Drug interactions
Carbamazepine + Thalidomide
Severity: Major
Carbamazepine and Thalidomide: major 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 is an enzyme inducer that lowers hormonal contraceptive concentrations and can result in breakthrough ovulation. With thalidomide, contraceptive failure risks severe fetal malformations.
What this interaction means in plain words
Carbamazepine and Thalidomide 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 belongs to Central Nervous System; Thalidomide belongs to Miscellaneous.
Why it happens
CYP3A4 induction by carbamazepine accelerates metabolism of contraceptive hormones.
What to do
Do not rely on hormonal contraceptives; use a copper IUD or other non-hormonal highly effective method with a barrier method during and after carbamazepine.
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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Other interactions of Thalidomide
- Bortezomib + Thalidomide Major
- Griseofulvin + Thalidomide Major
- Modafinil + Thalidomide Major
- Nivolumab + Thalidomide Major
- Phenytoin + Thalidomide Major
- Rifabutin + Thalidomide Major
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 Thalidomide?
MediHelp rates the interaction as major. Carbamazepine and Thalidomide 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 an enzyme inducer that lowers hormonal contraceptive concentrations and can result in breakthrough ovulation. With thalidomide, contraceptive failure risks severe fetal malformations.
How serious is the interaction between Carbamazepine and Thalidomide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not rely on hormonal contraceptives; use a copper IUD or other non-hormonal highly effective method with a barrier method during and after carbamazepine.
What other medicines interact with Thalidomide?
MediHelp also lists interactions of Thalidomide with, for example, Bortezomib, Griseofulvin, Modafinil. The full list is on the Thalidomide page.
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