Drug interactions
Erythromycin + Estrogens conjugated synthetic
Severity: Minor
Erythromycin and Estrogens conjugated synthetic: 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
Erythromycin may modestly increase estrogen exposure by inhibiting CYP3A4. This could increase estrogenic adverse effects such as breast tenderness, fluid retention or bleeding irregularities.
What this interaction means in plain words
Erythromycin and Estrogens conjugated synthetic 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
CYP3A4 inhibition slows estrogen metabolism, increasing exposure.
What to do
No routine dose change is needed. Monitor for estrogen excess symptoms during a short erythromycin course.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Erythromycin and Estrogens conjugated synthetic, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Erythromycin
- Conivaptan + Erythromycin Contraindicated
- Dihydroergotamine intranasal + Erythromycin Contraindicated
- Dihydroergotamine + Erythromycin Contraindicated
- Domperidone + Erythromycin Contraindicated
- Dronedarone + Erythromycin Contraindicated
- Droperidol + Erythromycin Contraindicated
Frequently asked questions
Can I take Erythromycin with Estrogens conjugated synthetic?
MediHelp rates the interaction as minor. Erythromycin and Estrogens conjugated synthetic have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Erythromycin may modestly increase estrogen exposure by inhibiting CYP3A4. This could increase estrogenic adverse effects such as breast tenderness, fluid retention or bleeding irregularities.
How serious is the interaction between Erythromycin and Estrogens conjugated synthetic?
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 dose change is needed. Monitor for estrogen excess symptoms during a short erythromycin course.
What other medicines interact with Erythromycin?
MediHelp also lists interactions of Erythromycin with, for example, Conivaptan, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Erythromycin page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
