A nurse is caring for a client who has a new prescription for warfarin.Which of the following is a therapeutic use of this medication?
This medication prevents venous thrombosis.
This medication prevents angina pectoris.
This medication is to treat bradycardia.
This medication is to treat hypertension.
The Correct Answer is A
Choice A rationale
Warfarin is an anticoagulant that is used to prevent venous thrombosis and thromboembolic events by inhibiting the synthesis of vitamin K-dependent clotting factors.
Choice B rationale
Warfarin is not used to prevent angina pectoris, which is typically managed with nitrates, beta-blockers, or calcium channel blockers.
Choice C rationale
Warfarin is not used to treat bradycardia, which is usually managed with medications like atropine or pacemaker implantation.
Choice D rationale
Warfarin is not used to treat hypertension. Antihypertensive medications such as ACE inhibitors, beta-blockers, or diuretics are used for this purpose.
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Related Questions
Correct Answer is D
Explanation
Choice A rationale
Tumor enhancer genes are not typically a recognized category in cancer genetics. Proto-oncogenes and DNA repair genes are relevant to cancer development.
Choice B rationale
This choice is incorrect as there are genes like proto-oncogenes, tumor suppressor genes, and DNA repair genes that play roles in cancer.
Choice C rationale
This choice is partially correct but incomplete without including DNA repair genes, which are also crucial in cancer prevention.
Choice D rationale
This choice is correct as proto-oncogenes can become oncogenes, tumor suppressor genes prevent uncontrolled cell growth, and DNA repair genes fix DNA mutations that can lead to cancer.
Correct Answer is B
Explanation
Choice A rationale
Celecoxib does not inhibit the histamine response. Histamine is involved in allergic reactions, and celecoxib is a nonsteroidal anti-inflammatory drug (NSAID) that targets specific enzymes involved in inflammation.
Choice B rationale
Celecoxib specifically inhibits COX-2, an enzyme involved in the inflammation pathway. This selective inhibition helps reduce inflammation and pain without significantly affecting COX-1, which is protective for the stomach lining.
Choice C rationale
COX-1 is not the primary target of celecoxib. Inhibition of COX-1 can lead to gastrointestinal side effects, which celecoxib aims to minimize by selectively inhibiting COX-2 instead.
Choice D rationale
Celecoxib does not inhibit beta receptors. Beta receptors are involved in cardiovascular responses, and beta blockers are used for conditions like hypertension, not inflammation.
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