Correct Answer: B

Rationale: The correct answer is B. When treating tuberculosis, using a combination of medications is crucial to reduce the risk of bacteria developing resistance to any single drug. This approach helps prevent treatment failure and ensures successful treatment outcomes. Choice A is incorrect because the primary purpose of using multiple medications is not related to allergic reactions. Choice C is incorrect as the risk reduction is mainly focused on bacterial resistance rather than adverse reactions. Choice D is not relevant as the purpose of taking multiple medications is not to affect the tuberculin skin test results.

Correct Answer: A

Rationale: The correct instruction for a client starting Warfarin is to monitor for signs of bleeding. Warfarin is an anticoagulant that increases the risk of bleeding; therefore, it is crucial for the client to watch for any signs of bleeding, such as easy bruising, prolonged bleeding from cuts, blood in urine or stools, or unusual bleeding from gums or nose. If any of these signs occur, the client should promptly report them to their healthcare provider for further evaluation and management. Choices B, C, and D are incorrect because avoiding foods high in vitamin K is related to other medications like Coumadin, increased urination is not a common side effect of Warfarin, and taking Warfarin with an antacid can potentially interfere with its absorption.

Correct Answer: D

Rationale: When a patient's apical pulse is 58 bpm, it is below the normal range. Propranolol is a beta-blocker that can further lower the heart rate. Therefore, it is crucial to withhold the medication and notify the healthcare provider to evaluate the patient's condition. Administering Propranolol in this situation can exacerbate bradycardia, leading to serious complications. Choosing to administer the medication as prescribed (Choice A) can put the patient at risk. Administering half of the normal dose (Choice B) without healthcare provider guidance is not appropriate in this case. Considering the extended-release form of the medication (Choice C) does not address the immediate concern of bradycardia and is not the best course of action.

Correct Answer: B

Rationale: Lactulose is administered to clients with cirrhosis to lower blood ammonia levels, thus aiding in the prevention of hepatic encephalopathy. Elevated ammonia levels in cirrhosis can lead to cognitive impairment and hepatic encephalopathy. Therefore, the correct answer is B (Ammonia). Glucose (Choice A) is not the component targeted by lactulose in cirrhosis. Potassium (Choice C) and Bicarbonate (Choice D) are not directly affected by lactulose administration in cirrhosis.

Correct Answer: B

Rationale: Clients prescribed verapamil should be advised to avoid grapefruit juice as it can potentiate the drug's effects, leading to adverse reactions. Grapefruit juice can inhibit the metabolism of verapamil, resulting in higher blood levels of the medication and an increased risk of side effects. Instructions such as taking the medication with a full glass of water (Choice A) are not specific to verapamil and are generally recommended. While monitoring blood pressure regularly (Choice C) is important for clients on antihypertensive medications, it is not a direct concern related to verapamil. Monitoring heart rate daily (Choice D) is not a primary consideration when starting verapamil, as it is more commonly used for its effects on blood pressure and arrhythmias rather than heart rate.