True  about use of anticonvulsants and OCPs in epileptic patient is all except
Metabolic interactions between anticonvulsants and combined hormonal contraceptives usually do not result in increased seizure activity except for Lamotrigine.
OCPs may reduce efficacy of anticonvulsants
Those on Lamotrigine monotherapy, combined OCPs are not recommended
Their metabolic interactions usually increase seizure activity
OCPs containing atleast 30ug ethinyl estradiol should be used