Hyperhydration. Hypotonic dehydration. Head trauma (1st 24 hr). Persistent hyperglycaemia not responding to insulin doses of up to 6 u/hr. Hyponatraemia. Acute CHF. Severe renal insufficiency w/ oligo- or anuria. Not to be used in paed patients w/ non-osmotic secretion of ADH (in pain, anxiety, post-op state, nausea, vomiting, pyrexia, sepsis, reduced circulating vol, resp disorders, CNS infections, metabolic & endocrine disorders).