MajorX-ray contrast media. Watersoluble nephrotropic low-osmolar iodinated agents×Biguanides. Oral antihyperglycemic agents
Updated · Methodology
Mechanism
Intravenous iodinated contrast media (iopromide) can cause acute kidney injury via osmotic load and direct toxicity. On metformin (renally excreted), plasma levels rise and lactic acidosis risk accumulates – a rare but life-threatening complication.
Symptoms
Lactic acidosis: dyspnoea, muscle pain, nausea, confusion, hypotension. Laboratory: blood pH below 7.35 and lactate above 5 mmol/L. Symptoms appear 1–3 days after contrast.
Management
For planned contrast studies, withhold metformin on the day of the procedure. Resume 48 hours later only with stable renal function (creatinine check before resuming). Alternative imaging in renal impairment: non-gadolinium MRI.
Check the full regimen, not just this pair
Opens the checker with these two drugs prefilled. Add the rest of the regimen and recompute additive risks.
Summary of a multi-drug list →
Medicine list: everything you take in one place →
Sources
- ACR: ACR Manual on Contrast Media (2024)
- AEMPS: Ficha técnica Dianben 850 mg comprimidos recubiertos con película (metformina) (2025)– AEMPS, CIMA, nº registro 55211, revisión 03/2025, secciones 4.4 y 4.5
- AEMPS: Ficha técnica Ultravist 370 mg/ml solución inyectable y para perfusión (iopromida) (2026)– AEMPS, CIMA, nº registro 59614, revisión 08/2026, secciones 4.4 y 4.5
- FDA: Ultravist (iopromide) injection – Prescribing Information (2026)– FDA, DailyMed SPL, Bayer HealthCare, раздел 7.1