See hyponatremia
Fluid restriction
Oral salt tablets (NaCl) for mild-moderate hyponatremia
100 cc bolus of 3% NaCl for severe symptoms, repeat if neurologic symptoms persist or worsen
Ideally given through central line
DO NOT give normal saline 0.9%
In<unk> , sodium handling is intact and renal system will excrete Na
Water handling out of balance from excessive ADH
All sodium will be excreted, urine osmolality will remain high
Half of the bolus of normal saline will be retained, worsening hyponatremia
See osmotic demyelination<unk>  for excessively rapid overcorrection
Ideally given through central line
In<unk> , sodium handling is intact and renal system will excrete Na
Water handling out of balance from excessive ADH
All sodium will be excreted, urine osmolality will remain high
Half of the bolus of normal saline will be retained, worsening hyponatremia
Syndrome of inappropriate antidiuretic hormone secretion
Inappropriate or hypersecretion from hypothalamus
Adrenal crisis
Infectious
Thyrotoxic periodic paralysis
Brain abscess
Diabetic ketoacidosis
Encephalitis, meningitis