Niopam (Iopamidol)

• Iopamidol is a non‑ionic iodinated contrast medium used to improve X‑ray based imaging studies.
• Angiography: provides high‑contrast visualization of blood vessels for diagnostic and interventional procedures.
• Arthrography: enhances joint space imaging to assess cartilage, ligaments and intra‑articular pathology.
• Myelography: improves spinal canal and nerve root visualization during contrast‑enhanced studies.
• CT imaging with contrast: increases tissue differentiation for detailed cross‑sectional images in abdominal, thoracic and vascular assessments.

• Iopamidol contains iodine atoms with high atomic number, which absorb X‑rays more effectively than surrounding tissues. When administered intra‑arterially, intra‑articularly, or intrathecally, the solution distributes within the vascular or body cavity, raising local X‑ray attenuation and creating a contrast between structures. This enhanced attenuation allows radiologists to differentiate anatomical details on fluoroscopy, digital subtraction angiography, arthrography, myelography and contrast‑enhanced CT scans.

Iopamidol may cause a range of adverse reactions, most of which are mild and transient.

Common Side Effects

• Warm sensation or flushing at the injection site.
• Mild nausea or vomiting.
• Headache or dizziness.
• Transient metallic taste.
• Mild itching or rash.
• Temporary increase in blood pressure.

Serious or Rare Side Effects

• Severe allergic reactions (anaphylaxis) with respiratory distress.
• Acute kidney injury, especially in patients with pre‑existing renal impairment.
• Cardiac arrhythmias or hypotension.
• Seizures or neurological disturbances.
• Pulmonary edema.
• Persistent skin necrosis at the injection site.

• Use of Iopamidol requires careful assessment of patient risk factors and adherence to handling guidelines.
• Renal function assessment: evaluate baseline kidney function before administration.
• Allergy history: screen for prior reactions to iodinated contrast agents.
• Hydration status: ensure adequate patient hydration to reduce nephrotoxicity risk.
• Concurrent nephrotoxic drugs: avoid or monitor use of other agents that may impair renal function.
• Store at 2‑8°C: keep refrigerated, protect from light, do not freeze or shake the solution.

Iopamidol can interact with other medications, influencing safety and efficacy.

Major Interactions (Avoid)

• Concurrent use of high‑dose metformin in patients with impaired renal function (risk of lactic acidosis).
• Combination with other iodinated contrast agents within 24 hours (cumulative iodine load).

Moderate Interactions (Monitor Closely)

• Use with nephrotoxic drugs such as aminoglycosides or NSAIDs (enhanced renal risk).
• Concurrent administration of beta‑blockers (may mask contrast‑induced hypertension).
• Interaction with thyroid‑affecting drugs (potential for iodine‑induced thyroid dysfunction).