Inclusion Criteria:  Generalized convulsive status epilepticus, which is clinically defined at the time of presentation as continuous, generalized, tonic-clonic seizure activity or ≥ 2 generalized tonic-clonic seizures without recovery of consciousness for more than 5 minutes.  Exclusion Criteria:  Failure to obtain informed consent. Prior therapy with any anticonvulsant for the presenting episode of generalized convulsive status epilepticus. Epileptic patients on levetiracetam therapy. Known allergy or contraindications to any of the study drugs. End-stage kidney disease. Severe liver disease. Cardiac diseases. Hypoglycemia or hyperglycemia. Inborn errors of metabolism. Known mood/behavioral disorder. Failure to obtain intravenous access in the first 5 minutes. Cessation of seizures during the stabilization phase (0 - 5 minutes). Traumatic brain injury