Correct Answer: A

Rationale: In cases of magnesium sulfate toxicity, administering calcium gluconate IV is crucial as it is the antidote for magnesium sulfate. Calcium gluconate helps reverse the effects of magnesium sulfate, especially when signs of toxicity like respiratory depression or loss of reflexes occur. Increasing the magnesium sulfate infusion would worsen toxicity. Administering IV fluids may be beneficial for hydration but does not address magnesium sulfate toxicity. Hydralazine is used to manage hypertension, not magnesium sulfate toxicity.

Correct Answer: C

Rationale: The correct action for a nurse when administering enoxaparin for DVT prevention is to inject the medication into the lateral abdominal wall. This is the recommended site for enoxaparin administration. Expelling the air bubble is unnecessary and may lead to a dosage error. Massaging the injection site is not recommended as it can cause bruising. Administering an NSAID for injection site discomfort is not necessary as discomfort should be minimal and transient.

Correct Answer: C

Rationale: The correct answer is C: 'Rice with black beans.' Plant-based proteins such as beans are recommended for clients with hepatic encephalopathy to reduce ammonia production from animal proteins. Cottage cheese (choice A), tuna salad (choice B), and a three-egg omelet (choice D) are high in animal proteins, which can contribute to increased ammonia levels in hepatic encephalopathy, making them less suitable dietary choices for these clients.

Correct Answer: C

Rationale: The correct instruction for a client prescribed with doxazosin is to rise slowly when sitting up. Doxazosin can cause orthostatic hypotension, leading to dizziness upon sudden position changes. Instructing the client to rise slowly helps prevent this side effect. Choices A, B, and D are incorrect because they are not directly related to the potential side effects or administration of doxazosin.

Correct Answer: C

Rationale: The correct answer is C: Impaired liver function. Impaired liver function is a contraindication to the use of oral contraceptives because they are metabolized in the liver. Choices A, B, and D are incorrect. Thyroid disease, allergy to penicillin, and abnormal blood glucose levels are not contraindications to combined oral contraceptives.