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Warfarin
Pronunciation
Definition 1
A drug that prevents blood from clotting. It belongs to the family of drugs called anticoagulants (blood thinners). (NCI Dictionary)
Definition 2
A synthetic anticoagulant. Warfarin inhibits the regeneration of vitamin K1 epoxide and so the synthesis of vitamin K dependent clotting factors, which include Factors II, VII, IX and X, and the anticoagulant proteins C and S. This inhibition results in a sequential depression of Factors VII, IX, X and II activities. Vitamin K is an essential cofactor for the post ribosomal synthesis of the vitamin K dependent clotting factors. The vitamin promotes the biosynthesis of gamma-carboxyglutamic acid residues in these proteins which are essential for biological activity. (NCI Thesaurus)
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