| Mask |
Monitor patch |
| Mouthwash |
Needle |
| Nurse |
O.D. - Omni Die [Daily] |
| O.M. - Omni Mane [Only Morning] |
O.N. - Omni Nocte [Every Night] |
| O.T [Operation Theatre] |
Ointment |
| P.C. - Post Cibos [After Meals] |
Pharmacist |
| Powder |
PRN - Pro Re Nata [As needed] |
| Q.I.D. -Quater In Die [Four Times a Day] |
Q.Q.H. - Quater Quaque Hora [Every Four Hours] |
| S.O.T [Sub Operation Theater] |
Sachet |
| Scrub |
Solution |
| SOS - Si Opus Sit [If Necessary] |
Spray |
| START - Start Immediately |
Sterile water |
| Suction apparatus |
Suction catheter |
| Surgeon cap |
Suture |
| Syringe |
Syrup |