Drug interactions
Calcium citrate + Dexamethasone-tobramycin
Severity: Minor
Calcium citrate and Dexamethasone-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
Corticosteroids reduce intestinal calcium absorption and increase urinary calcium loss, which can reduce the benefit of calcium supplements over prolonged use. Tobramycin does not meaningfully affect calcium absorption.
What this interaction means in plain words
Calcium citrate and Dexamethasone-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.
Why it happens
Glucocorticoids decrease intestinal calcium absorption and increase renal calcium excretion.
What to do
No action is needed for short courses. With long-term systemic steroids, maintain calcium and vitamin D intake and monitor bone density.
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 Calcium citrate with Dexamethasone-tobramycin?
MediHelp rates the interaction as minor. Calcium citrate and Dexamethasone-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. Corticosteroids reduce intestinal calcium absorption and increase urinary calcium loss, which can reduce the benefit of calcium supplements over prolonged use. Tobramycin does not meaningfully affect calcium absorption.
How serious is the interaction between Calcium citrate and Dexamethasone-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: No action is needed for short courses. With long-term systemic steroids, maintain calcium and vitamin D intake and monitor bone density.
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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