A nurse is caring for a client who is prescribed warfarin via oral (PO) route.
Two hours after the administration of warfarin, the client reports having dark tarry stools and petechiae.
Based on the client's presenting symptoms, which of the following options is an antidote for warfarin toxicity?
Vitamin K1.
Protamine sulfate.
Heparin.
Digibind.
The Correct Answer is A
Choice A rationale
Vitamin K1 is used as an antidote for warfarin toxicity because it helps in the synthesis of clotting factors, reversing the anticoagulant effects of warfarin.
Choice B rationale
Protamine sulfate is used to counteract the effects of heparin, not warfarin.
Choice C rationale
Heparin is an anticoagulant and would worsen bleeding if given in the case of warfarin toxicity.
Choice D rationale
Digibind is used to treat digoxin toxicity and has no role in reversing the effects of warfarin. .
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Bradycardia is not a common complication of ondansetron (Zofran). Instead, one should watch for changes in heart rhythm such as QT interval prolongation.
Choice B rationale
Absence of nausea indicates the desired effect of ondansetron, not a complication.
Choice C rationale
Ondansetron is associated with prolongation of the QT interval, not shortening. QT interval shortening is not a recognized complication.
Choice D rationale
Prolonged QT interval is a known complication of ondansetron and can increase the risk of life-threatening arrhythmias. .
Correct Answer is A
Explanation
Choice A rationale
A receptor antagonist blocks the effects of normal cellular functions by binding to receptor sites and preventing endogenous substances (like hormones or neurotransmitters) from activating those receptors.
Choice B rationale
Receptor antagonists do not accelerate hormones attaching to cell receptor sites; they prevent this process by blocking the receptors.
Choice C rationale
Receptor antagonists do not minimize the risk of other medications becoming toxic. They specifically block the action of certain endogenous substances.
Choice D rationale
Receptor antagonists do not increase the action of cells; rather, they inhibit or block the usual effects.
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