Certified Paraoptometric (CPO) Practice Exam 2025

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What does "Qd" stand for in medical prescriptions?

Twice a day
Every day
Three times daily
Four times a day

The correct answer is: Every day

"Qd" stands for "every day" in medical prescriptions, derived from the Latin phrase "quaque die." This abbreviation is commonly used in clinical settings to indicate that a medication should be administered once daily. This clarity is vital in ensuring that patients adhere to their prescribed treatment regimens accurately, as it helps prevent potential issues related to medication misunderstanding. The options that refer to other frequencies, such as twice a day, three times daily, or four times a day, are associated with different terms, such as "bid," "tid," or "qid," respectively. Thus, while "Qd" effectively signifies "every day," the other abbreviations clearly define different dosing schedules.