Drug interactions
Carbamazepine + Estrogens, conjugated
Severity: Moderate
Carbamazepine and Estrogens, conjugated: moderate 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
Carbamazepine induces estrogen metabolism and can reduce estrogen exposure. Patients may have return of vasomotor symptoms or irregular bleeding.
What this interaction means in plain words
Carbamazepine and Estrogens, conjugated can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Carbamazepine belongs to Central Nervous System; Estrogens, conjugated belongs to Musculoskeletal.
Why it happens
CYP3A4 induction increases estrogen clearance.
What to do
Monitor clinical response and bleeding and titrate the estrogen dose upward if required. Readjust when carbamazepine is discontinued.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Estrogens, conjugated
Other interactions of Carbamazepine
- Artemether / lumefantrine + Carbamazepine Contraindicated
- Cabotegravir + Carbamazepine Contraindicated
- Carbamazepine + Delamanid Contraindicated
- Carbamazepine + Dienogest / estradiol valerate Contraindicated
- Carbamazepine + Doravirine Contraindicated
- Carbamazepine + Elbasvir / grazoprevir Contraindicated
Frequently asked questions
Can I take Carbamazepine with Estrogens, conjugated?
MediHelp rates the interaction as moderate. Carbamazepine and Estrogens, conjugated can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Carbamazepine induces estrogen metabolism and can reduce estrogen exposure. Patients may have return of vasomotor symptoms or irregular bleeding.
How serious is the interaction between Carbamazepine and Estrogens, conjugated?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor clinical response and bleeding and titrate the estrogen dose upward if required. Readjust when carbamazepine is discontinued.
What other medicines interact with Estrogens, conjugated?
MediHelp also lists interactions of Estrogens, conjugated with, for example, Itraconazole, Ketoconazole, Phenobarbitone. The full list is on the Estrogens, conjugated page.
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