a.c.
Before meals
a.d.
Right ear
a.s.
Left ear
a.u.
Each ear
ad lib
As tolerated
b.i.d.
Twice a day
FUP
Follow-up
GTT
Drops
HS, h.s.
bedtime
M.R.
May repeat
N.R.
Do not repeat, no repeats
NMT
Not more than
NPO
Nothing by mouth
o.d.
Right eye
o.l., o.s.
Left eye
o.u.
Both eyes
p.c.
After meals
p.r.n.
As needed, when necessary
Q, q.
Every
q.d.
Every day
q.i.d.
Four times a day
q.o.d.
Every other day
q.s., qs.
A quantity sufficient
Rx
Prescription symbol