1 mL contains 100 IU human insulin (produced in E.coli by recombinant DNA technology).
Humulin N: Humulin N is a sterile suspension of a white, crystalline precipitate of isophane human insulin in an isotonic phosphate buffer.
KwikPen: The active substance is human insulin. Human insulin is made in the laboratory by a 'recombinant DNA technology' process. It has the same structure as the natural hormone made by the pancreas. It is therefore, different from animal insulins. The human insulin in Humulin N is available in a suspension together with protamine sulphate.
Humulin R: Humulin R is a sterile, clear, colourless, aqueous solution of human insulin.
Excipient/Inactive Ingredients: Humulin N: m-cresol, glycerol, phenol, protamine sulphate, dibasic sodium phosphate 7H2O, zinc oxide, water for injections.
Humulin R: m-cresol, glycerol, water for injections.
The following may be used to adjust pH: Hydrochloric acid and/or sodium hydroxide.