Which of the following is the correct interpretation of "Sig: 1 tab PO q.

Breaking Down the SIG Code:"Sig: 1 tab PO q.i.d. p.c. & h.s."

Abbreviation

Meaning

1 tab

Take one tablet

PO

By mouth (oral route)

q.i.d.

Four times daily

p.c.

After meals (post cibum)

h.s.

At bedtime (hora somni)

"Take one tablet by mouth four times daily after meals and at bedtime."✅

(A) Take one tablet by mouth five times daily with meals and at bedtime.❌Incorrect – "q.i.d." means four times daily, not five.

(B) Take one tablet by mouth four times daily without meals and at bedtime with a snack.❌Incorrect – "p.c." meansafter meals, not without meals.

(C) Take one tablet by mouth four times daily before meals and at bedtime.❌Incorrect – "p.c." meansafter meals, not before.

(D) Take one tablet by mouth four times daily after meals and at bedtime.✅Correct – Matches the SIG interpretation.

ISMP List of Common SIG Codes and Abbreviations:https://www.ismp.org

PTCB Exam Content Outline – Prescription Interpretation & SIG Code Reading

Putting It Together:Analysis of Answer Choices:References for Pharmacy Technicians: