Common Medical Abbreviations

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Abbreviation Description Abbreviation Description
ID Intradermal PRN As Needed
IM Intramuscular OTC Over the Counter
IV Intravenous STAT Immediately
IVPB Intravenous Piggyback Abx Antibiotics
PO By Mouth CTx Chemotherapy
SC Subcutaneous Dx Diagnosis
SL Sublingual Hx History
NG Nasogastric Tube Rx Prescription
TPN Total Parenteral Nutrition RTx Radiotherapy
Q1H Every Hour S/S Signs & Symptoms
Q2H Every 2 Hours Thx Therapyl
Q3H Every 3 Hours Tx Treatment
Q4H Every 4 Hours Px Prognosis
QHS Before Bedtime CC Cubic Centimeter (1 cc = 1 ml)
QOD Every Other Day G Grams
ATC Around the Clock Mg Milligram
BID Twice a Day Ml Milliliters
OD Once Daily Oz Ounces (1 oz = 30 ml)
QID 4 Times a Day Tbsp Tablespoon (1 tbsp = 15 ml)
TID 3 Times a Day Tsp Teaspoon (1 tsp = 5 ml)
AC Before Meals LLQ Left Lower Quadrant
PC After Meals LUQ Left Upper Quadrant
RLQ Right Lower Quadrant
RUQ Right Upper Quadrant