What does "mEq" stand for in medication dosage?

The term "mEq" stands for milliequivalent, which is a unit of measurement used to express the amount of a substance based on its chemical activity rather than its weight. In pharmacology, the concept of milliequivalents is particularly important when discussing electrolytes and ions, such as potassium, sodium, and calcium. This measurement takes into consideration both the valence (charge) of the ions and their concentration.

Using milliequivalents allows healthcare professionals to administer precise doses of electrolytes that reflect their physiological impact within the body. For instance, when dealing with electrolyte balances or replacements, knowing the milliequivalent amount ensures that a patient receives an appropriate dosage that corresponds to their specific needs.

The other options do not accurately represent the meaning of "mEq." Microequivalent is not a standard term used in medication dosage, while milligram equivalent and macroequivalent do not align with the conventional use in pharmacological practices.