Drug interactions
Magnesium citrate + Tobramycin
Severity: Minor
Magnesium citrate and Tobramycin: 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
Tobramycin can cause renal tubular injury with magnesium wasting and hypomagnesemia. Occasional laxative use of magnesium citrate is unlikely to be altered meaningfully, but magnesium status should be considered during extended aminoglycoside courses.
What this interaction means in plain words
Magnesium citrate and Tobramycin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Magnesium citrate belongs to Gastrointestinal Tract; Tobramycin belongs to Anti Bacterial.
Why it happens
Aminoglycoside-induced tubular dysfunction increases renal magnesium excretion.
What to do
Monitor serum magnesium, potassium and calcium during prolonged tobramycin therapy and replace deficits. No change is needed for occasional laxative use.
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 Magnesium citrate
- Ciprofloxacin + Magnesium citrate Major
- Baloxavir marboxil + Magnesium citrate Moderate
- Bictegravir + Magnesium citrate Moderate
- Cabotegravir + Magnesium citrate Moderate
- Cholecalciferol + Magnesium citrate Moderate
- Deferiprone + Magnesium citrate Moderate
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 Magnesium citrate with Tobramycin?
MediHelp rates the interaction as minor. Magnesium citrate and Tobramycin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Tobramycin can cause renal tubular injury with magnesium wasting and hypomagnesemia. Occasional laxative use of magnesium citrate is unlikely to be altered meaningfully, but magnesium status should be considered during extended aminoglycoside courses.
How serious is the interaction between Magnesium citrate and Tobramycin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor serum magnesium, potassium and calcium during prolonged tobramycin therapy and replace deficits. No change is needed for occasional laxative use.
What other medicines interact with Magnesium citrate?
MediHelp also lists interactions of Magnesium citrate with, for example, Ciprofloxacin, Baloxavir marboxil, Bictegravir. The full list is on the Magnesium citrate page.
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