Drug interactions
Mannitol + Tobramycin
Severity: Major
Mannitol and Tobramycin: major interaction.
Last updated
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
Mannitol, an osmotic diuretic, can injure renal tubules and reduce clearance of tobramycin, raising aminoglycoside exposure. This increases the risk of nephrotoxicity and ototoxicity.
What this interaction means in plain words
Mannitol 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.
Mannitol belongs to Cardiovascular; Tobramycin belongs to Anti Bacterial.
Why it happens
Additive nephrotoxicity and reduced renal aminoglycoside clearance, with osmotic diuresis possibly adding to ototoxicity.
What to do
Avoid concurrent use where possible; if needed, monitor renal function, hydration status and tobramycin levels, and watch for hearing or balance symptoms.
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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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
Other interactions of Mannitol
Frequently asked questions
Can I take Mannitol with Tobramycin?
MediHelp rates the interaction as major. Mannitol 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. Mannitol, an osmotic diuretic, can injure renal tubules and reduce clearance of tobramycin, raising aminoglycoside exposure. This increases the risk of nephrotoxicity and ototoxicity.
How serious is the interaction between Mannitol 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: Avoid concurrent use where possible; if needed, monitor renal function, hydration status and tobramycin levels, and watch for hearing or balance symptoms.
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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