What does "SIG" refer to in a prescription?

In a prescription, "SIG" refers to the directions for how to take the medication. This term is derived from the Latin word "signa," which means "to label" or "to write." The SIG notation typically includes details such as the dosage, frequency of administration, and any specific instructions related to the medication. For example, it may specify that a patient should take the medication once a day, twice a day, with food, or at bedtime. This information is critical for ensuring the safe and effective use of the medication by the patient, as it helps them understand exactly how to use the prescribed treatment.

Recognizing the importance of clear instructions reinforces adherence to the prescribed regimen and minimizes the risk of medication errors, which is a fundamental role of pharmacy technicians in patient care.