Which of the following is a common medication delivered through a central intravenous line?

Antibiotics are commonly delivered through a central intravenous line because this route allows for rapid administration and precise control of the drug dosage. Central lines are especially beneficial for antibiotics that may irritate peripheral veins or require higher concentrations, ensuring that they reach the systemic circulation quickly and effectively. This method is also useful for patients who require long-term antibiotic treatment, making it less likely for complications such as phlebitis or infiltration to occur.

In contrast, insulin, while it can be delivered via a central line, is more frequently administered through subcutaneous injections or insulin pumps for diabetic management. Antacids, which are primarily used for gastric issues, are typically given orally or via an enteral feeding tube rather than through a central line. Oral rehydration solutions are designed for administration orally to treat dehydration, making them inappropriate for central IV delivery.