Carbamazepine and Oral Contraceptive: Drug Interaction Guide

Quick answer: This is a major interaction — avoid combining Carbamazepine and Oral Contraceptive unless specifically directed by your doctor.

Interaction severity: Major — avoid combination

How Carbamazepine interacts with Oral Contraceptive

Carbamazepine induces CYP3A4 and UGT enzymes, increasing metabolism of ethinylestradiol and progestogens. This can reduce contraceptive efficacy and cause breakthrough bleeding.

What you should do

Use a non-hormonal or enzyme-inducer-resistant contraceptive method. Counsel patients about pregnancy risk and emergency contraception options.

Key facts

Severity

Major — avoid combination

Mechanism

Carbamazepine induces CYP3A4 and UGT enzymes, increasing metabolism of ethinylestradiol and progestogens. This can reduc...

Action

Use a non-hormonal or enzyme-inducer-resistant contraceptive method. Counsel patients about pregnancy risk and emergency...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Carbamazepine and Oral Contraceptive together?

No — this combination should generally be avoided. Use a non-hormonal or enzyme-inducer-resistant contraceptive method. Counsel patients about pregnancy risk and emergency contraception options.

What is the severity of this interaction?

The interaction between Carbamazepine and Oral Contraceptive is classified as Major — avoid combination. Carbamazepine induces CYP3A4 and UGT enzymes, increasing metabolism of ethinylestradiol and progestogens. This can reduce contraceptive efficacy and cause breakthrough bleeding.

What should I do if I'm prescribed both?

Use a non-hormonal or enzyme-inducer-resistant contraceptive method. Counsel patients about pregnancy risk and emergency contraception options. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.