Which abbreviation indicates a medication to be taken every other day?

The abbreviation that indicates a medication to be taken every other day is "QOD," which stands for "quaque altera die" in Latin. This term is specifically used in medical prescriptions to clarify that the medication should be administered every second day, thereby ensuring proper dosing intervals for the patient. Utilizing this abbreviation helps avoid misinterpretation that could occur with more common dosing terms, making it essential for medication management in a healthcare setting.

The other abbreviations provided do not convey the same meaning. For example, "QID" refers to medication being taken four times a day, indicating more frequent administration. "qh" specifies that a medication should be taken every hour, while "ac" means that a medication should be taken before meals. Thus, "QOD" is unique in its directive for alternating days, underscoring the importance of clear communication in medication administration.