Zinc and Moxifloxacin Injection: Interaction Details
AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Moxifloxacin Injection
Zinc
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
What happens
Decreased moxifloxacin effectiveness
Interaction Deep Dive
The coadministration of moxifloxacin and zinc, or any product containing zinc, may result in substantially decreased moxifloxacin absorption, resulting in lower systemic moxifloxacin concentrations. Moxifloxacin should be administered at least four hours before or eight hours after zinc1.
Why it happens (mechanism)
Decreased moxifloxacin absorption due to chelation
Common questions
Can I take Zinc and Moxifloxacin Injection together?
Decreased moxifloxacin effectiveness Always confirm with your pharmacist or prescriber before making any change.
How serious is the Zinc and Moxifloxacin Injection interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "rapid". Effects can appear quickly, often within about 24 hours of combining the drugs.
How strong is the evidence for this interaction?
The evidence is graded "probable". Good supporting evidence, though not definitively proven.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Zinc or Moxifloxacin Injection need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (1)
- Product Information: Avelox(TM), moxifloxacin hydrochloride. Bayer Corporation, West Haven, CT, 2000. DailyMed
Keep reading about Moxifloxacin Injection
Keep reading about Zinc
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