How often should a medication marked "QID" be taken?

The abbreviation "QID" stands for "quater in die," which is a Latin term that translates to "four times a day." A medication marked with this designation indicates that it should be taken at evenly spaced intervals throughout the day, generally meaning once every six hours, depending on the specific dosing schedule provided by a healthcare professional.

Understanding these medical abbreviations is crucial for accurate medication administration and adherence to dosing regimens. This is particularly important in pharmacy practice, where misinterpretation of these terms can lead to underdosing or overdosing of a patient. In this case, identifying "B" as the correct answer highlights the importance of recognizing and correctly applying pharmacological terminology.