For pediatrics we occasionally need tiny doses such as 0.25 units of rapid acting insulin. Since we cannot draw up using an insulin syringe, we are evaluating the process of diluting insulin with the sterile diluent from the manufacturer. Something we have encountered is how to best order and discuss the dose, once diluted. In pharmacy we tend to think of 0.25 units as 0.01 mL (of 25 units/mL diluted insulin). When our Endocrinology team is reviewing with patients, they tend to refer to this same dose as “1 unit of diluted insulin” to visualize the marking on the insulin syringe. We are concerned about potential errors, and how to best safeguard. Would anyone be able to share their process with us?