Drug interactions
Ciprofloxacin + Vitamin k1
Severity: Minor
Ciprofloxacin and Vitamin k1: 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
Antibiotics that disrupt gut flora may reduce bacterial production of vitamin K, but this is of little consequence in patients taking phytonadione. The effect is theoretical and unlikely to reduce vitamin K1 activity meaningfully.
What this interaction means in plain words
Ciprofloxacin and Vitamin k1 have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Ciprofloxacin belongs to Anti Bacterial; Vitamin k1 belongs to Cardiovascular.
Why it happens
Theoretical reduction of intestinal bacterial vitamin K production through alteration of gut flora.
What to do
No action is needed beyond awareness; monitor INR if the patient is also taking warfarin.
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 Ciprofloxacin
- Agomelatine + Ciprofloxacin Contraindicated
- Ciprofloxacin + Fezolinetant Contraindicated
- Ciprofloxacin + Thioridazine Contraindicated
- Ciprofloxacin + Tizanidine Contraindicated
- Ciprofloxacin + Vandetanib Contraindicated
- Alosetron + Ciprofloxacin Major
Other interactions of Vitamin k1
- Vitamin k1 + Warfarin Major
- Cholestyramine + Vitamin k1 Moderate
- Colestipol + Vitamin k1 Moderate
- Ketorolac intranasal + Vitamin k1 Moderate
- Mineral oil + Vitamin k1 Moderate
- Orlistat + Vitamin k1 Moderate
Frequently asked questions
Can I take Ciprofloxacin with Vitamin k1?
MediHelp rates the interaction as minor. Ciprofloxacin and Vitamin k1 have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Antibiotics that disrupt gut flora may reduce bacterial production of vitamin K, but this is of little consequence in patients taking phytonadione. The effect is theoretical and unlikely to reduce vitamin K1 activity meaningfully.
How serious is the interaction between Ciprofloxacin and Vitamin k1?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No action is needed beyond awareness; monitor INR if the patient is also taking warfarin.
What other medicines interact with Ciprofloxacin?
MediHelp also lists interactions of Ciprofloxacin with, for example, Agomelatine, Fezolinetant, Thioridazine. The full list is on the Ciprofloxacin page.
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