Correct Answer: C

Rationale: Grapefruit juice should be avoided when taking cyclosporine because it inhibits the metabolism of the medication, leading to increased blood levels and a higher risk of toxicity. It is important for the client to follow this dietary instruction to ensure the safe and effective use of cyclosporine.

Correct Answer: C

Rationale: After a thyroidectomy, the parathyroid glands can be inadvertently removed or damaged, leading to a decrease in calcium levels and potentially causing hypocalcemic tetany. Calcium gluconate is given to supplement calcium levels and prevent or treat hypocalcemia-related symptoms, such as muscle spasms and tetany.

Correct Answer: A

Rationale: Desmopressin promotes renal conservation of water by increasing the permeability of kidney collecting ducts to water, resulting in decreased urinary output. Therefore, the therapeutic response expected after administering desmopressin for diabetes insipidus is a reduction in urinary output.

Correct Answer: B

Rationale: Sodium polystyrene sulfonate, such as Kayexalate, is a cation exchange resin that functions by releasing sodium ions in exchange for primarily potassium ions. This medication is commonly used to treat hyperkalemia, a condition characterized by elevated levels of potassium in the blood.

Correct Answer: A

Rationale: The correct statement is 'I should brush and floss my teeth regularly.' Phenytoin (Dilantin) can cause gingival hyperplasia, so maintaining good oral hygiene is essential. Taking the medication with antacids can affect its absorption, so it should not be done. It is crucial not to stop taking the medication abruptly, even if seizures are controlled. There is no specific requirement to avoid milk while taking phenytoin (Dilantin).