Drug interactions
Fennel + Levofloxacin
Severity: Minor
Fennel and Levofloxacin: 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
Fennel is a herbal product that may contain minerals and fiber that could bind levofloxacin in the gut. Any reduction in absorption is poorly documented and probably small.
What this interaction means in plain words
Fennel and Levofloxacin 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
Possible binding of levofloxacin in the gastrointestinal tract; not well characterized.
What to do
Take levofloxacin at least 2 hours before fennel supplements as a precaution.
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 Levofloxacin
- Dronedarone + Levofloxacin Contraindicated
- Ibutilide + Levofloxacin Contraindicated
- Levofloxacin + Thioridazine Contraindicated
- Levofloxacin + Vandetanib Contraindicated
- Levofloxacin + Ziprasidone Contraindicated
- Adagrasib + Levofloxacin Major
Frequently asked questions
Can I take Fennel with Levofloxacin?
MediHelp rates the interaction as minor. Fennel and Levofloxacin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Fennel is a herbal product that may contain minerals and fiber that could bind levofloxacin in the gut. Any reduction in absorption is poorly documented and probably small.
How serious is the interaction between Fennel and Levofloxacin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Take levofloxacin at least 2 hours before fennel supplements as a precaution.
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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