Microcat (Barium Sulfate)

Microcat is a gastrointestinal contrast agent used to enhance X‑ray imaging of the digestive tract.

• Barium swallow: enables detailed visualization of the esophagus and pharynx during fluoroscopic examination.
• Barium meal: provides radiopaque coating of the stomach and duodenum for upper gastrointestinal series.
• Gastrointestinal radiography: outlines the entire intestinal tract to detect structural abnormalities such as strictures, masses or motility disorders.

• Barium sulfate contains a high atomic number element that absorbs X‑ray photons, creating a radiopaque image. After oral administration, the suspension coats the mucosal surface of the gastrointestinal tract without systemic absorption. The dense barium layer attenuates X‑ray beams, producing a clear contrast between the lumen and surrounding tissues, which allows radiologists to assess anatomy and pathology during imaging studies.

Microcat may cause mild to moderate adverse reactions, most of which resolve without intervention.

Common Side Effects

• Nausea: transient feeling of sickness after ingestion.
• Abdominal cramping: mild to moderate discomfort in the stomach area.
• Constipation: delayed bowel movements following the procedure.
• Taste disturbance: temporary metallic or chalky taste in the mouth.

Serious or Rare Side Effects

• Allergic reaction: rash, itching, swelling, or anaphylaxis in susceptible individuals.
• Aspiration: inhalation of the suspension leading to respiratory distress.
• Bowel obstruction or perforation: rare but severe complications requiring immediate medical attention.

Before using Microcat, consider the following safety measures.

• Assess for gastrointestinal obstruction: avoid if known blockage exists.
• Evaluate allergy history: do not use in patients with prior barium sulfate hypersensitivity.
• Avoid in recent gastrointestinal surgery or perforation: risk of leakage.
• Ensure adequate hydration: helps prevent constipation after the study.
• Store at below 25°C: keep in the original packaging, protect from moisture and direct sunlight.

Barium sulfate can affect the absorption of certain oral medications.

Major Interactions (Avoid)

• Co‑administration with iodine‑based oral contrast agents: may cause precipitation and reduce imaging quality.

Moderate Interactions (Monitor Closely)

• Thyroid hormone (levothyroxine), iron supplements, tetracycline or fluoroquinolone antibiotics: barium may bind these drugs and diminish their absorption; separate dosing by at least four hours.
• Oral antacids containing aluminum or magnesium: may interfere with barium coating effectiveness.
• Vitamin D or calcium supplements: potential binding reducing bioavailability.