Update 2025-2026
NPO - Answers nothing by mouth
qhs - Answers at bedtime
qid - Answers four times a day
bid - Answers twice a day
OU - Answers both eyes
Sl - Answers sublingual
gtt - Answers drop
OS - Answers left eye
q4h - Answers every 4 hours
AD - Answers right ear
q2h - Answers every 2 hours
Stat - Answers immediately
AU - Answers both ears
OD - Answers right eye
NKA - Answers no known allergies
PR - Answers per rectum
tid - Answers three times a day
AC - Answers before meals
D/C - Answers discontinue
qod - Answers every other day
PRN - Answers as needed
PC - Answers after meals
AS - Answers left ear
qd - Answers every day