Abbreviation Meaning
bid twice daily
BTD breakthrough dose
g gram
h hour
HS bedtime
IV intravenous
kg kilogram
L litre
mcg microgram
mg milligram
min minute
mL millilitre
PO by mouth
PR rectally
prn as needed
qAM every morning
q1h every hour
q4h every 4 hours
q6h every 6 hours
qid 4 times a day
SC subcutaneous
SL sublingual
stat immediately
tab tablet
tid 3 times a day

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