Question 1
A medication order reads "1 tablet PO QID." How often should the patient take the medication?
- Once a day
- Four times a day
- Every other day
- Every 4 hours
Show answer and explanation
Correct answer: B. Four times a day
QID means four times a day. It is different from q4h (every 4 hours), which would be six doses in 24 hours.
Why the other options are wrong
- A. Once a day: Once a day is written out as "daily."
- C. Every other day: Every other day must be written out; QOD is prohibited.
- D. Every 4 hours: Every 4 hours is q4h, which is 6 doses a day.
Sources
- Appendix B: Some Common Abbreviations · U.S. National Library of Medicine (MedlinePlus)
- Facts About the Official "Do Not Use" List of Abbreviations (jointcommission.org refused by the environment proxy on 2026-10-21 and 2026-10-22; list contents and scope confirmed from the ISMP 2021 list, where ** marks TJC entries, and the official TJC table reproduced in PMC3005872) · The Joint Commission
- ISMP List of Error-Prone Abbreviations, Symbols, and Dose Designations (2021) · Institute for Safe Medication Practices (ISMP)
- A randomized-controlled trial of computerized alerts to reduce unapproved medication abbreviation use (Table 1: Official "Do Not Use" List of Abbreviations from the Joint Commission) · Journal of the American Medical Informatics Association, via PubMed Central (NLM)