OC
Oral Contraceptive
OJ
orange juice
OTC
over-the-counter
oz.
ounce
P
pulse ,pain, percussion, plan,pressure
p or per
by or through
p or post
after
p.c.
after meals
p.m.
Evening or afternoon
p.r.n
as needed
PPD
By or through
PPM
Permanent pacemaker
pr
By rectum
PT
Physical Therapy
pt.
patient
pulv.
powder
q
every
q AM
Every morning
q.d.
Every day
q.h.
Every hour