Gait disturbances
Falls
Concentration
Cognitive deficits
Nausea without vomiting
Confusion
Headache
Vomiting
Cardiorespiratory distress
Abnormal and deep somnolence
Seizures
Coma (GCS <8)
CHF
Osmotic demyelination syndrome (central pontine myelinolysis)
Altered mental status
Dysphagia
Dysarthria
Paresis
Altered mental status
Dysphagia
Dysarthria
Paresis
Hyponatremia
Thiazide diuretic use
Hypernatremia
Na-wasting nephropathy 
Hypercapnia
Osmotic diuresis 
Hypermagnesemia
Aldosterone deficiency