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medical terminology
chapter 2: timing abbreviations
| Term | Definition |
|---|---|
| BID | twice daily, from the Latin phrase bis in die, which means "two in a day." |
| TID | three times daily, from the Latin phrase ter in die, which means "three in a day." |
| Q | every x, example Q4hr would mean every 4 hours or Q3 would be every 3 days. |
| QD | daily, from the Latin phrase quaque die, which means "each day." |
| QID | four times daily, from the Latin phrase quater in die, which means "four in a day." |
| QHS | at night, from the Latin phrase quaque hora somni, which means "each night at the hour of sleep." |
| AC | before meals, from the Latin phrase ante cibum, which means "before food." |
| PC | after meals, form the Latin phrase post cibum, which means "after food." |
| prn | as needed, from the Latin phrase per re nata, which means "as the need arises." |
| ad lib | as desired |