QID is a medical abbreviation that stands for "four times a day." It is commonly used in prescription writing to indicate the frequency of medication dosing.
QID and QD are medical abbreviations that are used to describe medication dosing frequency:
QID stands for "four times a day." This means the medication should be taken four times over a 24-hour period, with roughly equal intervals between doses.
QD stands for "once a day." This means the medication should be taken once every 24 hours, usually at the same time each day.