Common Medical
Abbreviations 
NPO |
Nothing by mouth |
BID |
Twice a day |
| TID | Three times a day |
| QID | Four times a day |
| BP | Blood Pressure |
| VS | Vital Signs |
| PRN | As necessary or as needed |
| Ad Lib | As desired |
| Gtt | Drop |
| SOB | Shortness of Breath |
| HOB | Head of the bed |
| CVA | Stroke |
| MI | Myocardial Infarction (heart attack) |
| CAD | Coronary Artery Disease |
| ac | Before meals |
| pc | After meals |
| c | with |
| s | without |
| q | every |
| qd | every day |
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