Drug interactions
Demeclocycline + Estradiol
Severity: Minor
Demeclocycline and Estradiol: 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
Tetracyclines were once thought to reduce enterohepatic recycling of estrogens through gut flora changes. Studies have generally not shown meaningful decreases in estrogen levels, so clinical significance is doubtful.
What this interaction means in plain words
Demeclocycline and Estradiol 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 in gut bacterial deconjugation and enterohepatic recirculation of estrogens; poorly supported.
What to do
No routine action is needed. Counsel patients to report breakthrough bleeding, and consider a backup method if estradiol is used for contraception.
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 Estradiol
- Anastrozole + Estradiol Contraindicated
- Estradiol + Fezolinetant Contraindicated
- Estradiol + Ospemifene Contraindicated
- Antithrombin alfa + Estradiol Major
- Antithrombin iii + Estradiol Major
- Estradiol + Exemestane Major
Frequently asked questions
Can I take Demeclocycline with Estradiol?
MediHelp rates the interaction as minor. Demeclocycline and Estradiol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Tetracyclines were once thought to reduce enterohepatic recycling of estrogens through gut flora changes. Studies have generally not shown meaningful decreases in estrogen levels, so clinical significance is doubtful.
How serious is the interaction between Demeclocycline and Estradiol?
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 action is needed. Counsel patients to report breakthrough bleeding, and consider a backup method if estradiol is used for contraception.
What other medicines interact with Estradiol?
MediHelp also lists interactions of Estradiol with, for example, Anastrozole, Fezolinetant, Ospemifene. The full list is on the Estradiol page.
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