Sig code: frequency
Q8H medical abbreviation
Q8H means "every 8 hours".
Each meaning matched at least two public references (2 in all for Q8H), checked October 23, 2026. The table lists them.
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What Q8H means
| Meaning | Latin origin | Where used | Checked against |
|---|---|---|---|
| every 8 hours | None | Prescriptions, Medication labels |
Also written: q8h.
Example
Sample label text: "take Q8H."
A made-up line that shows the abbreviation in place. It is not about any patient and is not an instruction.
Related abbreviations
Elsewhere on Rivvi
Questions
What does Q8H mean in medical terms?
Q8H means "every 8 hours".
Where is Q8H used?
Q8H shows up in prescriptions and medication labels. Its category here is sig code: frequency.
Is Q8H on the Joint Commission Do Not Use list?
No. Q8H is not on the Joint Commission Do Not Use list or the ISMP error-prone list as checked on October 23, 2026.