Abbreviations of Time Flashcards
achs
before meals and at bedtime
a.c., ac
before food, before meals
a.m., A.M.
morning
ap
before dinner
ATC
around the clock
b.i.d., bid
twice a day
BT
bedtime
in America, hs or HS is more commonly used for bedtime
CR
controlled-release
DR
delayed-release
ER, XR
extended-release
can also mean emergency room
h, hr
hour, at the hour of
h.s.
at bedtime
hs, HS
at bedtime, hours of sleep
don’t misinterpret as half-strength
IR
immediate-release
MR
modified-release
n, noct
in the night
o.d.
once per day
preferred in the UK, can also mean overdose or right eye, better to spell out
p.c., pc
after food, after meals
p.m., PM
afternoon, evening
p.r.n., prn
as needed
q
each, every
q.d.
every day
q.h.
every hour
q.i.d., qid. QID
four times a day
qod
every other day
stat
immediately
t.i.d., tid
three times a day
TR
timed-release
