A Randomized Trial Comparing 5-mg and 10-mg Warfarin Loading Doses
Author(s) -
Mark Crowther,
Jeff Ginsberg,
Clive Kearon,
Linda Harrison,
Jian H. Johnson,
M. Patricia Massicotte,
Jack Hirsh
Publication year - 1999
Publication title -
archives of internal medicine
Language(s) - English
Resource type - Journals
eISSN - 1538-3679
pISSN - 0003-9926
DOI - 10.1001/archinte.159.1.46
Subject(s) - warfarin , medicine , dosing , warfarin sodium , confidence interval , loading dose , maintenance dose , randomized controlled trial , therapeutic index , clinical endpoint , anesthesia , pharmacology , atrial fibrillation , drug
Warfarin sodium therapy is usually initiated with a loading dose to reduce the time required to elevate the international normalized ratio (INR). Warfarin loading doses are associated with early overanticoagulation and the development of a potential hypercoagulable state; they also may not hasten achieving an INR value between 2.0 and 3.0. This study was designed to prospectively confirm our observation that a 5-mg warfarin sodium loading dose is as effective as a 10-mg loading dose in achieving a therapeutic INR for 2 consecutive days on days 3 and 4 or 4 and 5 of therapy.
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