Drug interactions
Dexamethasone + Levofloxacin
Severity: Major
Dexamethasone and Levofloxacin: major interaction.
Last updated Sources: Health Canada product monograph
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 and systemic corticosteroids together increase the likelihood of tendinitis and tendon rupture, most often the Achilles tendon. The risk is greater in older adults, transplant recipients and those on prolonged steroid courses.
What this interaction means in plain words
Dexamethasone and Levofloxacin 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 belongs to Endocrine; Levofloxacin belongs to Anti Bacterial.
Why it happens
Both drugs impair tendon collagen integrity and repair, producing additive tendon toxicity.
What to do
Avoid the combination in older patients or those on long-term steroids when other antibiotics are suitable. Counsel patients to stop levofloxacin and rest at the first sign of tendon pain or swelling.
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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References
Other interactions of Levofloxacin
- Dronedarone + Levofloxacin Contraindicated
- Ibutilide + Levofloxacin Contraindicated
- Levofloxacin + Thioridazine Contraindicated
- Levofloxacin + Vandetanib Contraindicated
- Levofloxacin + Ziprasidone Contraindicated
- Adagrasib + Levofloxacin Major
Other interactions of Dexamethasone
- Bcg vaccine live + Dexamethasone Contraindicated
- Dexamethasone + Mifepristone Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexamethasone + Smallpox vaccine live Contraindicated
- Dexamethasone + Varicella virus vaccine live Contraindicated
- Dexamethasone + Yellow fever vaccine Contraindicated
Frequently asked questions
Can I take Dexamethasone with Levofloxacin?
MediHelp rates the interaction as major. Dexamethasone and Levofloxacin 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 and systemic corticosteroids together increase the likelihood of tendinitis and tendon rupture, most often the Achilles tendon. The risk is greater in older adults, transplant recipients and those on prolonged steroid courses.
How serious is the interaction between Dexamethasone and Levofloxacin?
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 or those on long-term steroids when other antibiotics are suitable. Counsel patients to stop levofloxacin and rest at the first sign of tendon pain or swelling.
What other medicines interact with Levofloxacin?
MediHelp also lists interactions of Levofloxacin with, for example, Dronedarone, Ibutilide, Thioridazine. The full list is on the Levofloxacin page.
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