CBC
Chem 10
ABG
LFTs
Ammonemia
Acetaminophen level (rule out coingestion/alternate cause of liver failure)
ASA level (rule out overdose)
Fingerstick (can be hypoglycemic)
UDS
LP
ECG
EEG (coma)
Reye syndrome
Shaken baby syndrome
Wellens' syndrome
Head trauma
Kounis syndrome
Viral encephalitis
Irukandji syndrome
Meningitis