qhs
every night at bedtime
qid
four times a day
qns
quantity not sufficient
qs
quantity sufficient
qt
quart
R
respiration, rectal
®, Rt
right
Ra
radium
RHIT
Registered Health Information Technician
RBC
red blood cell
RDA
recommended daily allowance
REM
rapid eye movement
RHD
rheumatic heart disease
RLQ
right lower quadrant
RN
registered nurse
RNA
ribonucleic acid
R/O
rule out
RO
reality orientation
ROM
range of motion
RR
recovery room
RRT
registered respiratory therapist, registered radiologic technologist
RT
respiratory therapy/therapist
RUQ
right upper quadrant
Rx
prescription, take, treatment