q.d.
every day/daily
b.i.d.
twice daily
t.i.d.
three times daily
q.i.d.
four times daily
q.o.d.
every other day
q.”x”.h. (q12h)
every 12 hours
q.am
every morning
q.pm
every evening
q.h.s.
every night at bedtime
p.r.n
as needed
a.c.
before meals
p.c.
after meals
o.d.
right eye
o.s.
left eye
o.u.
both eyes
a.d.
right ear
a.s.
left ear
a.u.
both ears
gtt
drops
p.o.
by mouth
s.l.
sublingually (under the tongue)
i.v.
intravenously
i.m.
intramuscularly
s.q.
subcutaneously