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Generic Name: iohexol (Oral route)


Commonly used brand name(s)

In the U.S.

  • Oraltag

Available Dosage Forms:

  • Powder for Solution

Therapeutic Class: Radiological Non-Ionic Contrast Media

Uses For Oraltag

Iohexol is used to help find problems in the bowels during a CT scan of the stomach and pelvis. It is an iodinated contrast agent. Contrast agents are used to create a clear picture of the different parts of the body during certain medical procedures.

This medicine is to be given only by or under the supervision of your doctor.

Before Using Oraltag

In deciding to use a diagnostic test, any risks of the test must be weighed against the good it will do. This is a decision you and your doctor will make. Also, other things may affect test results. For this test, the following should be considered:


Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.


Appropriate studies performed to date have not demonstrated pediatric-specific problems that would limit the usefulness of iohexol in children.


Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of iohexol in the elderly. Elderly patients are more likely to have age-related liver, kidney, or heart problems, which may require caution and an adjustment in the dose for patients receiving iohexol.

Breast Feeding

Studies in women suggest that this medication poses minimal risk to the infant when used during breastfeeding.

Interactions with Medicines

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are receiving this diagnostic test, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Receiving this diagnostic test with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Acebutolol
  • Amiodarone
  • Atenolol
  • Betaxolol
  • Bisoprolol
  • Carteolol
  • Carvedilol
  • Celiprolol
  • Esmolol
  • Labetalol
  • Levobunolol
  • Metipranolol
  • Metoprolol
  • Nadolol
  • Nebivolol
  • Oxprenolol
  • Penbutolol
  • Pindolol
  • Practolol
  • Propranolol
  • Sotalol
  • Timolol

Interactions with Food/Tobacco/Alcohol

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other Medical Problems

The presence of other medical problems may affect the use of this diagnostic test. Make sure you tell your doctor if you have any other medical problems, especially:

  • Allergic rhinitis or
  • Bronchial asthma—May increase risk for allergic reaction to occur again.

Proper Use of Oraltag

A doctor or other trained health professional will give you or your child this medicine in a hospital. It is given by mouth. You will swallow the prepared oral liquid just before a CT scan.

Protect the prepared oral liquid from light and direct exposure to sunlight.

Precautions While Using Oraltag

Your doctor will check you or your child's progress closely while you are receiving this medicine. This will allow your doctor to see if the medicine is working properly and to decide if you or your child should continue to receive it.

This medicine may cause a serious allergic reaction, called anaphylaxis, which can be life-threatening and requires immediate medical attention. Tell your doctor right away if you have a rash, itching, hoarseness, trouble breathing, trouble swallowing, or any swelling of your hands, face, or mouth after receiving this medicine.

Before you have any medical tests, tell the medical doctor in charge that you are receiving this medicine. The results of some tests may be affected by this medicine.

Oraltag Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur:

Incidence not known
  • Diarrhea
  • fever
  • joint or muscle pain
  • nausea
  • numbness or tingling of the face, hands, or feet
  • redness and soreness of the eyes
  • skin rash
  • sores in the mouth
  • stomach pain
  • swelling of the feet or lower legs
  • vomiting

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

See also: Side effects (in more detail)

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