Correct Answer: B

Rationale: Allopurinol can increase the risk of kidney stones as a side effect. To prevent this adverse effect, it is essential for the client to increase their fluid intake. Adequate hydration can help in preventing the formation of kidney stones by keeping urine dilute and flushing out substances that can lead to stone formation.

Correct Answer: C

Rationale: Furosemide is a diuretic that can lead to orthostatic hypotension, causing dizziness and falls. Instructing the client to change positions slowly helps prevent these adverse effects by allowing the body to adjust to postural changes gradually, reducing the risk of significant blood pressure drops upon standing up quickly.

Correct Answer: B

Rationale: The client's serum calcium level is below the expected reference range, indicating hypocalcemia. Calcium carbonate, an oral form of calcium, is used to increase serum calcium levels to the expected range in cases of hypocalcemia. It helps correct the deficiency by supplementing calcium in the body.

Correct Answer: C

Rationale: Propranolol is a nonselective beta-blocker that can cause bronchoconstriction, making it contraindicated for clients with a history of bronchial asthma. Reporting a history of bronchial asthma to the provider is crucial as it would prompt a review of the medication prescription to avoid potential adverse effects and consider alternative treatment options.

Correct Answer: D

Rationale: To prevent Otitis Externa, the nurse should instruct the client to tip the head to the side to allow water to drain out after showering or swimming. This helps to prevent moisture buildup in the ear canal, reducing the risk of developing Otitis Externa, commonly known as swimmer's ear.