NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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Ace your North American Pharmacist Licensure Examination (NAPLEX) with our comprehensive practice test. Features include interactive flashcards, multiple-choice questions, with detailed hints and explanations. Fast-track your pharmacy career today!

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Enoxaparin (Lovenox) inactivates which factors for VTE prophylaxis?

Factor VIIa and IXa
Factor Ia and Va
Factor Xa and IIa
Factor VIIIa and Va

The correct answer is: Factor Xa and IIa

Enoxaparin (Lovenox) is a low molecular weight heparin that primarily inactivates Factor Xa and to a lesser extent, Factor IIa (thrombin). This mechanism of action makes Choice C the correct answer. Factors VIIa and IXa (Choice A) are not predominantly targeted by enoxaparin, so this choice is incorrect. Factor Ia and Va (Choice B) are also not the primary targets of enoxaparin, therefore this choice is incorrect. Factor VIIIa and Va (Choice D) are not affected by enoxaparin in the context of VTE prophylaxis, making this choice incorrect as well.