What does the abbreviation "sig" refer to in prescription terms?

The abbreviation "sig" in prescription terms refers specifically to the instructions for use provided to the patient. It is derived from the Latin "signa," which means "to write" or "to mark." In a prescription, the "sig" section outlines how the patient should take the medication, including the dosage, frequency, and manner of administration. These directions are crucial for ensuring the medication is used safely and effectively.

In this context, the correct choice highlights the essential role of the "sig" abbreviation in conveying vital information to both pharmacists and patients regarding medication usage. While there are other terms within the pharmaceutical context, none match the specific instructional purpose that "sig" serves.