Drug interactions
Contrast media + Tobramycin
Severity: Major
Contrast media and Tobramycin: major interaction.
Last updated Sources: US FDA label
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Iodinated contrast can cause contrast-associated kidney injury, and tobramycin is itself nephrotoxic. Together the risk of acute kidney injury rises, which can lead to higher tobramycin levels and greater ototoxicity.
What this interaction means in plain words
Contrast media and Tobramycin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive tubular toxicity and renal hemodynamic effects, with reduced tobramycin clearance as renal function falls.
What to do
Ensure adequate hydration and check baseline renal function before contrast. Monitor serum creatinine and tobramycin levels afterward, and delay non-urgent contrast in high-risk patients.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Tobramycin
- Cidofovir + Tobramycin Contraindicated
- Adefovir + Tobramycin Major
- Amikacin + Tobramycin Major
- Amphotericin b deoxycholate + Tobramycin Major
- Amphotericin b + Tobramycin Major
- Atracurium + Tobramycin Major
Frequently asked questions
Can I take Contrast media with Tobramycin?
MediHelp rates the interaction as major. Contrast media and Tobramycin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Iodinated contrast can cause contrast-associated kidney injury, and tobramycin is itself nephrotoxic. Together the risk of acute kidney injury rises, which can lead to higher tobramycin levels and greater ototoxicity.
How serious is the interaction between Contrast media and Tobramycin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Ensure adequate hydration and check baseline renal function before contrast. Monitor serum creatinine and tobramycin levels afterward, and delay non-urgent contrast in high-risk patients.
What other medicines interact with Tobramycin?
MediHelp also lists interactions of Tobramycin with, for example, Cidofovir, Adefovir, Amikacin. The full list is on the Tobramycin page.
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