Drug interactions
Dexamethasone-tobramycin + Magnesium chloride
Severity: Minor
Dexamethasone-tobramycin and Magnesium chloride: minor 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 such as tobramycin can cause renal magnesium wasting, leading to hypomagnesemia with systemic use. Magnesium supplementation may offset this, but it is not a harmful interaction. Topical tobramycin has minimal systemic effect.
What this interaction means in plain words
Dexamethasone-tobramycin and Magnesium chloride have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Aminoglycoside-induced renal tubular injury increases urinary magnesium excretion.
What to do
If systemic tobramycin is given, monitor serum magnesium and replace as needed.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Dexamethasone-tobramycin
Frequently asked questions
Can I take Dexamethasone-tobramycin with Magnesium chloride?
MediHelp rates the interaction as minor. Dexamethasone-tobramycin and Magnesium chloride have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Aminoglycosides such as tobramycin can cause renal magnesium wasting, leading to hypomagnesemia with systemic use. Magnesium supplementation may offset this, but it is not a harmful interaction. Topical tobramycin has minimal systemic effect.
How serious is the interaction between Dexamethasone-tobramycin and Magnesium chloride?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: If systemic tobramycin is given, monitor serum magnesium and replace as needed.
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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