OD
right eye/Doctor of Optometry
OS
left eye
OB/GYN
obstetrician/gynecologist
OCD
OCPs
OH
Oint -
ointment
OP
OR
ORIF
OTC
OU
each eye
P
pulse
p.c.
after meals
p.o.
by mouth
p.r.n.
as needed
P1
first live birth delivery
PAD
peripheral artery disease
PAP
Papanicolaou test