What does the term "sig" refer to in pharmacy?

The term "sig" is derived from the Latin word "signa," which translates to "to write" or "label." In the context of pharmacy, it refers specifically to the instructions provided for how a patient should take or use a medication. This includes details such as the dosage, frequency, and route of administration. For example, a sig might indicate to take a medication "twice daily by mouth," ensuring that patients understand the correct way to use the medication for effective treatment. Understanding the sig is crucial for both the patient’s safety and the success of the medication therapy.