PAC
Premature Atrial Contraction
PEDS
Pediatrics
PERRL
Pupils Equal, Round, And Reactive To Light
PMHX
Past Medical History
PND
Post Nasal Drainage And Paroxysmal Nocturnal Dyspnea
PNS
Peripheral Nervous System
PO
By Mouth
POSTOP
Post-Operative
PPD
Packs Per Day
PREOP
Before Surgery
Before Surgery
PREOP
PRN
As Needed
As Needed
PRN
PT
Patient
PUD
Peptic Ulcer Disease
PVC
Premature Ventricular Contraction
Q
Every
Every
Q
Q2H
Every 2 hours
Q3H
Every 3 hours
Every 4 hours
Q4H
QD
Every day
Every day
QD