EEG electroencephalogram EKG - electrocardiogram CT scan of the head w/o contrast CMP complete metabolic panel, CBC diff complete blood count with differential Thyroid studies TSH T3 T4 Metabolic/Inflammatory laboratory tests (in specific conditions) Urine Analysis with Urine Drug Screen within 48 hours of admission) Fe serum level Fibrin D-dimer Magnesium (Mg)