Drug interactions
Dexamethasone-tobramycin + Gemifloxacin
Severity: Major
Dexamethasone-tobramycin and Gemifloxacin: major 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
Fluoroquinolones combined with systemic corticosteroids increase the risk of tendinitis and tendon rupture, especially in older patients. The risk is much lower with topical dexamethasone, but the combination is relevant when systemic steroids are used.
What this interaction means in plain words
Dexamethasone-tobramycin and Gemifloxacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Dexamethasone-tobramycin belongs to Anti Bacterial; Gemifloxacin belongs to Anti Bacterial.
Why it happens
Additive tendon toxicity from fluoroquinolone effects on tenocytes and corticosteroid-related collagen impairment.
What to do
Avoid combining where alternatives exist, especially in patients over 60 or with transplants; stop the fluoroquinolone and rest the limb at the first sign of tendon pain.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Dexamethasone-tobramycin
Other interactions of Gemifloxacin
- Arsenic trioxide + Gemifloxacin Contraindicated
- Dofetilide + Gemifloxacin Contraindicated
- Gemifloxacin + Ibutilide Contraindicated
- Gemifloxacin + Pimozide Contraindicated
- Gemifloxacin + Thioridazine Contraindicated
- Gemifloxacin + Vandetanib Contraindicated
Frequently asked questions
Can I take Dexamethasone-tobramycin with Gemifloxacin?
MediHelp rates the interaction as major. Dexamethasone-tobramycin and Gemifloxacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Fluoroquinolones combined with systemic corticosteroids increase the risk of tendinitis and tendon rupture, especially in older patients. The risk is much lower with topical dexamethasone, but the combination is relevant when systemic steroids are used.
How serious is the interaction between Dexamethasone-tobramycin and Gemifloxacin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining where alternatives exist, especially in patients over 60 or with transplants; stop the fluoroquinolone and rest the limb at the first sign of tendon pain.
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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