What is the priority intervention for an adult patient diagnosed with hyperparathyroidism to prevent long-term complications?

Rationale: A. Hyperparathyroidism results in excessive calcium in the blood (hypercalcemia) due to overactive parathyroid hormone (PTH). Administering additional calcium would worsen hypercalcemia and increase the risk of kidney stones and cardiac complications. B. Increasing fluid intake is a priority intervention in hyperparathyroidism. Adequate hydration helps dilute serum calcium levels, promote renal excretion of calcium, and reduce the risk of kidney stones, which are common long-term complications of hypercalcemia. Encouraging fluids is a safe, first-line preventive measure to minimize complications. C. A high-calcium diet would exacerbate hypercalcemia in patients with hyperparathyroidism. Dietary calcium restriction may be recommended in some cases, but increasing calcium intake is contraindicated. D. Vitamin D increases calcium absorption from the gut. Administering vitamin D without monitoring could raise calcium levels further, worsening hypercalcemia. Vitamin D supplementation is not routinely indicated unless a deficiency is present and carefully managed.