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Fasting Before Procedures

Manuela Scotoni, Patrik Feinaigle und Emmanuel Coradi

15. Mar 2026

At the Institute for Interventional Pain Medicine Zurich (IISZ), we perform a variety of procedures—not all of which require fasting. Fasting means refraining from eating or drinking for a set period of time. Your treatment team will explicitly inform you if you need to fast before your procedure. This is primarily required for interventions involving sedation (calming medication) or local anesthesia, to ensure your safety.

Why Fasting Before Certain Procedures?

In some treatments—though rare—stomach contents may enter the lungs (aspiration), which can lead to serious complications. Fasting helps minimize this risk, allowing us to focus entirely on your procedure and perform it under optimal conditions.

Your physician will inform you directly if fasting is required for your procedure.

Clear Fasting Guidelines

If fasting has been ordered for your procedure:

From 6 hours before the procedure:

  • No solid food
  • No milk or dairy products

Up to 2 hours before the procedure, the following are permitted:

  • Water
  • Unsweetened or lightly sweetened tea/coffee (without milk)
  • Carbonated soft drinks
  • Clear fruit juices (without pulp)

Medications: Key Considerations

Unless specifically instructed otherwise by your physician, continue taking all your regular medications as usual with a small sip of water.

Special attention is required for:

  • Blood-thinning medications (e.g., Marcoumar, Xarelto, Rivaroxaban, Eliquis, Clopidogrel)
  • Diabetes medications (particularly insulin)

Please always clarify the intake of these medications individually with your treating physician. Together, we will determine whether and how you should take them before the procedure to ensure both your safety and the success of the treatment.

Your Active Role in Ensuring a Safe Procedure

By following the fasting guidelines and taking your medications correctly, you make an important contribution to a smooth and safe procedure. If you are unsure whether you may eat or drink before your appointment or have questions about your medications, please do not hesitate to contact us. We are here to assist you and ensure your treatment takes place under the best possible conditions.

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