My son 2 y, has mitochondrial encephalopathy he is on lonazepam, keppra, (levetiracetam) biotin, miraqule, brain wise, calcifit, b long, the convulsion not controlled?

Intractable seizures: In mitochondrial encephalopathy generalized tonic-clonic seizures are generally amenable to traditional antiepileptic drugs, whereas if there is a myoclonus component, the myoclonus may be relatively refractory to treament and may develop into continuous generalized myoclonus. Have you been told if he also has myoclonic seizures?