POC glucose
CBC
Chemistry, Mg, CK
Lactic acid (may differentiate tonic-clonic from pseudoseizures and syncope)
Pregnancy test (female)
Urine toxicology screen
Consider LP (if SAH or meningitis/encephalitis is suspected)
Consider EKG if cardiac origin not ruled out
If patient has returned to a normal baseline: 
When feasible, perform a neuroimaging of the brain in the ED on patients with a<unk> 
Deferred outpatient neuroimaging may be used when reliable follow-up is available
First-time seizure
Idiopathic
Febrile seizure
Trauma 
Transient ischemic attack
Intracranial hemorrhage 
Psychogenic nonepileptic seizure
Structural CNS abnormalities