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MED CLASS
| Term | Definition |
|---|---|
| qd | daily |
| bid | twice daily |
| tid | three times daily |
| qid | four times daily |
| prn | as needed |
| qod | every other day |
| D/C or disc | discontinued |
| w/ | with |
| q | every |
| a | before |
| p | after |
| h or hr | hours |
| c | with |
| qtts | drops |
| pr | rectal |
| ac | before meals |
| s | without |
| pc | after meals |
| po | by mouth/ oral |
| top | topically |
| AD | right ear |
| AS | left ear |
| hs | bedtime/ hours of sleep |
| OS | left eye |
| OD | right eye |
| OU | both eyes |
| Au | Both ears |