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Common Sig Codes
| Sig | Meaning |
|---|---|
| aa, aa | of each |
| ac | before meals |
| ad | to, up to |
| ad lib | as desired |
| a.m., AM | morning |
| amt | amount |
| aq | water |
| bid, BID | twice a day |
| bin | twice a night |
| C | with |
| cap, caps | capsule |
| comp | compound |
| d | day |
| dil | dilute |
| disp | dispense |
| elix | elixir |
| hr, h | hour |
| h.s. | before sleep, at bedtime |
| IM | intramuscular |
| inj, INJ | inject |
| IV | intravenous |
| Liq | liquid |
| mixt | mixture |
| noct, noc | at night |
| non rep | do not repeat, no refills |
| NPO | nothing by mouth (nulla per os) |
| oint | ointment |
| pc | after meals |
| per | through or by |
| p.m., PM | afternoon |
| po, PO | by mouth |
| PR | through the rectum |
| prn, PRN | as needed |
| pulv, PULV | Powder |
| q | Every |
| q2h | every 2 hours |
| qh | every hour |
| gid, QID | four times a day |
| QN | every night |
| qs, qv | as much as you wish (sufficient quantity) |
| S | without (sine) |
| sig | write on label |
| sol | solution |
| SOS | if necessary |
| Sp | spirits |
| stat | immediately |
| supp | suppository |
| syr | syrup |
| tab | tablet |
| tid, TID | three times a day |
| top | topically |
| tr, tinct | tincture |
| Vo, V/O | verbal order |
| x | multiplied by |