Which abbreviation indicates every other day?

Which abbreviation indicates every other day?

• A. q.h.
• B. q.i.d.
• C. q.o.d.
• D. q 12 h

Answer: (C)

Understanding how medical abbreviations for dosing intervals work helps you read prescriptions correctly. Every other day is written as quaque altera die, abbreviated q.o.d. This exactly matches the idea of dosing on alternate days, so it’s the right choice here. By contrast, q.h. means every hour, q.i.d. means four times daily, and a schedule like “every 12 hours” corresponds to q 12 h, which is twice a day, not every other day.

Understanding how medical abbreviations for dosing intervals work helps you read prescriptions correctly. Every other day is written as quaque altera die, abbreviated q.o.d. This exactly matches the idea of dosing on alternate days, so it’s the right choice here. By contrast, q.h. means every hour, q.i.d. means four times daily, and a schedule like “every 12 hours” corresponds to q 12 h, which is twice a day, not every other day.