Understanding 'Sig' in Prescriptions: Meaning & Usage

The medical abbreviation "sig" stands for "signa," which means "label" or "write." It is used in prescriptions to provide instructions to the patient on how to take the medication. The "sig" abbreviation is followed by the specific directions, such as how often the medication should be taken, the dosage, and when to take it (e.g., "sig bid," which means twice a day, or "sig hs," which means at bedtime).

Here are some common examples of "sig" abbreviations used in prescriptions:

- sig bid: twice a day

- sig tid: three times a day

- sig qid: four times a day

- sig hs: at bedtime

- sig ac: before meals

- sig pc: after meals

- sig prn: as needed

These abbreviations help ensure that patients receive accurate and clear instructions on how to take their medications, reducing the risk of errors or misunderstanding. Medical professionals should always provide complete and written instructions along with any abbreviations used in prescriptions to ensure patient safety.