This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epilepsy and EEG, Subject name: Medicine
All are used in early generalized convulsive status epilepticus (GCSE) treatment except? 
Select and explain. 
A. Phenobarbitone, B. Phenytoin, C. Lorazepam, D. Valproate
A: Phenobarbitone
Answer: A: Phenobarbitone 
Explanation: Phenobarbitone is not used for GCSE. Rxfor impending and early SE(5-30 min) IV Benzodiazepines: Lorazepam, Midazolam, Clonazepam IV anti-epileptics: Phenytoin, Valproate or Levetiracetam Rx for established and early refractory SE ( 30 min to 48 hours) IV Midazolam or Propofol Late refractory SE (>48 hours) Pentobarbital or Thiopental