I take Lamictal & it controls my tonic clonics. I was taking 200mg in the morn for a long time. Plus other meds. Then I started taking 50mg more when I took the 200mg because I still had CPs. It caused diplopia (double vision) so I went to 200mg in morn then 50mg in afternoon plus I still took 200mg at night (then added another 50mg).