*Common Medical Abbreviations* > *Rx* = prescription > *Hx* = History > *Dx* = Diagnosis > *q* = Every > *qd* = Every day > *qod* = Every other day > *qh* = Every Hour > *S* = without > *SS* = One & half > *C* = With > *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 > *hs* = Bed Time > *BBF* = Before Breakfast > *BD* = Before Dinner > *Tw* = Twice a week > *SQ* = sub cutaneous > *IM* = Intramuscular > *ID* = Intradermal > *IV* = Intravenous > *Q4H* = (every 4 hours) > *QOD* = (every other day) > *HS* = (at bedtime) > *PRN* = (as needed) > *PO or "per os"* (by mouth) > *Mg* = (milligrams) > *Mcg/ug* = (micrograms) > *G or Gm* = (grams) > *1TSF* (Teaspoon) = 5 ml > *1 Tablespoonful* =15ml ~ *DDx* =differential Diagnosis *Tx* =Treatment *RTx* =Radiotherapy *CTx* =Chemotherapy *R/O* =rule out *s.p* =status post *PMH(x)* =post medical history *Px* =Prognosis *Ix* =Indication *CIx* =contraindication *Bx* =biopsy *Cx* =complication...