The Short Version
The 2-4-6-8 rule.
This is the ASA guideline used in most U.S. outpatient settings. Your facility may apply something stricter — and if it does, the facility rule is what governs your day.
ASA · Updated 2023
Clear liquids
Water, pulp-free juice, black coffee or tea, clear sodas, Gatorade or Powerade (not red, not purple), clear broth.
Breast milk
Infants only.
A light meal, infant formula, or non-human milk
Includes coffee with cream and non-dairy creamers (oat, almond, soy).
A fatty, fried, or meat-heavy meal
Heavier meals empty the stomach more slowly. Allow extra time when in doubt.
What Counts As "Clear"
If you can't read a newspaper through it, it's not clear.
A rough patient shorthand — and the one most schedulers fall back on when a specific drink is in question.
Clear
- Water
- Pulp-free apple or white grape juice
- Plain black coffee or tea
- Clear sodas — Sprite, 7UP, Ginger Ale
- Clear broth, plain Jell-O
- Gatorade or Powerade
Not clear
- Coffee with milk or cream
- Smoothies or anything with pulp
- Milk of any kind
- Orange juice, tomato juice
- Yogurt, cream-based soups
- Alcohol — excluded by ASA
The Local Reality
Two facilities, two sets of instructions.
That isn't an error. It's how different systems publish different safety rules — and your printed instructions always win.
Strictest on paper
BayCare
Mease Countryside · Morton Plant · North Bay · Wesley Chapel · Trinity Surgery Center
“Do not eat or drink anything, including water, after midnight the night before your surgery.”
ASA-aligned
AdventHealth GI
Wesley Chapel · Zephyrhills · North Pinellas
“Clear liquids up to 2 hours before your arrival time.”
Mixed
HCA Florida
Bayonet Point · Trinity · Largo · Northside
"Nothing after midnight," with named exceptions for cardiac, blood pressure, thyroid, seizure, and pain medications taken with a sip of water. The actual sheet comes from your surgeon's office.
Per-center
Independent surgery centers
Set their own instructions
Follow the sheet you were given. If you can't find it, call your scheduler before procedure morning.
Pulled from each Pasco and Pinellas system's published patient documents, May 2026.
Reading the rules is one part of procedure day. Showing up at 5:30 a.m. as the responsible adult listed at check-in is another.
- FL AHCA HCS Registered · Registration No. 241656
- Insured & Background-Checked
- Pasco & Pinellas Counties only
- Local, owner-operated
Medications
Medications that commonly change fasting instructions.
Some medications require special handling before sedation or anesthesia. The important part is not memorizing a hold schedule — it's making sure your procedure team knows you take them.
These are commonly reviewed before anesthesia. Your care team decides if any adjustments are needed:
If you slipped
Don’t hide it. Don’t reschedule yourself.
If you drank coffee with cream at 4 a.m., took a medication you weren’t supposed to, or forgot a GLP-1 hold — the move is the same.
Timing matters more than perfection.
They decide whether the case proceeds, delays, or moves. The worst outcomes here come from patients who were too embarrassed to mention what they had.
In most cases, small deviations don’t automatically cancel a procedure — the care team will usually adjust timing or instructions.