Which medication is used to improve calcium absorption?

Zemplar is a form of paricalcitol, a vitamin D analog specifically used in patients with chronic kidney disease to improve calcium absorption and manage secondary hyperparathyroidism. In renal patients, the kidneys have a diminished ability to convert vitamin D into its active form, which is essential for the absorption of calcium from the diet. By administering Zemplar, the active form of vitamin D helps to enhance intestinal calcium absorption, thereby contributing to better overall calcium balance and lowering parathyroid hormone levels.

In contrast, the other medications listed do not play a role in enhancing calcium absorption. Epogen is primarily used to stimulate red blood cell production, Heparin is an anticoagulant that prevents blood clotting, and Lidocaine is used mainly as a local anesthetic. None of these agents have any direct influence on calcium absorption in the body, which is why Zemplar is the optimal choice for this function.