Drug interactions
Gentamicin + Magnesium sulfate
Severity: Moderate
Gentamicin and Magnesium sulfate: 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
Gentamicin increases renal magnesium loss, which may blunt replacement therapy. In addition, parenteral magnesium sulfate and aminoglycosides both impair neuromuscular transmission, so combined use may enhance muscle weakness or respiratory depression.
What this interaction means in plain words
Gentamicin and Magnesium sulfate 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
Aminoglycoside-induced renal magnesium wasting plus additive neuromuscular blockade at the junction.
What to do
Monitor serum magnesium and watch for muscle weakness or respiratory depression when giving parenteral magnesium. Adjust magnesium dosing to measured levels and monitor 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 Gentamicin
- Cidofovir + Gentamicin Contraindicated
- Adefovir + Gentamicin Major
- Amikacin + Gentamicin Major
- Amlodipine-hydrochlorothiazide-valsartan + Gentamicin Major
- Amphotericin b deoxycholate + Gentamicin Major
- Amphotericin b + Gentamicin Major
Frequently asked questions
Can I take Gentamicin with Magnesium sulfate?
MediHelp rates the interaction as moderate. Gentamicin and Magnesium sulfate 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. Gentamicin increases renal magnesium loss, which may blunt replacement therapy. In addition, parenteral magnesium sulfate and aminoglycosides both impair neuromuscular transmission, so combined use may enhance muscle weakness or respiratory depression.
How serious is the interaction between Gentamicin and Magnesium sulfate?
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 magnesium and watch for muscle weakness or respiratory depression when giving parenteral magnesium. Adjust magnesium dosing to measured levels and monitor renal function.
What other medicines interact with Gentamicin?
MediHelp also lists interactions of Gentamicin with, for example, Cidofovir, Adefovir, Amikacin. The full list is on the Gentamicin page.
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