What are Sig Codes!?
- Katie Reigelsperger

- Feb 10, 2022
- 1 min read
If you’ve ever received a handwritten prescription and aren’t sure what all of the codes and initials mean, you’re not alone! Sig codes are a way for the doctor to communicate to the pharmacy which medication the patient should take, when it should be taken, and how much of it should be taken. Most sig codes are derived from the Latin language which can make them a bit more confusing, so at KLR Pharmacy Technician Training School, we use handy clues to remember some of the trickier ones! It is also important to note that sig codes can be written in capital or lowercase letters; either way they indicate the same meaning. Here is a guide to keep on hand of some of the most frequently used sig codes and their meanings for prescriptions!





Sig codes are important for the doctor to communicate with pharmacists on the details of the prescribed medication.
Why are sig codes important?
Sig codes are important because they provide a standardized and efficient way for healthcare professionals to communicate prescription instructions. They help reduce errors, save time when writing prescriptions, and ensure medications are dispensed with accurate directions for patients.
Why do you think doctors use these instead of full words?
It is an easy way for the doctors and the pharmacist to communicate and know what each one to use for .
I think the most commonly used sig code would be Q since it's within the other combinations that tell the time of use. Like QD, QID, q2h, etc.
Sig codes are a way for the doctor to communicate to the pharmacy which medication the patient should take, when it should be taken, and how much of it should be taken.