![]() ![]() This prospective outpatient intervention prevented a hospital admission and reduced the patient's hemorrhagic risk related to excessive anticoagulation. Thus, oral vitamin K was administered to prevent the anticipated international normalized ratio rise that would be predicted. Because warfarin overdosing rarely is discovered within minutes of its occurrence, standard reversal strategies in response to an elevated international normalized ratio (INR) that would be implemented do not apply to her case. This case describes a 64-year-old patient during the warfarin dose titration phase of her anticoagulation therapy that confuses the physical appearance of her tablets, resulting in a warfarin overdose. Another advantage of this preparation is that it can be used as an antidote against digitalis toxicity, but the warfarin interactions with other drugs are. Warfarin dosing regimens can be complicated and require frequent adjustments, which presents a significant opportunity for error, especially in patients that require extensive pharmacotherapy outside of anticoagulation. It is available orally, subcutaneously, and intravenously. Anticoagulation therapy with warfarin continues to present ongoing therapeutic dilemmas because of the complexity associated with its narrow therapeutic range. Vitamin K or phytonadione has been used for warfarin reversal for many years. ![]()
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