How do you approach prescribing oxcarbazepine when the patient is on an oral contraceptive?

I first would want to ask what the reason is for oxcarbazepine and if there is a safer alternative for pregnancy. If it's for epilepsy, then I would go with lamotrigine. However, if the patient is stable on oxcarbazepine, then I would lower the dosage. I would strongly encourage an IUD, which is loc...