Correct Answer: B

Rationale: Candidiasis is a type of superinfection that can occur when antibiotics, like tetracycline, disrupt the normal flora, allowing overgrowth of fungi. Option A, allergic response, is incorrect because candidiasis is not typically an allergic reaction. Option C, renal toxicity, and option D, hepatotoxicity, are incorrect as they refer to adverse effects on the kidneys and liver, respectively, which are not directly related to the development of candidiasis.

Correct Answer: D

Rationale: Acetaminophen is the preferred analgesic for clients with peptic ulcer disease because it does not cause gastrointestinal irritation, unlike Ibuprofen, Naproxen, and Aspirin, which can exacerbate peptic ulcer symptoms and lead to gastrointestinal complications.

Correct Answer: D

Rationale: The correct answer is D: Liver function. Gemfibrozil can lead to hepatotoxicity, making it crucial to monitor liver function tests. Monitoring platelet count (choice A) is not specifically indicated for gemfibrozil. Electrolyte levels (choice B) and thyroid function (choice C) are not directly affected by gemfibrozil, so they are not the primary laboratory tests to monitor in this case.

Correct Answer: A

Rationale: The correct action the nurse should plan to take when preparing to administer iron dextran IV is to administer a small test dose before giving the full dose. This is done to assess for any allergic reactions that the client may have to the medication. Choice B is incorrect because iron dextran should be infused slowly over a longer period, typically over 1-2 hours to reduce the risk of adverse reactions. Choice C is incorrect because iron dextran administration is more commonly associated with hypotension rather than hypertension. Choice D is incorrect because cyanocobalamin is not used as an antidote for iron dextran toxicity; instead, treatment for iron toxicity may involve supportive care, chelation therapy, or in severe cases, iron antidotes like deferoxamine.

Correct Answer: C

Rationale: The correct answer is C: Hypotension. Enalapril, an ACE inhibitor, can lead to hypotension, especially after the first dose. Choices A, B, and D are incorrect because enalapril is not typically associated with ecchymosis, jaundice, or hypokalemia as common adverse effects. Therefore, the nurse should primarily monitor the client for signs of hypotension.