a.c.
antes la comida
before meals
a.m.
morning
p.m.
evening
ad. lib.
as desired
p.r.n.
as needed
b.i.d.
twice a day
q.i.d.
four times a day
h. or hr.
hour
q.2h
every 2 hours
q.12h
every 12 hours
p.c.
despues comida
after meals
h.s.
at bedtime
q.d.
every day
stat
immediately
q.o.d.
every other day
t.i.d.
three times a day
min.
minute
q.h.
every hour
q.8h
every 8 hours
u.d.
as directed