1
Q
a.c.
A
before meals
2
Q
ad lib
A
as desired, as much as needed
3
Q
bib
A
drink
4
Q
b.i.d.
A
twice a day
5
Q
fl
A
fluid
6
Q
h.s.
A
at bedtime, at the hours of sleep
7
Q
p.c.
A
after meals
8
Q
p.o.
A
by mouth
9
Q
p.r.n.
A
whenever necessary or as needed
10
Q
q.
A
every
11
Q
q.d.
A
every day
12
Q
q.h.
A
every hour
13
Q
q.2.h.
A
every 2 hours
14
Q
q.4.h.
A
every 4 hours
15
Q
q.i.d.
A
four times a day
16
Q
q.s.
A
sufficient quality
17
Q
Rx
A
take, treatment, prescription
18
Q
t.i.d.
A
three times daily
19
Q
2X
A
twice
20
Q
1X
A
once
21
Q
:
A
ratio
