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polyethylene glycol (PEG)
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CoLyte
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Powder for Oral Solution
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GoLYTELY
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Powder for Oral Solution
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This drug is not available in a generic form.
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What is polyethylene glycol?
PEG is a solution that stays within the intestinal tract.
It is not absorbed. It acts to keep fluid in the gut,
thereby flushing and cleansing it. The solution is primarily
sodium sulfate which acts to keep the sodium from being
absorbed. Therefore, people on sodium restricted diets can
use this product.
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What is it used for?
PEG is used to cleanse the lower GI tract prior to
colonoscopy (an endoscopic exam of the colon) and barium
enema. It has also been used in modified form for severe,
hard to manage constipation and, in children, when excessive
iron medicine overdose has occurred.
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How do I take it?
Follow your physician's instructions carefully. Do not
add flavorings or other ingredients to the solution. Do not
eat solid food for 3 to 4 hours prior to drinking the
solution. Drink 8 ounces every 10 minutes until all 4 liters
(1 gallon) are consumed. Drinking each portion rapidly is
better than drinking small amounts continuously. The first
bowel movement should occur in approximately 1 hour.
Continue drinking until watery stool is clear and free of
solid matter.
To prepare: Add tap water to make 4 liters (1 gallon).
Refrigerate to improve taste. Use within 48 hours.
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Are there interactions with other drugs?
An interaction generally means that one drug may increase
or decrease the effect of another drug. Also, the more
medications a person takes, the more likely there will be a
drug interaction. Oral medication taken within 1 hour of
this product may be flushed through the GI tract and not
absorbed. Check with your physician or nurse.
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Are there interactions with food or beverages?
The combined use of acetaminophen and alcohol should be
avoided to prevent the possibility of severe liver damage.
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Are there interactions with other drugs?
An interaction generally means that one drug may increase
or decrease the effect of another drug. Also, the more
medications a person takes, the more likely there will be a
drug interaction.
Interactions with this drug may occur with the following:
- cholestyramine (Questran)
- isoniazid (Rifater)
- phenytoin (Dilantin)
- blood thinners (Coumadin)
- zidovudine (Retrovir)
- birth control pills
- non-steroidal anti-inflammatory drugs-commonly called
NSAIDs
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Is there a problem if I have another disorder or
disease?
At times, a drug may have a different or enhanced effect
when other diseases are present. At other times, the drug
may worsen or effect another disease. Patients with severe
ulcerative colitis or congestive heart failure should
discuss its use with their physician. Generally, this
product can be used with almost any other medical condition.
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What about allergies?
People who have known allergies or asthma may be at an
increased risk for a reaction from any new medication. The
physician should always know a patient's allergy history.
Signs of an allergic reaction are itching, runny nose and
skin rash. Of course, a person should not take polyethylene
glycol if there has been a previous reaction to this or a
similar drug.
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What if I'm pregnant, considering pregnancy or
breast-feeding?
Most females now know that, if possible, no drug,
including alcohol, should be taken during pregnancy or
lactation. The potential danger, of course, is an injury to
the baby. However, some drugs are much safer than others in
this regard. So, the FDA has a grading system for each drug
which reflects what is known medically. It ranks drugs from
A, where medical studies show no evidence for danger to the
fetus or mother, to B, C, D and X, where the medical
evidence indicates that the risk to the fetus outweighs any
benefit to the mother. Polyethylene glycol is ranked C.
Always consult your physician before taking any drug during
or when planning pregnancy.
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How about side effects?
Adverse reactions can occur with any drug, even
over-the-counter medications. Minor reactions may go away on
their own but if they persist, contact the physician. For
major reactions, the patient should contact the physician
immediately.
For polyethylene glycol, the following are the observed
side effects:
Minor:
- nausea
- abdominal fullness
- bloating
- cramps
- vomiting
- chills
- anal irritation
Major:
- severe bloating
- distention
- abdominal pain
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A physician's comment...
PEG is an excellent method of cleansing the colon. The
cleaner the colon, the better the endoscopic exam. Remember,
the product must be taken as instructed. If you have trouble
swallowing it or keeping it down, contact your physician or
hospital immediately for instructions.
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Posted: July 1998
Colonoscopy
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