Question: what is d5 1/2 ns?
Answer: D5W (5% dextrose in water), which consists of 278 mmol/L dextrose. D5NS (5% dextrose in normal saline), which, in addition, contains normal saline (0.9% w/v of NaCl). D5 1/2NS 5% dextrose in half amount of normal saline (0.45% w/v of NaCl).