Correct Answer: B

Rationale: Furosemide, a diuretic, commonly causes hyponatremia (low sodium levels) as it increases the excretion of sodium. The nurse needs to monitor the client for signs of hyponatremia, such as confusion, weakness, and muscle cramps, by checking electrolyte levels regularly.

Correct Answer: D

Rationale: The nurse should monitor the client for hemorrhagic cystitis when receiving cyclophosphamide due to its potential to cause bladder irritation and lead to this serious adverse effect. It is essential to assess for symptoms such as hematuria, dysuria, and flank pain.

Correct Answer: B

Rationale: In case anginal pain persists after taking the first tablet and waiting 5 minutes, the priority step is to call emergency services (911) and then take a second sublingual tablet. Persistent pain could indicate a myocardial infarction, and immediate medical attention is crucial. If the pain continues even after the second tablet, the client can take a third tablet after an additional 5-minute wait.

Correct Answer: B

Rationale: The correct answer is to instruct the client to remain upright for 30 minutes after taking Alendronate. Alendronate can cause esophageal irritation and even ulceration if it remains in contact with the esophagus. By staying upright, the medication is more likely to pass through the esophagus and into the stomach, reducing the risk of irritation and complications.

Correct Answer: A

Rationale: The correct answer is folic acid. Methotrexate is a folic acid antagonist, and supplementing with folic acid can help reduce the risk of methotrexate toxicity. Folic acid supplementation is commonly recommended to counteract the effects of methotrexate on folate metabolism.