Abbreviations used in the directions
to the patient or instructions to care providers concerning Dose and Dosing
Frequency - The Signa
ad lib., prn
|
use when or as needed. Ex. 1 cap hs prn
sleep
|
a.
|
before
|
a.c.
|
before meals.
Take before meals. Usually used in conjunction with q.d., tid etc.
|
a.m.
|
morning, before midday
|
h.
|
hour
|
d.
|
day
|
q.
|
every
|
q4h
|
every 4 hours, Also specified by the degree
symbol. Ex. q 4deg.
|
q.d.
|
every day, take one dose a day
|
q.o.d.
|
every other day, Take one dose every other
day
|
bid
|
twice a day, Take one dose twice a day. N.B. does not mean every 12 hours. Loosely
means morning and evening.
|
Tid
|
three times a day, NB. Take one dose three times a day. N.B. does not mean very 8 hours. Loosely means morning, evening, and
night.
|
Qid
|
four times a day.
NB. Take one dose four times a
day. N.B. does not mean every 6
hours. Loosely means morning,
afternoon, evening, and night.
|
t.i.w.
|
three times a week, Take a dose three times a week. For example M, W, F (Monday, Wednesday,
Friday)
|
h.s.
|
at bed time.
Take at bedtime
|
ATC
|
around the clock,
Doses administered at equal time intervals. Ex: q. 6 h. ATC.
|
m2, M2
|
square meter
|
BSA
|
body surface area
|
p.
|
after
|
p.c.
|
after meals.
Take after meals. Usually used
in conjunction with q.d., bid, tid etc.
|
p.m.
|
evening, afternoon, after midday
|
noct.
|
night
|
STAT
|
immediately, give at once
|
s.o.s.
|
if there is need.
Administer again if required. Example: MS 2 mg IV STAT and q 30 min s.o.s. bucking
ventilator
|
To see more abbreviations used in prescription click on the respective links, given below:
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