We must Know these Abbreviation > Rx = Treatment. > Hx = History > Dx = Diagnosis > qd = Every day > qod = Every other day > qh = Every Hour > SOS = If needed > AC = Before Meals > PC = After meals > BID = Twice a Day > TID = Thrice a Day > QID = Four times a day > OD = Once a Day > BT = Bed Time > BBF = Before Breakfast > BD = Before Dinner > Tw = Twice a week > SQ = sub cutaneous > IM = Intramuscular > ID = Intradermal > IV = Intravenous > QAM = (every morning) > QPM (every night) > Q4H = (every 4 hours) > HS = (at bedtime) > PRN = (as needed) > Mg = (milligrams) > Mcg/ug = (micrograms) > G or Gm = (grams) > 1TSF ( Teaspoon) = 5 ml > 1 Tablespoonful =15ml *Kindly Share this Useful Information With* *Everyone.*