t , tsp
teaspoon
T , tbs
tablespoon
c
cup , celsius
pt
pint , patient
qr
quart
gal
gallon
F
fahrenheit , Female
po , per os
by mouth
prn
as needed , as necessary
pr
per rectum
pulv
powder , pulverine
q
every
qd
every day
qh
every hour
q2h
every 2 hours
qm
every morning
qn
every night
qod
every other day
qs
quantity sufficient
R
rectal , respiration
Rx
"take thou" prescription
S , Sig
give the following directions
_
s
without
Sc , subc , subq
subcutaneous
_
ss
one half
stat
immediately
tid
3 times a day