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 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.
Correct Answer is C
Explanation
Choice A rationale
Metoprolol is a beta-blocker used for hypertension and angina, not for controlling blood sugar levels.
Choice B rationale
Glucagon is used to treat severe hypoglycemia by increasing blood glucose levels, not for regular blood sugar control.
Choice C rationale
Metformin is an oral hypoglycemic agent used to lower elevated blood glucose levels in type 2 diabetes.
Choice D rationale
Nitroglycerin is a nitrate used to treat angina by dilating blood vessels, not for blood sugar control.
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