Symptoms can be present 2-6 days after rapid correction of serum sodium
Dysarthria
Dysphagia
Lethargy
Behavioral disturbances/ confusion
Paraparesis or quadriparesis
Seizures
"Locked in" syndrome
Coma and death
Osmotic demyelination syndrome
Hypoxic encephalopathy
Limbic encephalitis
Acute toxic-metabolic encephalopathy 
Neoplastic meningitis
Hypoglycemia
Posterior reversible encephalopathy syndrome
Hyperosmolar state 