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What Does BIW Mean in Medical Terms?
BIW stands for twice a week. Two times weekly.
twice a week
Two times weekly.
Where you will see BIW
You will most often see BIW in medication orders and prescriptions.
Example
A medication order might be written with “BIW” as shorthand for twice a week.
Related abbreviations
- 3% saline — three percent saline (hypertonic)
- 5-FU — fluorouracil
- 6-MP — mercaptopurine
- 6-TG — thioguanine
- 7+3 — seven plus three induction
- a.c. — ante cibum (before meals)
- ABEMA — abemaciclib (chart shorthand)
- ABI — abiraterone (chart shorthand)
Browse the full Medical Abbreviations guide — 5,715 entries, searchable A–Z and by specialty.
Educational reference only. This guide is for learning and quick reference. Abbreviations vary between hospitals, countries and specialties, and some are discouraged because they can be misread. Always write and interpret orders using your own institution’s approved abbreviation list, and check anything unclear with the prescriber or your local policy.