Disease - Conditions

Colonoscopy

What is a Colonoscopy?

A colonoscopy is a procedure that involves the use of a colonoscope (a thin, flexible tube with a camera and a source of light at its tip) to examine the inside of the colon (large intenstine or large bowel). Most often it is done to investigate the cause of blood in the stool, abdominal pain, diarrhea, a change in bowel habit, or an abnormality found on colon X-rays or CT scans.

Individuals with previous history of polyps or colon cancer, as well as individuals with a family history of some types of non-colonic cancers or colonic problems that may be associated with colon cancer, may be advised to have periodic colonoscopies as they may be at greater risk for these dangerous issues.

Open or download this PDF for an illustration and more details concerning colonoscopy.

Minnesota Colonoscopy Surgeon

Contact Bhatti GI today to schedule your colonoscopy. Dr. Ahsan Bhatti has more than 20 years of experience treating patients in Minnesota and has performed over 40,000 procedures.

Colonoscopy Procedure Instructions

Click on a link below for specific instructions.

Download Preparation Instructions

In Preparation:

  • Buy at any pharmacy a one gallon bottle of CoLyte and ONE GREEN bottle of Magnesium Citrate. (NOT RED)
  • Do not take iron for one week prior to your procedure.
  • If you take blood thinners, check with your dosage regulator as to when you should stop taking them. An INR will be needed before your procedure.
  • If Dr. Bhatti did not do a pre-op physical for you at your exam you will need to contact your family physician for that. Your procedure will not be able to be done without it.


1 Day Before Procedure:

  • Have a CLEAR LIQUID diet all day long. No solid food. Clear liquids include Gatorade, carbonated beverages, coffee (no cream), tea, flavored gelatin, ices without milk, popsicles, fruit juices and drinks without pulp, bouillon, broth, honey, sugar, plain hard candy, salt and pepper. NO RED/PURPLE LIQUIDS OR JELLO or Milk or Milk products.
  • Begin drinking the CoLyte at 5:00 PM. and drink an 8 oz. glass every 10-20 minutes over the next 2-4 hours until the ENTIRE gallon is gone. Be sure to take ALL of the CoLyte. The procedure may not be able to be done if the prep is incomplete.
  • Do NOT drink BROTH after starting CoLyte prep.
  • To mix the CoLyte, follow the directions on the bottle.
  • Prep may taste better chilled. This may make you feel cold.
  • You may add Crystal Light (lemon flavor) or sugar-free powdered lemonade mix. Do NOT use mixtures with sugar.
  • Its best to drink each glass quickly rather than drinking small amounts continuously. You may feel bloating and nausea while taking the prep.
  • Thrity minutes after finishing the CoLyte, drink the last GREEN bottle of Magnesium Citrate.
    • You will have many loose bowel movements which should stop by bedtime. The stool should be clear and light tan in color.
    • Any medicine taken within 1 hour of starting to drink the CoLyte will be flushed out of your body by the prep.
  • Continue clear liquids until bedtime. Do NOT drink anything after midnight, including water.
  • If you have any questions please call our office immediately. Please do not wait until the next day as the procedure may not be able to be performed.

Day of Procedure:

  • Plan at least 3 hours total for your procedure.
  • Arrive for your procedure at the scheduled arrival time with a list of your current medications.
  • Your driver must stay until your procedure is done. If this is not pre-arranged, your procedure will need to be rescheduled at a later date to ensure your safety.
  • After the procedure, you will be movied to our recovery area to be evaluated. Expect to feel a little groggy after your procedure.

After the Procedure:

  • If you have a delicate digestive system you MAY want to eat lighter fare than normal for your first few hours after your procedure.
  • Possibly avoid greasy and/or spicy foods until after you put something lighter into your system.
  • Unless otherwise directed, you may resume eating normally.
Download Preparation Instructions

In Preparation:

  • Buy at any pharmacy:
    • 1 Miralax powder (8.3oz/238 grams)
    • 4 Dulcolax tablets
    • 64 oz. Gatorade (NO RED or PURPLE)
  • Stop taking iron one week before the day of your procedure.
  • If you take blood thinners, check with your dosage regulator as to when you should stop taking them. An INR will be needed prior to your procedure.
  • Do NOT stop aspirin if you are taking it for a medical reason. Otherwise, stop taking it one week prior to your procedure.

1 Day Before Procedure:

  • Have a CLEAR LIQUID diet all day long. No solid food.
    • Clear liquids include Gatorade, carbonated beverages, coffee (no cream), tea, flavored gelatin, ices without milk, popsicles, fruit juices and drinks without pulp, bouillon, broth, honey, sugar, plain hard candy, salt and pepper. NO RED/PURPLE LIQUIDS OR JELLO or Milk or Milk products.
  • Mix the entire contents of Miralax powder with Gatorade and refrigerate.
  • Take 4 Dulcolax tablets at 12:00 p.m.
  • Start drinking the Miralax/Gatorade mixture at 5:00 p.m. Drink and 8 oz. glass every 10-12 minutes. Do NOT drink broth after starting to drink the mixture.
  • You may feel bloated and have nausea.
  • Be sure to take ALL of the mixture. Your procedure will not be done if it is incomplete.
  • You will experience frequent loose bowel movements. They should stop around bedtime. Stool should be clear and light tan.
  • Continue clear liquids until bedtime. Do NOT eat or drink anything including water after midnight or 6 hours prior to arrivlal time if your appointment is in the afternoon.

Day of Procedure:

  • Plan at least 3 hours total for your procedure.
  • Arrive for your procedure at the scheduled arrival time with a list of your current medications.
  • Your driver must stay until your procedure is done. If this is not pre-arranged, your procedure will need to be rescheduled at a later date to ensure your safety.
  • After the procedure, you will be movied to our recovery area to be evaluated. Expect to feel a little groggy after your procedure.


After the Procedure:

  • If you have a delicate digestive system you MAY want to eat lighter fare than normal for your first few hours after your procedure.
  • Possibly avoid greasy and/or spicy foods until after you put something lighter into your system.
  • Unless otherwise directed, you may resume eating normally. 
Download Preparation Instructions

In Preparation:

Buy at any pharmacy a one gallon bottle of CoLyte and TWO GREEN bottles of Magnesium Citrate. (NOT RED)
Stop taking iron for one week before the day of the procedure.
You must have a pre-op physical prior to your procedure. If Dr. Bhatti has not done that for you, you will need to visit your family doctor for that.
Your family doctor will also determine which medicines you will need to take and which medicines you can take after your procedure.
If you take blood thinners, check with your doctor as to when you should stop your blood thinner. An INR will be needed before your procedure.
If you take aspirin for a medical reason, DO NOT stop taking it. If you take aspirin but not for a medical reason, stop taking it 7 days before your procedure.

2 Days Before Procedure:

Have a CLEAR LIQUID diet all day long. No solid food. Clear liquids include Gatorade, carbonated beverages, coffee (no cream), tea, flavored gelatin, ices without milk, popsicles, fruit juices and drinks without pulp, bouillon, broth, honey, sugar, plain hard candy, salt and pepper. NO RED/PURPLE LIQUIDS OR JELLO or milk or milk products.
At 5:00 PM drink ONE GREEN bottle of Magnesium Citrate.

1 Day Before Procedure:

  • Have a CLEAR LIQUID diet all day long. No solid food. Clear liquids include Gatorade, carbonated beverages, coffee (no cream), tea, flavored gelatin, ices without milk, popsicles, fruit juices and drinks without pulp, bouillon, broth, honey, sugar, plain hard candy, salt and pepper. NO RED/PURPLE LIQUIDS OR JELLO or Milk or Milk products.
  • Begin drinking the CoLyte at 5:00 PM. and drink an 8 oz. glass every 10-20 minutes over the next 2-4 hours until the ENTIRE gallon is gone. Be sure to take ALL of the CoLyte. The procedure may not be able to be done if the prep is incomplete.
    • Do NOT drink BROTH after starting CoLyte prep.
    • To mix the CoLyte, follow the directions on the bottle.
    • Prep may taste better chilled. This may make you feel cold.
    • You may add Crystal Light (lemon flavor) or sugar-free powdered lemonade mix. Do NOT use mixtures with sugar.
    • Its best to drink each glass quickly rather than drinking small amounts continuously. You may feel bloating and nausea while taking the prep.
  • Thrity minutes after finishing the CoLyte, drink the last GREEN bottle of Magnesium Citrate.
    • You will have many loose bowel movements which should stop by bedtime. The stool should be clear and light tan in color.
    • Any medicine taken within 1 hour of starting to drink the CoLyte will be flushed out of your body by the prep.
  • Continue clear liquids until bedtime. Do NOT drink anything after midnight, including water.
  • If you have any questions please call our office immediately. Please do not wait until the next day as the procedure may not be able to be performed.

Day of Procedure:

  • Plan at least 3 hours total for your procedure.
  • Arrive for your procedure at the scheduled arrival time with a list of your current medications.
  • Your driver must stay until your procedure is done. If this is not pre-arranged, your procedure will need to be rescheduled at a later date to ensure your safety.
  • After the procedure, you will be movied to our recovery area to be evaluated. Expect to feel a little groggy after your procedure.

After the Procedure:

  • If you have a delicate digestive system you MAY want to eat lighter fare than normal for your first few hours after your procedure.
  • Possibly avoid greasy and/or spicy foods until after you put something lighter into your system.
  • Unless otherwise directed, you may resume eating normally.
Download Preparation Instructions

In Preparation:

  • Buy at any pharmacy:
    • 1 Miralax powder (8.3oz/238 grams)
    • 4 Dulcolax tablets
    • 64 oz. Gatorade (NO RED or PURPLE)
    • 1 bottle of Magnesium Citrate (green bottle)
  • Stop taking iron one week before the day of your procedure.
  • You will need a pre-op physical prior to your procedure. If Dr. Bhatti did not do one for you at your exam, you will need to see your family physician for that. Your procedure cannot be done without it.
  • If you take blood thinners, check with your dosage regulator as to when you should stop taking them. An INR will be needed prior to your procedure.
  • DO NOT stop aspirin if you are taking it for a medical reason. Otherwise, stop taking it one week prior to your procedure.

2 Days Before Procedure:

  • Have a CLEAR LIQUID diet all day long. No solid food. (clear liquids include Gatorade, carbonated beverages, coffee (no cream), tea, flavored gelatin, ices without milk, popsicles, fruit juices and drinks without pulp, bouillon, broth, honey, sugar, plain hard candy, salt and pepper. NO RED/PURPLE LIQUIDS OR JELLO or Milk or Milk products.
  • At 5:00 PM drink the bottle of Magnesium Citrate.

1 Day Before Procedure:

  • Have a CLEAR LIQUID diet all day long. No solid food. Clear liquids include Gatorade, carbonated beverages, coffee (no cream), tea, flavored gelatin, ices without milk, popsicles, fruit juices and drinks without pulp, bouillon, broth, honey, sugar, plain hard candy, salt and pepper. NO RED/PURPLE LIQUIDS OR JELLO or Milk or Milk products.
  • Mix the entire contents of Miralax powder with Gatorade and refrigerate.
  • Take 4 Dulcolax tablets at 12:00 p.m.
  • Start drinking the Miralax/Gatorade prep at 5:00 p.m. Drink and 8 oz. glass every 10-12 minutes.
    • Do NOT drink broth after startin prep.
  • You may feel bloated and have nausea.
  • Be sure to take ALL of the prep. Your procedure will not be done if the prep is incomplete.
  • You will experience frequent loose bowel movements. They should stop around bedtime. Stool should be clear and light tan.
  • Continue clear liquids until bedtime. Do not eat or drink anything including water after midnight or 6 hours prior to ARRIVAL time if your appointment is in the afternoon.

Day of Procedure:

  • Plan at least 3 hours total for your procedure.
  • Arrive for your procedure at the scheduled arrival time with a list of your current medications.
  • Your driver must stay until your procedure is done. If this is not pre-arranged, your procedure will need to be rescheduled at a later date to ensure your safety.
  • After the procedure, you will be movied to our recovery area to be evaluated. Expect to feel a little groggy after your procedure.

After the Procedure:

  • If you have a delicate digestive system you MAY want to eat lighter fare than normal for your first few hours after your procedure.
  • Possibly avoid greasy and/or spicy foods until after you put something lighter into your system.
  • Unless otherwise directed, you may resume eating normally. 
Download Preparation Instructions

In Preparation:

  • Buy at any pharmacy 4 Dulcolax tablets, 1 gallon bottle of CoLyte and a 20 mg tablet of Reglan
  • Stop taking iron one week before the day of your procedure.
  • You will need a pre-op physical prior to your procedure. If Dr. Bhatti did not do one for you at your exam you will need to have that done by your family physician. Your procedure cannot be done without this.
  • If you take blood thinners, check with your dosage regulator as to when you should stop taking them. An INR will be needed prior to your procedure.
  • DO NOT stop aspirin if you are taking it for a medical reason. Otherwise, stop taking it one week prior to your procedure.

1 Day Before Procedure:

  • Have a CLEAR LIQUID diet all day long. No solid food. Clear liquids include Gatorade, carbonated beverages, coffee (no cream), tea, flavored gelatin, ices without milk, popsicles, fruit juices and drinks without pulp, bouillon, broth, honey, sugar, plain hard candy, salt and pepper. NO RED/PURPLE LIQUIDS OR JELLO or Milk or Milk products.
  • Take all 4 Dulcolax tablets at 3:00 p.m.   
  • Take Reglan 20 mg tablet at 5:00 pm. This helps the stomach empty to make room for the prep.
  • Begin drinking the CoLyte at 5:00 pm and drink an 8 ounce glass every 10-20 minutes over the next 2-4 hours until the ENTIRE gallon is gone.   
    • Do NOT drink broth after starting prep.
    • To mix the CoLyte, follow the directions on the bottle.
    • Prep may taste better chilled. This may make you feel cold.
    • You may add Crystal Light (lemon flavor) or sugar-free powdered lemonade mix. DO NOT USE MIXTURES WITH SUGAR.Drink the glasses quickly instead of sipping at them. Procedure cannot be done if the prep is incomplete.
  • You may feel bloated and have nausea.
  • You will have many loose bowel movements. The stool should be clear and light tan in color.
  • Continue clear liquids until bedtime.
  • Do NOT eat or drink anything including water after midnight prior to your procedure.

Day of Procedure:

  • Plan at least 3 hours total for your procedure.
  • Arrive for your procedure at the scheduled arrival time with a list of your current medications.
  • Your driver must stay until your procedure is done. If this is not pre-arranged, your procedure will need to be rescheduled at a later date to ensure your safety.
  • After the procedure, you will be movied to our recovery area to be evaluated. Expect to feel a little groggy after your procedure.

After the Procedure:

  • If you have a delicate digestive system you MAY want to eat lighter fare than normal for your first few hours after your procedure.
  • Possibly avoid greasy and/or spicy foods until after you put something lighter into your system.
  • Unless otherwise directed, you may resume eating normally.