Drug interactions
Dexamethasone-neomycin-polymyxin + Moxifloxacin
Severity: Major
Dexamethasone-neomycin-polymyxin and Moxifloxacin: 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 given with systemic corticosteroids increase the risk of tendinitis and tendon rupture. Older age and long treatment raise the risk further.
What this interaction means in plain words
Dexamethasone-neomycin-polymyxin and Moxifloxacin 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-neomycin-polymyxin belongs to Anti Bacterial; Moxifloxacin belongs to Anti Bacterial.
Why it happens
Additive tendon toxicity from fluoroquinolone effects on tenocytes and corticosteroid impairment of collagen synthesis.
What to do
Avoid the combination in older patients where an alternative antibiotic exists. Discontinue moxifloxacin 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-neomycin-polymyxin
- Dexamethasone-neomycin-polymyxin + Ketorolac Major
- Dexamethasone-neomycin-polymyxin + Lapatinib Major
- Dexamethasone-neomycin-polymyxin + Levofloxacin Major
- Dexamethasone-neomycin-polymyxin + Mifepristone Major
- Aldesleukin + Dexamethasone-neomycin-polymyxin Moderate
- Allogeneic cultured keratinocytes / fibroblasts in bovine collagen + Dexamethasone-neomycin-polymyxin Moderate
Other interactions of Moxifloxacin
- Amiodarone + Moxifloxacin Contraindicated
- Arsenic trioxide + Moxifloxacin Contraindicated
- Disopyramide + Moxifloxacin Contraindicated
- Dofetilide + Moxifloxacin Contraindicated
- Dronedarone + Moxifloxacin Contraindicated
- Droperidol + Moxifloxacin Contraindicated
Frequently asked questions
Can I take Dexamethasone-neomycin-polymyxin with Moxifloxacin?
MediHelp rates the interaction as major. Dexamethasone-neomycin-polymyxin and Moxifloxacin 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 given with systemic corticosteroids increase the risk of tendinitis and tendon rupture. Older age and long treatment raise the risk further.
How serious is the interaction between Dexamethasone-neomycin-polymyxin and Moxifloxacin?
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 the combination in older patients where an alternative antibiotic exists. Discontinue moxifloxacin at the first sign of tendon pain.
What other medicines interact with Dexamethasone-neomycin-polymyxin?
MediHelp also lists interactions of Dexamethasone-neomycin-polymyxin with, for example, Ketorolac, Lapatinib, Levofloxacin. The full list is on the Dexamethasone-neomycin-polymyxin page.
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