Evaluate for dehydration
BMP
UA
Additional workup depending on history
Consider:
Urine osmolality, electrolytes
Serum osmolality
Serum ADH
Renal imaging
Urine osmolality, electrolytes
Serum osmolality
Serum ADH
Renal imaging
Polyuria
Osmotic diuresis
Dysuria
Hyperglycemia
Abnormally colored urine
Mannitol
Proteinuria
Drugs: diuretics, caffeine, acetazolamide, lithium