p - after
pc - after meals
pc & hs - after meals and at bedtime
pm - afternoon
ad lib - as desired
u.d. - as directed
prn - as needed
ad lib - as much as needed
ASAP - as soon as possible
hs - at bedtime
ac - before meals
ac & hs - before meals and at bedtime
AU - both ears
OU - both eyes
po / PO - by mouth (orally)
qd / QD - daily
DAW - dispense as written
DS - double strength
q / Q - every
qd / QD - every day
qhs / QHS - every day at bedtime