Drug interactions
Dexamethasone-tobramycin + Magnesium supplement
Severity: Moderate
Dexamethasone-tobramycin and Magnesium supplement: 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
Aminoglycosides and magnesium both impair neuromuscular transmission, and combined use may cause enhanced weakness or respiratory depression. The risk is greatest with parenteral magnesium or high doses and with impaired renal function.
What this interaction means in plain words
Dexamethasone-tobramycin and Magnesium supplement 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 neuromuscular blockade through reduced presynaptic acetylcholine release.
What to do
Monitor respiratory function and neuromuscular status when giving parenteral magnesium with systemic tobramycin, and check magnesium levels and renal function.
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 Dexamethasone-tobramycin
Frequently asked questions
Can I take Dexamethasone-tobramycin with Magnesium supplement?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Magnesium supplement 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. Aminoglycosides and magnesium both impair neuromuscular transmission, and combined use may cause enhanced weakness or respiratory depression. The risk is greatest with parenteral magnesium or high doses and with impaired renal function.
How serious is the interaction between Dexamethasone-tobramycin and Magnesium supplement?
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 respiratory function and neuromuscular status when giving parenteral magnesium with systemic tobramycin, and check magnesium levels and renal function.
What other medicines interact with Dexamethasone-tobramycin?
MediHelp also lists interactions of Dexamethasone-tobramycin with, for example, Capreomycin, Carboplatin, Ciprofloxacin. The full list is on the Dexamethasone-tobramycin page.
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