A milliliter and a milligram are the same measurement.

The assertion that a milliliter and a milligram are the same measurement is false because they measure different properties. A milliliter is a unit of volume, which indicates how much space a substance occupies. It is commonly used to measure liquids. In contrast, a milligram is a unit of mass, which refers to the amount of matter in an object. This distinction is crucial in medication dosing because the concentration of a substance (such as a drug) can vary significantly between different formulations. For instance, the same volume of two different substances may contain different masses depending on their density. Therefore, it is essential to understand that while both measurements are important in healthcare, they are not interchangeable and serve different purposes in medication administration.