Barium, which is also referred to as Barium sulfate suspension, allows the inside of the esophagus, stomach, or intestines to be seen more clearly during X-rays and CT scan. By coating the gastrointestinal tract with a material that is not absorbed into the body, Barium helps diagnose the disorders that affect it by making it easy “for the diseased or damaged areas to be clearly seen by x-ray examination or CT scan”. According to drugs.com, the patient may not be able to use Barium if they recently had surgery involving their stomach, esophagus, or intestines, or if they had radiation treatment of their pelvic area. Besides, pregnant women should by all means avoid X-rays and CT scans, because they may harm an unborn baby. So, if you’re pregnant, you need to let your doctor know before using Barium. It is worth noting that this drug comes in liquid forms, tablets, cream, or paste. Plus, it is either taken by mouth or used as a rectal enema. As for its side effects, they include mild stomach cramps, nausea and vomiting – All of which are considered common. However, you will need to call your doctor if you have severe stomach pain, diarrhea, constipation, ringing in your ears, or if your heart starts beating at a fast pace.