Evaluation of a warfarin initiation protocol for older people

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Abstract:

Abstract

A protocol for initiation of warfarin therapy, targeted specifically for older people and based on individual responses to initial warfarin doses, was evaluated in a case-control study. People within the protocol group: (i) received higher initial doses of warfarin, (ii) reached an international normalized ratio (INR) of 2 more quickly, (iii) spent more time with INR of 2−3 in the first week and (iv) were less likely to be over-anticoagulated. However, the proportion of people who reached an INR of 2 too quickly (in <4 days) was no greater. The protocol correctly predicted the maintenance dose range of warfarin in over 70% of cases. (Intern Med J 2003; 33: 465−467)

Keywords: aged; drug administration; warfarin administration and dosage; ­comparative study; ­warfarin adverse effects

Document Type: Research Article

DOI: http://dx.doi.org/10.1046/j.1445-5994.2003.00452.x

Affiliations: Christchurch School of Medicine and Health Sciences, University of Otago, Christchurch, New Zealand

Publication date: September 1, 2003

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