2 Sig Codes and Directions Free Online FlashCards

What does a prescription’s Sig provide?

A Sig gives directions for using a medication.

What does PO mean in a Sig?

PO means by mouth.

How do “twice daily” and “every 12 hours” differ?

“Twice daily” specifies two doses per day; “every 12 hours” specifies an interval. Do not treat them as interchangeable.

What should you do when a Sig is unclear or conflicting?

Sig codes are not universal. If a code or direction is unclear or conflicting, seek clarification rather than guessing.

What should a complete medication direction specify?

A complete direction states the amount, route, timing or frequency, and any applicable conditions or limits.

What does BID mean, and what interval does it not guarantee?

BID means twice daily; it does not necessarily mean exactly every 12 hours.

What does TID mean in a Sig?

TID means three times daily.

What does QID mean in a Sig?

QID means four times daily.

What does PRN mean, and what qualifications should be preserved?

PRN means as needed. Preserve any stated reason, minimum interval, or maximum dose.

What does HS mean in a Sig?

HS means at bedtime.

What does AC mean in a Sig?

AC means before meals.

What does PC mean in a Sig?

PC means after meals.