Which abbreviation should NOT be used in pharmacy practice?

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Multiple Choice

Which abbreviation should NOT be used in pharmacy practice?

In pharmacy practice, dosing abbreviations must be unambiguous to prevent misinterpretation and medication errors. The one that should not be used is Q.D. because its handwritten form with a dot can be read incorrectly, and the letters can be mistaken for other frequencies such as four times daily (QID) or every other day (QOD). Writing out the frequency as “daily” or “every day” (or “every 24 hours”) communicates once‑daily dosing clearly and reduces the risk of wrong dosing. Other notations in this list are commonly used when written clearly: for example, mL is the standard for milliliters when correctly written as mL, and decimal doses are safest with a leading zero (0.5 mg) to avoid misreading the decimal.

In pharmacy practice, dosing abbreviations must be unambiguous to prevent misinterpretation and medication errors. The one that should not be used is Q.D. because its handwritten form with a dot can be read incorrectly, and the letters can be mistaken for other frequencies such as four times daily (QID) or every other day (QOD). Writing out the frequency as “daily” or “every day” (or “every 24 hours”) communicates once‑daily dosing clearly and reduces the risk of wrong dosing.

Other notations in this list are commonly used when written clearly: for example, mL is the standard for milliliters when correctly written as mL, and decimal doses are safest with a leading zero (0.5 mg) to avoid misreading the decimal.

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