Drug interactions
Mannitol + Tobramycin inhaled
Severity: Moderate
Mannitol and Tobramycin inhaled: moderate 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
Intravenous mannitol is an osmotic diuretic that can itself injure the kidney, and aminoglycosides are nephrotoxic and ototoxic. Inhaled tobramycin has low systemic absorption, but exposure can rise in patients with impaired renal function, so the combination may add to renal and cochlear risk.
What this interaction means in plain words
Mannitol and Tobramycin inhaled can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive nephrotoxicity from osmotic nephrosis and aminoglycoside tubular toxicity, with reduced aminoglycoside clearance if renal function declines.
What to do
Monitor serum creatinine, urine output and tobramycin levels when systemic exposure is likely. Avoid the combination in patients with pre-existing renal impairment where possible.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Mannitol
Frequently asked questions
Can I take Mannitol with Tobramycin inhaled?
MediHelp rates the interaction as moderate. Mannitol and Tobramycin inhaled can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Intravenous mannitol is an osmotic diuretic that can itself injure the kidney, and aminoglycosides are nephrotoxic and ototoxic. Inhaled tobramycin has low systemic absorption, but exposure can rise in patients with impaired renal function, so the combination may add to renal and cochlear risk.
How serious is the interaction between Mannitol and Tobramycin inhaled?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor serum creatinine, urine output and tobramycin levels when systemic exposure is likely. Avoid the combination in patients with pre-existing renal impairment where possible.
What other medicines interact with Mannitol?
MediHelp also lists interactions of Mannitol with, for example, Dexamethasone-tobramycin, Tobramycin, Dichlorphenamide. The full list is on the Mannitol page.
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