Before Having This Test

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, test results may be affected by other things. For barium sulfate, the following should be considered:

Allergies—Tell your doctor if you have ever had any unusual or allergic reaction to barium sulfate. Also, tell your doctor if you are allergic to any other substances, such as foods, preservatives, or dyes.

Pregnancy—X-rays of the abdomen are usually not recommended during pregnancy. This is to avoid exposing the fetus to radiation. Be sure you have discussed this with your doctor.

Breast-feeding—Barium sulfate does not pass into the breast milk. This medicine has not been reported to cause problems in nursing babies.

Children—Although there is no specific information comparing use of barium sulfate in children with use in other age groups, this agent is not expected to cause different side effects or problems in children than it does in adults.

Older adults—This contrast agent has been used in older people and has not been shown to cause different side effects or problems in them than it does in younger adults.

Other medical problems—The presence of other medical problems may affect the use of barium sulfate. Make sure you tell your doctor if you have any other medical problems, especially:

• Asthma, hay fever, or other allergies (history of)—If you have a history of these conditions, the risk of having a reaction, such as an allergic reaction to the additives in the barium sulfate preparation, is greater

• Cystic fibrosis—The risk of blockage in the small bowel is greater

• Dehydration—Barium sulfate may cause severe constipation

• Intestinal blockage or perforation—Barium sulfate may make this condition worse

Preparation for This Test

Your doctor may have special instructions for you in preparation for your test. If you have not received such instructions or if you do not understand them, check with your doctor in advance.

For some tests your doctor may tell you not to eat after 8 the evening before the test. You may be allowed to drink small amounts of clear liquids until midnight; however, check first with your doctor. For other tests you may need to eat meals free of fiber and bulk the day before the test. You may also need to use a laxative.