OTC
over the counter
as needed
p.r.n
b.i.d
twice a day
intravenous
i.v
p.c
after meals
ad. lib
as much as desired
intramuscular
i.m
q.i.d
4 times a day
by mouth/orally
p.o
rectally
p.r
every day
q.d
before meals
a.c
every day at bedtime
q.h.s
4 times a day
q.i.d
subcutaneous
SC
SQ
SubQ
p.r.n
as needed
SL
s.l
sublingually
q.d
every day
t.i.d
3 times a day
a.c
before meals
i.v
intravenous
after meals
p.c
twice a day
b.i.d
over the counter
OTC