Final answer:
The medical abbreviations tid, bid, qid, and prn stand for 'three times per day,' 'two times per day,' 'four times per day,' and 'when needed/as necessary,' respectively.
Step-by-step explanation:
The abbreviations you've listed are commonly used in medical prescriptions to indicate the frequency with which a medication should be taken. Here is the correct matching of each abbreviation with its meaning:
- tid - three times per day
- bid - two times per day
- qid - four times per day
- prn - when needed/as necessary
These abbreviations are part of the 'Sig' codes that healthcare providers use in prescriptions.