What does the abbreviation "QD" stand for in a prescription?

The abbreviation "QD" stands for "quaque die," which is Latin for "once a day." In the context of a prescription, it indicates that a medication should be taken one time every day. This instruction is significant for ensuring that patients adhere to their dosing schedules effectively, as consistent daily administration can be crucial for the medication's efficacy and for maintaining therapeutic levels in the body. Ensuring patients understand their medication instructions, including dosing frequency, is a key responsibility of pharmacy technicians to promote safe and effective treatment.