Drug interactions
Tobramycin + Trimagnesium
Severity: Moderate
Tobramycin and Trimagnesium: 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
Magnesium and aminoglycosides each impair neuromuscular transmission. Together they may cause additive weakness and rarely respiratory paralysis, especially with high magnesium exposure or renal impairment.
What this interaction means in plain words
Tobramycin and Trimagnesium 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 pharmacodynamic neuromuscular blockade through reduced presynaptic acetylcholine release.
What to do
Monitor muscle strength and respiratory status and check magnesium levels and renal function. Avoid unnecessary high-dose magnesium during tobramycin therapy.
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 Tobramycin
- Cidofovir + Tobramycin Contraindicated
- Adefovir + Tobramycin Major
- Amikacin + Tobramycin Major
- Amphotericin b deoxycholate + Tobramycin Major
- Amphotericin b + Tobramycin Major
- Atracurium + Tobramycin Major
Frequently asked questions
Can I take Tobramycin with Trimagnesium?
MediHelp rates the interaction as moderate. Tobramycin and Trimagnesium 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. Magnesium and aminoglycosides each impair neuromuscular transmission. Together they may cause additive weakness and rarely respiratory paralysis, especially with high magnesium exposure or renal impairment.
How serious is the interaction between Tobramycin and Trimagnesium?
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 muscle strength and respiratory status and check magnesium levels and renal function. Avoid unnecessary high-dose magnesium during tobramycin therapy.
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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