Drug interactions
Brexpiprazole + Carbamazepine
Severity: Major
Brexpiprazole and Carbamazepine: major interaction.
Last updated Sources: US FDA label
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 is a strong CYP3A4 inducer and substantially reduces brexpiprazole concentrations. This can lead to loss of efficacy and relapse of psychiatric symptoms.
What this interaction means in plain words
Brexpiprazole and Carbamazepine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Brexpiprazole belongs to Central Nervous System; Carbamazepine belongs to Central Nervous System.
Why it happens
Carbamazepine induces CYP3A4, accelerating brexpiprazole metabolism.
What to do
Increase the brexpiprazole dose to about twice the usual dose over 1 to 2 weeks while on carbamazepine, and monitor response. Reduce back to the usual dose over 1 to 2 weeks if carbamazepine is stopped.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Brexpiprazole
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 Brexpiprazole with Carbamazepine?
MediHelp rates the interaction as major. Brexpiprazole and Carbamazepine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Carbamazepine is a strong CYP3A4 inducer and substantially reduces brexpiprazole concentrations. This can lead to loss of efficacy and relapse of psychiatric symptoms.
How serious is the interaction between Brexpiprazole and Carbamazepine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Increase the brexpiprazole dose to about twice the usual dose over 1 to 2 weeks while on carbamazepine, and monitor response. Reduce back to the usual dose over 1 to 2 weeks if carbamazepine is stopped.
What other medicines interact with Brexpiprazole?
MediHelp also lists interactions of Brexpiprazole with, for example, Alfentanil, Amisulpride, Apalutamide. The full list is on the Brexpiprazole page.
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