If you're preparing for surgery, you've probably been told not to eat or drink after a certain time. But does that include water?
The answer depends on when you drink it. Many patients are allowed to drink small amounts of plain water up until a few hours before surgery, while others may need to stop earlier. Your surgeon or anesthesia team will give you specific fasting instructions based on your procedure and medical history.
Quick Summary
- Many patients can drink small amounts of plain water until a few hours before surgery.
- Follow your surgeon's fasting instructions exactly, even if they differ from general guidelines.
- Water is different from coffee, juice, milk, and other beverages.
- If you're taking approved morning medications, you may be instructed to take them with a small sip of water.
- If you accidentally drink water after your fasting cutoff, contact your surgical team.
Can I Drink Water Before Surgery?
Often, yes—but only until the time specified by your surgical team.
Many anesthesia guidelines allow healthy patients to drink clear liquids, including plain water, until a few hours before surgery. However, every patient is different.
Your fasting instructions may depend on:
- The type of surgery you're having
- The type of anesthesia you'll receive
- Your medical history
- Whether you have conditions such as diabetes or delayed stomach emptying
For a complete overview of fasting instructions, read When Should I Stop Eating and Drinking Before Surgery?
Why Is Water Sometimes Allowed?
Unlike food or drinks containing milk, sugar, or fat, plain water moves through the stomach relatively quickly.
Allowing water before surgery may help prevent dehydration and make patients more comfortable while still maintaining anesthesia safety.
Even so, it's important to stop drinking water when your surgical team instructs you to.
Does Water Count as a Clear Liquid?
Yes.
Plain water is considered a clear liquid.
Other beverages may also be considered clear liquids in certain situations, but you should only drink them if your surgical team specifically says they're allowed.
When in doubt, choose plain water and follow the instructions you've been given.
Can I Drink Water With My Morning Medications?
Many patients are instructed to take certain medications with a small sip of water on the morning of surgery.
Do not stop or continue medications without guidance from your surgeon or the healthcare professional managing your medications.
If you're unsure which medications to take, contact your surgical team before your procedure.
What If I Accidentally Drink Water After My Cutoff Time?
Don't panic.
Call your surgeon's office or surgery center as soon as possible.
Depending on:
- How much water you drank
- When you drank it
- What type of surgery you're having
...your healthcare team will let you know whether it's safe to proceed as planned.
Being honest about what happened is always the safest approach.
What About Coffee, Juice, or Sports Drinks?
These beverages are not treated the same as plain water.
Coffee, milk, juice with pulp, protein drinks, and other beverages usually have different fasting rules.
Learn more in Can I Drink Coffee Before Surgery?
The Bottom Line
Many patients can safely drink small amounts of plain water until a few hours before surgery, but your surgeon's instructions always take priority.
Following your fasting instructions carefully helps reduce anesthesia risks and avoid unnecessary surgery delays.
Before leaving for the hospital, review What to Expect on Surgery Day and Can I Brush My Teeth Before Surgery so you know exactly what to expect that morning.
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