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Zero rules
Include a leading zero, but never a trailing zero
ac
before meals
pc
after meals
daily
every day
bid
two times a day
tid
three times a day
qid
four times a day
qh
every hour
ad lib
as desired
stat
immediately
q2h
every 2 hours
q4h
every 4 hours
q6h
every 6 hours
prn
as needed
hs
at bedtime
PO
by mouth
IM
intramuscularly
PR
per rectum
SubQ
subcutaneously
SL
sublingual
ID
intradermal
GT
gastrostomy tube
IV
intravenous
IVP
intravenous push
IVPB
intravenous piggyback
NG
neogastric tube
tab, tabs
tablet
cap, caps
capsule
gtt
drop
EC
enteric coated
CR
controlled release
susp
suspension
el, elix
elixir
sup, supp
suppository
SR
sustained release
tsp
teaspoon
pt
pint
gal
gallon
oz
ounce
T, tbs, tbsp
tablespoon
qt
quart
g
gram
mg
milligram
mc
microgram
kg
kilogram
L
liter
mL
milliliter
mEq
milliequivalent
Metric conversions
kilo-
hecto-
deca-
base unit
deci-
centi-
milli-
1 kg to lbs
1 kg = 2.2 lbs
1 glass =
8 oz, 240 mL
1 cup
8 oz, 240 mL
1 teacup
6 oz, 180 mL
1 styrofoam cup
6 oz, 180 mL
1 popsicle
3 oz, 90 mL
1 oz to mL
1 oz = 30 mL
1 tbsp to mL
1 tbsp = 15 mL
1 tsp to mL
1 tsp = 5 mL
Intake and output are calculated in
mL
