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Frequency
Pharmacy SIG Codes and Terminology
| Term | Definition |
|---|---|
| ac | Before meals |
| am | Morning |
| atc | Around the clock |
| bid | Twice a day |
| h | Hour |
| hs | At bedtime |
| pc | After food or after meals |
| pm | Afternoon or evening |
| prn | As needed |
| q | each or every |
| q10h | Every ten hours |
| q12h | Every twelve hours |
| q2h | Every two hours |
| q4h | Every four hours |
| q6h | Every six hours |
| q8h | Every eight hours |
| qd | Every day |
| qh | Every hour |
| qid | Four times a day |
| qod | Every other day |
| Stat. | Immediately |
| tid | Three times a day |
| prf | as needed for |
| swag | Shake well and give |
| swat | Shake well and take |