What medication is commonly administered to treat decreased calcium levels?

Calcium gluconate is frequently used in clinical settings to manage decreased calcium levels, also known as hypocalcemia. This medication is a calcium supplement that helps restore calcium levels in the blood and is particularly beneficial in acute situations, such as in cases of severe hypocalcemia or following certain medical treatments that may lower calcium levels.

Calcium gluconate is administered intravenously when rapid correction is necessary, providing an effective means to quickly elevate calcium levels in the bloodstream. It is also less irritating to the veins compared to other calcium salts, which makes it a preferred choice for emergency situations.

In contrast, while calcium carbonate is another form of calcium supplementation, it is typically used for long-term management of calcium deficiency and is taken orally, making it less suitable for urgent treatment scenarios. Vitamin D and calcitriol play roles in calcium absorption and metabolism but do not directly provide calcium; rather, they support the body's ability to absorb dietary calcium. Therefore, in the context of treating decreased calcium levels, calcium gluconate is the most immediate and effective option.