Changing over to U-100 insulin

Abstract

A new preparation of insulin containing 100 units per millilitre (U-100) is being introduced in South Africa. Since it was first used in 1922, insulin has been available in at least eight different concentrations but, over the years, only the 40 U/ml and 80 U/ml have been in common usage, the 20 U/ml having a certain vogue in the United Kingdom only.