Drug interactions
Carbamazepine + Topiramate
Severity: Moderate
Carbamazepine and Topiramate: 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 lowers topiramate concentrations substantially through enzyme induction. Topiramate has little or no consistent effect on carbamazepine levels. Seizure control may be affected if either drug is started or stopped.
What this interaction means in plain words
Carbamazepine and Topiramate 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; Topiramate belongs to Central Nervous System.
Why it happens
Carbamazepine induces hepatic enzymes, increasing topiramate clearance.
What to do
Titrate topiramate to clinical response, allowing for higher doses. Reassess the dose if carbamazepine is withdrawn.
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 Carbamazepine
- Artemether / lumefantrine + Carbamazepine Contraindicated
- Cabotegravir + Carbamazepine Contraindicated
- Carbamazepine + Delamanid Contraindicated
- Carbamazepine + Dienogest / estradiol valerate Contraindicated
- Carbamazepine + Doravirine Contraindicated
- Carbamazepine + Elbasvir / grazoprevir Contraindicated
Other interactions of Topiramate
Frequently asked questions
Can I take Carbamazepine with Topiramate?
MediHelp rates the interaction as moderate. Carbamazepine and Topiramate 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 lowers topiramate concentrations substantially through enzyme induction. Topiramate has little or no consistent effect on carbamazepine levels. Seizure control may be affected if either drug is started or stopped.
How serious is the interaction between Carbamazepine and Topiramate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Titrate topiramate to clinical response, allowing for higher doses. Reassess the dose if carbamazepine is withdrawn.
What other medicines interact with Carbamazepine?
MediHelp also lists interactions of Carbamazepine with, for example, Artemether / lumefantrine, Cabotegravir, Delamanid. The full list is on the Carbamazepine page.
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