Prepcat (brand name Lafayette) is a barium sulfate suspension for computed tomography examinations of the gastrointestinal (GI) tract. The dosage and application depend on the specific procedure.
UPPER G.I. OPACIFICATION: The patient should drink 300 mL of ready-to-use Prepcat approximately 2 hours before the CT scan and an additional 300 mL approximately 15 minutes prior to examination.
If rapid upper gastrointestinal tract transit is desired, administer the product chilled.
TOTAL BOWEL OPACIFICATION: The patient should drink 300 mL the night preceding the examination, 300 mL two hours prior to the examination and 300 mL approximately 15 minutes prior to examination.

Baro-Cat® is a barium sulfate suspension for use as an aid for computed tomography of the gastrointestinal tract. The contrast medium contains additional pineapple-banana flavor suspending agents, simethicone, potassium sorbate, citric acid, sorbitol, artificial sweetener and water.
Individual technique will determine the suspension quantity and specific procedure used. For computed tomography of the upper gastrointestinal tract should the patient drink 300 mL Baro-Cat® approximately 2 hours before and an additional 300 mL approximately 15 minutes prior to the CT scan. For total bowel opacification the patient should drink additional 300 mL the night before the examination. If rapid transit is desired, administer the suspension chilled. Rectally administered the contrast agent should be at room temperature to body temperature.

Cheetah® is a barium sulfate suspension for use as an aid for computed tomography of the gastrointestinal tract. The contrast medium contains additional pineapple-banana flavor suspending agents, simethicone, potassium sorbate, citric acid, sorbitol, artificial sweetener and water. Individual technique will determine the suspension quantity and specific procedure used. For computed tomography of the upper gastrointestinal tract should the patient drink 200-300 mL Cheetah® approximately 30-45 minutes before and an additional 200-300 mL approximately 5-10 minutes prior to the CT scan.
For total bowel opacification an additional 250-450 mL dose of Cheetah® may be given the evening before the examination. Approximately 1-2 hours before the examination should the patient drink 250-450 mL and 5-10 minutes before the CT scan another 250-450 mL. If rapid transit is desired, the suspension can be administered chilled. Rectally use of the contrast agent should be at room temperature to body temperature.

E-Z-CAT Dry is a dry CT barium contrast powder for suspension and can be mixed and self-administered at home. This may improve examination throughput, reduces patient waiting time and help to minimize waiting room congestion. The light E-Z-Cat® Dry foil packets can also be mailed to patients in remote locations.
The oral contrast agent is well compatible with new scanner technologies and provides a fast transit time through the GI tract.

Gastrografin® is a water-soluble iodinated radiopaque contrast agent for x-ray examinations of the esophagus, stomach, proximal small intestine, colon and is also used for bowel visualization in abdominal computer tomograms.
The high opacification and delineation after oral or rectal administration is caused by a low absorption of the intact gastrointestinal tract. However, visualization of the distal small bowel is generally unsatisfactory, since the hypertonicity of the medium causes intraluminal diffusion of water with subsequent dilution.