BID Medical Abbreviation: What Does BID Mean?
Short answer
BID means “twice a day.”
It comes from the Latin bis in die. A label that says “1 tab PO BID” means: take one tablet by mouth, twice a day.
How to take a BID medicine
- Take one dose in the morning and one in the evening, at about the same times each day, for example 8 a.m. and 8 p.m.
- If the label says to take it with food, pair the doses with breakfast and dinner.
- If you take other medicines too, ask your pharmacist which times work best together.
- If you miss a dose, check the leaflet that came with the medicine or ask your pharmacist. Do not take two doses at once unless you are told to.
BID compared with QD, TID, QID and Q12H
| Abbreviation | Meaning | Doses a day | Example times |
|---|---|---|---|
| QD / daily | Once a day | 1 | 8 a.m. |
| BID | Twice a day | 2 | 8 a.m. and 8 p.m. |
| TID | Three times a day | 3 | 8 a.m., 2 p.m. and 8 p.m. |
| QID | Four times a day | 4 | 8 a.m., 12 p.m., 4 p.m. and 8 p.m. |
| Q12H | Every 12 hours | 2 | 8 a.m. and 8 p.m., exactly 12 hours apart |
Example times are only examples. Always follow the directions on your label.
Is BID the same as every 12 hours?
Not exactly. BID means two doses during the day, usually with breakfast and dinner. Q12H means the doses must be 12 hours apart. Many people take BID medicines about 12 hours apart anyway, but if your label says Q12H, keep the timing even.
Make a twice-a-day medication schedule
We set up morning and evening for you. Add your medicine, then print it or download it as PDF, Word or Excel.
Questions people ask
Short, plain answers. Still unsure? Ask your pharmacist.
Related templates
Sources
Written by the Medication List Template team
Last updated October 28, 2026
How we write and check health contentMedication List Template helps you organize your medicines. It is not medical advice. Always follow your doctor's or pharmacist's instructions.