Pre-Colonoscopy Instructions

You can help us ensure your safety during your upcoming colonoscopy by carefully following these instructions:

  1. Overlake Surgery Center requires that you have someone over the age of 18 drive you home. The colonoscopy you undergo and/or the sedatives given to you render you unable to drive due to drowsiness.
  2. Please do not eat or drink anything prior to your scheduled arrival time. It is imperative to follow the “prep” instructions from your physicians office. Patients are limited to clear liquids the entire day before their procedure. You must refrain from those clear liquids for at least 4 hours before arrival. A serious medical condition can occur if these guidelines are not followed and your colonoscopy may be cancelled and rescheduled. Please take any heart or blood pressure medications with a small sip of water early the morning of your procedure.
  3. Please wear loose, comfortable clothing. Please leave all jewelry and valuables at home.
  4. Depending on your medication, you may be asked to stop taking blood thinners prior to your procedure. Please follow your physician’s instructions.
  5. Please make sure to read and follow the instructions carefully from your physician’s office regarding the preparation of your colon and call them if you have any questions.
  6. The day before your colonoscopy, you will receive a call from Overlake Surgery Center informing you of your rights and responsibilities.

If you have any questions, please call Overlake Surgery Center at (425) 709-2500 between 7:00 a.m. and 5:30 p.m. Monday through Friday.

Post-Colonoscopy General Instructions

  1. A mild amount of abdominal gas is common. If you develop severe abdominal pain or shoulder pain, fever, chills or significant rectal bleeding call your physician immediately.
  2. You may resume your diet after the colonoscopy unless otherwise instructed.
  3. You will receive specific written instructions from your physician post procedure.

Post-Sedation Instructions

  1. Do not drive a car or operate machinery or power tools until the next morning.
  2. Do not take tranquilizers or sleeping pills unless specifically ordered by your physician.
  3. Do not drink any alcohol.
  4. Do not sign any legal documents.
  5. Do not assume responsibility in caring for others until you are fully recovered.
  6. Since you may feel dizzy or light-headed from the sedation, and for your own safety, a responsible adult must drive you home.


  • Pain that is unrelieved by medication.
  • Fever over 101 degrees Fahrenheit (38.4 Centigrade).
  • Difficulty breathing or speaking.
  • Questions about your colonoscopy.
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