Certified Paraoptometric (CPO) Practice Exam 2025

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What does "qad" mean in prescription terminology?

Once a day
Every other day
Three times a day
Twice a day

The correct answer is: Every other day

In prescription terminology, "qad" stands for "quaque altera die," which is Latin for "every other day." This abbreviation is used by healthcare professionals to indicate how frequently a medication should be taken. This specific term helps ensure that the patient understands the intended dosing schedule without the need for lengthy explanations, making it essential in maintaining adherence to treatment plans. The correct understanding of this term is crucial for both the patient and the healthcare provider to ensure proper use of medications. Misinterpretation of dosing instructions can lead to ineffective treatment or increased risk of adverse effects, emphasizing the importance of clarity in prescription language.