Correct Answer: A

Rationale: Low potassium levels can lead to Digoxin toxicity because Digoxin competes with potassium for binding sites on the sodium-potassium pump, and when potassium levels are low, there is an increased risk of Digoxin binding and toxicity.

Correct Answer: D

Rationale: The correct answer is D because Raltegravir works by blocking the integrase enzyme, preventing the virus from integrating its genetic material into the host cell's DNA. This action inhibits viral replication within the host cell, making it an essential mechanism of action for managing viral infections.

Correct Answer: C

Rationale: Monitoring the client's blood glucose level is essential when taking Glipizide, as it is a medication used to lower blood glucose levels in individuals with Diabetes Mellitus. By monitoring the blood glucose level, the nurse can assess the effectiveness of the medication in managing the client's condition.

Correct Answer: A

Rationale: The correct answer is to advise the client to avoid consuming foods high in vitamin K. Warfarin's effectiveness can be affected by vitamin K intake. Clients should maintain a consistent intake of vitamin K and avoid sudden increases in foods high in vitamin K to ensure the medication works properly and consistently.

Correct Answer: B

Rationale: The correct answer is to 'Avoid potassium-rich foods.' Spironolactone is a potassium-sparing diuretic, and consuming foods high in potassium can lead to hyperkalemia, a potential side effect of the medication. Therefore, the client should be advised to avoid potassium-rich foods to prevent complications.