Valproate-CR contains valproate sodium in a controlled release form. You have not mentioned the weight of your child. Usual dose of valproate is 20 mg/kg/day which can be increased upto 40 mg/kg/day depending on whether seizure
is controlled or not.
In children above 20 kgs a tablet of 200 mg should be given two times a day. Your child is getting 300 mg twice a day that is also appropriate for her.
Children on long term use of valproate need to be investigated for liver
function test to monitor the side effects of valproate.