When Should I Stop Eating and Drinking Before Surgery?

One of the most common questions before surgery is:

"When do I need to stop eating and drinking?"

Your surgeon or anesthesia team will provide specific instructions based on your procedure and medical history, but most patients are asked to stop eating and drinking for a period of time before surgery.

Following these instructions is important for your safety during anesthesia.

If you are unsure about your fasting instructions, contact your surgical team before surgery day.

Many patients find it helpful to understand more on how to prepare for surgery to feel confident ahead of surgery.

Quick Summary

Why Do Patients Need to Fast Before Surgery?

When anesthesia is used, the body's normal protective reflexes may be reduced.

If food or liquid remains in the stomach, there is a risk that stomach contents could move into the lungs during anesthesia.

Fasting instructions are designed to help reduce this risk and improve patient safety.

Will Everyone Receive the Same Instructions?

No.

Fasting instructions may vary depending on:

Always follow the instructions provided by your healthcare team rather than relying on general advice online. Some procedures may require pre-operative testing that may require fasting as well.

Can I Drink Water Before Surgery?

Many patients receive specific instructions regarding water and other clear liquids.

However, recommendations vary.

Do not assume that water is allowed without confirming your instructions.

Your surgical team will tell you exactly when to stop drinking before surgery.

What Happens If I Accidentally Eat or Drink?

If you accidentally eat or drink after your instructed cutoff time, contact your surgeon or surgical facility as soon as possible.

In some cases, surgery may need to be delayed for safety reasons.

Do not hide this information from your healthcare team.

Their goal is to keep you safe.

What About Medications?

Some medications should still be taken before surgery.

Others may need to be stopped.

Your surgeon, anesthesiologist, or healthcare team will provide instructions regarding your medications.

If you are uncertain, ask before surgery day.

How Can I Prepare for Fasting?

Many patients find it helpful to:

Planning ahead can help reduce stress on surgery day.

Even after fasting begins, many patients can still brush their teeth before surgery as long as they do not swallow water.

Common Mistakes to Avoid

Avoid:

When questions arise, contact your surgical team.

Eating after your fasting deadline is one of the most common reasons surgery is delayed. Learn about the other common surgery day mistakes to avoid before your procedure.

Want a simple way to stay on track?

Preparing for surgery involves a lot of small but important steps. Download the free SurgiNav Surgery Prep Checklist to stay organized and feel more confident before your procedure.

The Most Important Rule

The most important rule is simple:

Follow the instructions provided by your surgeon and anesthesia team.

Those instructions are tailored to your procedure and health history and should always take priority over general information.

FAQ

Why can't I eat before surgery?

Fasting helps reduce the risk of stomach contents entering the lungs during anesthesia.

Can I drink water before surgery?

Some patients can drink water up to a certain time before surgery, but recommendations vary. Always follow your specific instructions.

What happens if I accidentally eat before surgery?

Contact your surgeon or surgical facility immediately. Surgery may need to be delayed depending on the circumstances.

Do fasting rules vary by procedure?

Yes. Instructions may differ based on the procedure, anesthesia, and individual medical factors.

Who should I contact if I am unsure?

Contact your surgeon, anesthesia team, or surgical facility before surgery day.

Related Guides

Feel Ready for Surgery

Preparing for surgery can feel overwhelming, but you don't have to remember every detail on your own. Download the free SurgiNav Surgery Prep Checklist to stay organized, avoid common mistakes, and feel more confident before surgery day.

Download the Free Surgery Prep Checklist

Medical Disclaimer

This article provides general educational information and is not a substitute for medical advice. Always follow the instructions provided by your healthcare team.

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Educational information only. Always follow your surgeon's instructions.