How to reduce lamotrigine when an inducer is stopped

Question from a Member (emphasis added by us): I have a patient who is stabilized on lamotrigine. The dose was [at] 150 mg/day when she was started on rifampin for tuberculosis. I increased her lamotrigine to 300 mg/day. She is doing well with no side effects. Her rifampin is to be discontinued. How would you recommend…