What does the abbreviation 'q.d.' mean in medical prescriptions?

The abbreviation 'q.d.' stands for 'quaque die,' which is a Latin term meaning 'once each day' or 'every day.' This is a commonly used abbreviation in medical prescriptions to indicate that the medication should be taken once a day. It is crucial for healthcare professionals to understand this notation to ensure accurate medication administration and adherence to prescribed treatment regimens. Thus, when you see 'q.d.' on a prescription, it signifies that a patient is to take the medication daily, ensuring consistency in administration.