QID (Four Times Daily)
A prescription abbreviation from Latin "quater in die," directing a medication to be administered four times a day, approximately every 6 hours.
💬 In Plain English
QID stands for "quater in die," which means four times a day. When this appears on a pet’s medication label (most commonly for antibiotic eye drops, artificial tears, or short-acting liquid stomach medications like sucralfate), the medicine should be given roughly every 6 hours during waking hours (e.g., morning, noon, evening, and bedtime). Spacing the doses evenly keeps continuous medication at the site of infection or ulceration.
🔬 Clinical & Technical Depth
For Vets & TechniciansFormal Clinical Definition
Pharmacological administration frequency abbreviation derived from Latin "quater in die" (four times daily). Target dosing interval is roughly every 6 hours (q6h).
Why Veterinarians Use It
Veterinarians prescribe QID for ophthalmic drops that are rapidly washed away by tears, or mucosal protectants like sucralfate.
Clinical Context Encountered
Found on prescription eye drops for severe corneal ulcers and oral GI protectant suspensions.
Clinical Reference Guide (Prescription / Chart Abbreviation)
Give the medication four times daily, spaced roughly 6 hours apart.
Where You Encounter It
- Ophthalmic eye drops for corneal ulcers
- Gastric protectants (sucralfate)
- Hospital intensive care treatment sheets
- •Never confuse QID (four times daily) with SID (once daily): giving a once-daily drug four times in 24 hours causes severe toxic overdose.
❓ Questions to Ask Your Veterinarian
Take these actionable questions with you to your next clinic visit or appointment:
- 1What practical daytime schedule should I follow for these four doses?
- 2Do I need to wake my pet up in the middle of the night for the fourth dose?
Academic & Clinical References
- Veterinary Medical Abbreviations and Prescription Notation StandardsOrganization: American Animal Hospital Association (AAHA) • Accessed: 2026-01-10https://www.aaha.org