Drug interactions
Ciprofloxacin + Conjugated estrogens
Severity: Minor
Ciprofloxacin and Conjugated estrogens: 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
It has been suggested that antibiotics might reduce estrogen exposure by disturbing gut bacteria involved in enterohepatic recycling. For ciprofloxacin, no consistent clinically meaningful drop in estrogen levels has been shown, and the effect is largely theoretical.
What this interaction means in plain words
Ciprofloxacin and Conjugated estrogens 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
Proposed reduction of enterohepatic recirculation of estrogens through altered intestinal flora, which is not well established.
What to do
No routine change is needed for estrogen replacement therapy. Advise patients to report breakthrough bleeding or recurrence of menopausal symptoms.
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
Frequently asked questions
Can I take Ciprofloxacin with Conjugated estrogens?
MediHelp rates the interaction as minor. Ciprofloxacin and Conjugated estrogens have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. It has been suggested that antibiotics might reduce estrogen exposure by disturbing gut bacteria involved in enterohepatic recycling. For ciprofloxacin, no consistent clinically meaningful drop in estrogen levels has been shown, and the effect is largely theoretical.
How serious is the interaction between Ciprofloxacin and Conjugated estrogens?
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 routine change is needed for estrogen replacement therapy. Advise patients to report breakthrough bleeding or recurrence of menopausal symptoms.
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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