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Warfarin is an anticoagulant that opposes the procoagulant effect of vitamin K by inhibiting the VKORC enzyme. If these patients are prescribed warfarin for another medical purpose, they will require lower doses than usual because the patient is already deficient in VKORC.
The rodenticide chemicals are sometimes incorrectly referred to as "coumadins" rather than 4-hydroxycoumarins ("Coumadin" is a brand name for warfarin). They are also referred to as "coumarins," in reference to their derivation, although this term also may be deceptive since coumarin itself, as noted, is not active in clotting, and is used ...
In enzymology, a vitamin-K-epoxide reductase (warfarin-sensitive) (EC 1.17.4.4) is an enzyme that catalyzes the chemical reaction 2-methyl-3-phytyl-1,4-naphthoquinone + oxidized dithiothreitol ⇌ {\displaystyle \rightleftharpoons } 2,3-epoxy-2,3-dihydro-2-methyl-3-phytyl-1,4-naphthoquinone + 1,4-dithiothreitol
And anyone taking blood-thinning medication, such as warfarin, should note the vitamin K content of pickles and discuss potential dietary restrictions with their doctor, as this nutrient may ...
Vitamin K epoxide reductase (VKOR) is an enzyme (EC 1.17.4.4) that reduces vitamin K after it has been oxidised in the carboxylation of glutamic acid residues in blood coagulation enzymes. VKOR is a member of a large family of predicted enzymes that are present in vertebrates, Drosophila , plants, bacteria and archaea . [ 1 ]
There has been rare reports of oral vitamin K adverse effects. Intravenous vitamin K admission had reports of low blood pressure, shortness of breath, flushing, and other serious allergic reactions. [6] [13] Vitamin K needs to be diluted to an aqueous solution for administration as a it is a fat-soluble vitamin. Reports of hypersensitivity of ...
Lengyel M (December 2004). "[Warfarin or acenocoumarol is better in the anticoagulant treatment of chronic atrial fibrillation?]". Orvosi Hetilap. 145 (52): 2619– 2621. PMID 15724697. Ufer M (2005). "Comparative pharmacokinetics of vitamin K antagonists: warfarin, phenprocoumon and acenocoumarol". Clinical Pharmacokinetics. 44 (12): 1227– 1246.
Phytomenadione, also known as vitamin K 1 or phylloquinone, is a vitamin found in food and used as a dietary supplement. [4] [5] It is on the World Health Organization's List of Essential Medicines. [6] It is used to treat certain bleeding disorders, [5] including warfarin overdose, vitamin K deficiency, and obstructive jaundice. [5]
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