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A Proposal for an I...
A Proposal for an Individualized Pharmacogenetics-Based Warfarin Initiation Dose Regimen for Patients Commencing Anticoagulation Therapy
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Avery, P. J. (författare)
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Jorgensen, A. (författare)
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- Hamberg, Anna-Karin (författare)
- Uppsala universitet,Klinisk farmakologi
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- Wadelius, Mia (författare)
- Uppsala universitet,Klinisk farmakogenomik och osteoporos
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Pirmohamed, M. (författare)
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Kamali, F. (författare)
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(creator_code:org_t)
- 2011-09-28
- 2011
- Engelska.
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Ingår i: Clinical Pharmacology and Therapeutics. - : Springer Science and Business Media LLC. - 0009-9236 .- 1532-6535. ; 90:5, s. 701-706
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- A significant proportion of the interindividual variability in warfarin dose requirements can be explained on the basis of CYP2C9 and VKORC1 genotypes. We report the development of a novel pharmacogenetics-based 3-day warfarin initiation dose (ID) algorithm based on the International Warfarin Pharmacogenetics Consortium (IWPC) maintenance dose algorithm and the CYP2C9 genotype-based variance in warfarin half-life. The predictive value of the pharmacogenetics-based ID was assessed in a large cohort of 671 newly diagnosed patients with thromboembolic disorders who were about to commence anticoagulation therapy in accordance with standard induction regimens. In patients with mean international normalized ratio (INR)(days 4-7)>4.0 (n = 63) after warfarin initiation, the pharmacogenetics-based ID algorithm predicted a markedly lower dose requirement (median reduction = 4.2 mg), whereas in those with mean INR(days 4-7) < 2.0 (n = 145), the predicted dose requirement was very similar to that in the standard regimen. The use of a pharmacogenetics-based ID may avoid overshooting of INR in warfarin-sensitive patients without unduly affecting the time taken to reach target range in the majority of patients.
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