Abbreviation | Meaning |
bid | Twice per day |
tid | Three times per day |
qid | Four times per day |
q (e.g., q8h) | Every (e.g., every 8 hours) |
PRN | As needed |
IM | Intramuscular |
IV | Intravenous |
Subcut | Subcutaneously |
SL | Sublingual |
PO | By mouth |
NPO | Nothing by mouth |
pc | After meals |
ac | Before meals |