The prescription for a medication taken 3 times a day uses which notation?

The notation indicating that a medication should be taken three times a day is abbreviated as TID, which stands for "ter in die" in Latin, translating to "three times a day." This designation is commonly used in medical prescriptions to ensure clarity in dosage frequency for patients and healthcare practitioners.

Understanding the other abbreviations can clarify why TID is the correct choice. BID stands for "bis in die," which means "twice a day," while QID means "quater in die," indicating four times a day. The abbreviation q.d. signifies "quaque die," which translates to "once a day." Hence, TID is specifically intended for prescriptions that require dosing three times daily, distinctly separating it from the other frequencies.