I have to take a ct scan next week for abdomen and pelvis and need to drink barium sulfate. i am concerned about allergic reactions. are they common ?

No, not for barium sulfate: They are much more common for IV contrast.. Are they going to give it to you? Allergic reactions usually happen to the substances with high molecular weight.

Severe reactions: to Barium Sulfate are very rare, about 1 out of 1,000,000. Minor reactions like cramps or constipation are common and usually resolve quickly. Thanks for trusting HealthTap!