The healthcare provider prescribes cyanocobalamin injection 100 mcg IM every 3 days for a client with pernicious anemia. The vial is labeled, "1 mg/mL." How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

The nurse is to administer 100 mcg of cyanocobalamin. Please note that 1 mg is equivalent to 1000 mcg, so the concentration of the medication is 1000 mcg/mL. Therefore, the volume of medication to administer is: 100mcg / 1000mcg/mL ​= 0.1mL So, the nurse should administer 0.1 mL of cyanocobalamin