Correct Answer: C

Rationale: Yellow-tinged vision, along with nausea, vomiting, and confusion, are common manifestations of Digoxin toxicity. Visual disturbances are important to recognize as they can indicate the need for immediate medical attention and potential adjustment of Digoxin therapy to prevent serious complications. Elevated blood pressure is not typically associated with Digoxin toxicity; instead, hypotension may occur. Bradycardia is a common therapeutic effect of Digoxin rather than a sign of toxicity. Ringing in the ears, or tinnitus, is also a potential side effect of Digoxin but is less specific to toxicity compared to yellow-tinged vision.

Correct Answer: D

Rationale: Ketamine can produce psychological effects like hallucinations. Patients with schizophrenia may be more prone to experiencing exacerbation of their symptoms when exposed to Ketamine due to its potential to worsen psychotic symptoms. Therefore, schizophrenia can be a contraindication for the use of Ketamine as an anesthetic. Peptic ulcer disease, breast cancer, and diabetes mellitus are not contraindications for the use of Ketamine.

Correct Answer: D

Rationale: The correct answer is D: 'Monitor for leg cramps.' Leg cramps may indicate hypokalemia, an adverse effect of hydrochlorothiazide, and should be reported to the provider. Choice A is incorrect because hydrochlorothiazide is usually taken in the morning to avoid nocturia. Choice B is incorrect as hydrochlorothiazide is a diuretic that helps lower blood pressure. Choice C is incorrect as hydrochlorothiazide can be taken with or without food.

Correct Answer: B

Rationale: When a client is prescribed Clopidogrel, an antiplatelet medication, the nurse should instruct them to avoid taking aspirin or other NSAIDs. This is because both medications can increase the risk of bleeding when taken together, potentially leading to serious health complications. Therefore, it is crucial for the client to follow this instruction to ensure their safety and well-being while on Clopidogrel. Choices A, C, and D are incorrect because taking Clopidogrel with food, avoiding foods high in potassium, or taking the medication at bedtime are not specific instructions related to the safe use of Clopidogrel and do not address the potential interaction with aspirin, which is essential for the client's well-being.

Correct Answer: A

Rationale: Phenobarbital, with a long half-life of 4 days, remains at therapeutic levels in the body for an extended period. Due to this prolonged duration of action, the nurse should administer phenobarbital once a day to maintain a consistent therapeutic effect without the need for multiple daily doses. Administering the medication more than once a day would not be necessary and could increase the risk of side effects or toxicity. Therefore, the correct answer is to administer phenobarbital once a day.