Answer
Yes. Oestrogen-containing HRT may lower lamotrigine concentrations and reduce seizure control; inform the prescriber managing lamotrigine before HRT is started, changed or stopped.
Sources for this answer
- Fem7 Conti, 50 micrograms / 7 micrograms / 24 hours, Transdermal patch — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.