A nurse is caring for a client who is on warfarin therapy for atrial fibrillation. The client's INR is 5.2. Which of the following medications should the nurse prepare to administer?
Atropine
Epinephrine
Vitamin K
Protamine
The Correct Answer is C
Choice A reason: Atropine is not the correct answer, as it is an anticholinergic medication that is used to treat bradycardia, not warfarin overdose. Atropine has no effect on the INR or the coagulation cascade.
Choice B reason: Epinephrine is not the correct answer, as it is a catecholamine medication that is used to treat anaphylaxis, cardiac arrest, or severe hypotension, not warfarin overdose. Epinephrine has no effect on the INR or the coagulation cascade.
Choice C reason: Vitamin K is the correct answer, as it is the antidote for warfarin overdose. Vitamin K is a fat-soluble vitamin that is essential for the synthesis of clotting factors II, VII, IX, and X. Vitamin K can reverse the effects of warfarin and lower the INR to a therapeutic range.
Choice D reason: Protamine is not the correct answer, as it is the antidote for heparin overdose, not warfarin overdose. Protamine is a protein that binds to and neutralizes heparin, but has no effect on warfarin or the INR.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: "Place one tablet under your tongue every 5 minutes for 30 minutes to relieve chest pain." is not the correct statement. This is an incorrect and potentially dangerous instruction, as it can cause overdose and severe hypotension. The nurse should instruct the client to place one tablet under the tongue at the first sign of chest pain, and repeat every 5 minutes for up to three doses, if needed. The client should call 911 if the pain is not relieved after the first dose.
Choice B reason: "Nitroglycerin decreases chest pain by dissolving blood clots that are occluding the arteries." is not the correct statement. This is a false and misleading explanation of how nitroglycerin works. Nitroglycerin does not dissolve blood clots, nor does it affect the occlusion of the arteries. Nitroglycerin is a vasodilator that relaxes the smooth muscle of the blood vessels, especially the veins. This reduces the preload and the oxygen demand of the heart, and relieves the chest pain caused by ischemia.
Choice C reason: "You can store the bottle of tablets in your bathroom medicine cabinet." is not the correct statement. This is an inappropriate and unsafe storage recommendation, as it can affect the potency and effectiveness of the medication. The nurse should instruct the client to store the bottle of tablets in a cool, dry, and dark place, away from heat, moisture, and light. The client should also keep the bottle tightly closed and replace it every 6 months, or as directed by the provider.
Choice D reason: "Nitroglycerin dilates cardiac blood vessels to deliver more oxygen to the heart." is the correct statement. This is a simple and accurate description of how nitroglycerin helps to relieve anginal pain. Nitroglycerin dilates the coronary arteries, which supply blood and oxygen to the heart muscle. This improves the blood flow and oxygen delivery to the ischemic areas of the heart, and reduces the pain and discomfort.
Correct Answer is C
Explanation
Choice A reason: Migraines are not a contraindication for propranolol. In fact, propranolol is used as a prophylactic treatment for migraines, as it reduces the frequency and severity of migraine attacks.
Choice B reason: Glaucoma is not a contraindication for propranolol. Propranolol does not affect the intraocular pressure or the drainage of aqueous humor in the eye.
Choice C reason: Asthma is a contraindication for propranolol. Propranolol is a nonselective beta-blocker, which means it blocks both beta-1 and beta-2 receptors in the body. Beta-2 receptors are found in the bronchial smooth muscle, and when they are blocked, they cause bronchoconstriction and increased airway resistance. This can worsen the symptoms of asthma and cause a life-threatening asthma attack.
Choice D reason: Depression is not a contraindication for propranolol. Propranolol does not cause depression, although it may cause some side effects such as fatigue, insomnia, and sexual dysfunction. However, these side effects are usually mild and reversible.
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