. Epub 2007 Dec 19. PubmedOgata K, Mendell-Harary J, Tachibana M, Masumoto H, Oguma T, Kojima M, Kunitada S: Clinical safety, tolerability, pharmacokinetics, and pharmacodynamics of the novel factor Xa inhibitor edoxaban in healthy volunteers. J Clin Pharmacol. 2010 Jul;50(7):743-53. doi: 10.1177/0091270009351883. Epub 2010 Jan 15. PubmedYeh CH, Hogg K, Weitz JI: Overview of the new oral anticoagulants: opportunities and challenges. Arterioscler Thromb Vasc Biol. 2015 May;35(5):1056-65. doi: 10.1161/ATVBAHA.115.303397. Epub 2015 Mar 19. PubmedSenoo K, Lip GY: Comparative efficacy and safety of the non-vitamin K antagonist oral anticoagulants for patients with nonvalvular atrial fibrillation. Semin Thromb Hemost. 2015 Mar;41(2):146-53. doi: 10.1055/s-0035-1544156. Epub 2015 Feb 15. PubmedParasrampuria DA, Truitt KE: Pharmacokinetics and Pharmacodynamics of Edoxaban, a Non-Vitamin K Antagonist Oral Anticoagulant that Inhibits Clotting Factor Xa. Clin Pharmacokinet. 2015 Nov 30. Pubmed
Products currently covered by valid US Patents are offered for R&D use in accordance with 35 USC 271(e)+A13(1). Any patent infringement and resulting liability is solely at buyer risk.
API’s From Quality Manufacturers:
Cost effective materials based on specific requirements
Small quantities for initial research and larger development quantities towards product commercialization
Technical packages, letters of access to filed DMFs