Combined Hormonal Contraceptives and Lamotrigine: Drug Interaction Guide

Quick answer: This combination requires caution. Combined Hormonal Contraceptives and Lamotrigine can be used together with adjustments and monitoring.

Interaction severity: Moderate — caution required

How Combined Hormonal Contraceptives interacts with Lamotrigine

Ethinylestradiol induces UGT1A4-mediated lamotrigine glucuronidation, lowering lamotrigine concentrations during active treatment and allowing concentrations to rebound during hormone-free intervals.

What you should do

Monitor clinical response and, when available, lamotrigine concentrations when contraception is started, stopped, or cycled. Adjust lamotrigine gradually and consider a contraceptive method without estrogen.

Key facts

Severity

Moderate — caution required

Mechanism

Ethinylestradiol induces UGT1A4-mediated lamotrigine glucuronidation, lowering lamotrigine concentrations during active ...

Action

Monitor clinical response and, when available, lamotrigine concentrations when contraception is started, stopped, or cyc...

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 Combined Hormonal Contraceptives and Lamotrigine together?

With caution. Monitor clinical response and, when available, lamotrigine concentrations when contraception is started, stopped, or cycled. Adjust lamotrigine gradually and consider a contraceptive method without estrogen.

What is the severity of this interaction?

The interaction between Combined Hormonal Contraceptives and Lamotrigine is classified as Moderate — caution required. Ethinylestradiol induces UGT1A4-mediated lamotrigine glucuronidation, lowering lamotrigine concentrations during active treatment and allowing concentrations to rebound during hormone-free intervals.

What should I do if I'm prescribed both?

Monitor clinical response and, when available, lamotrigine concentrations when contraception is started, stopped, or cycled. Adjust lamotrigine gradually and consider a contraceptive method without estrogen. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

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