Table 1

Categories of insulin

Category label on Figs. 1, 2, and 5	Description	Delivery	Products—brand names^a	Products—generic names
Short-acting insulin (vials)	Short-acting, intermediate-acting, or mixed intermediate/ short-acting vials	Vial	Humulin R, 10-mL vial Humulin R, 3-mL vial Novolin R Novolin R (Relion) Humulin N, 10-mL vial Humulin N, 3-mL vial Novolin N Novolin N (Relion) Humulin 70/30 Novolin 70/30 Novolin 70/30 (Relion)	Insulin regular, human Insulin regular, human Insulin regular, human Insulin regular, human Insulin NPH, human isophane Insulin NPH, human isophane Insulin NPH, human isophane Insulin NPH, human isophane Insulin NPH, human/regular insulin HM Insulin NPH, human/regular insulin HM Insulin NPH, human/regular insulin HM
Rapid-acting insulin (vials)	Rapid-acting or mixed intermediate/rapid-acting vials	Vial	Humalog, 10-mL vial Humalog, 3-mL vial Apidra NovoLog Humalog Mix 75/25 Humalog Mix 50/50 NovoLog Mix 70/30	Insulin lispro Insulin lispro Insulin glulisine Insulin aspart Insulin lispro protamine/lispro Insulin lispro protamine/lispro Insulin aspart protamine & aspart
Rapid-acting insulin (pens)	Rapid-acting or mixed intermediate/ rapid-acting pens	Pen or cartridge	Humalog cartridge Humalog KwikPen U-100 Apidra SoloSTAR NovoLog cartridge NovoLog FlexPen Humalog Mix 75/25 KwikPen Humalog Mix 50/50 KwikPen NovoLog Mix 70/30 FlexPen	Insulin lispro Insulin lispro Insulin glulisine Insulin aspart Insulin aspart Insulin lispro protamine/lispro Insulin lispro protamine/lispro Insulin aspart protamine & aspart
Long-acting insulin (vials/pens)	Long-acting vials and pens	Vial or pen	Lantus Levemir Lantus SoloSTAR Levemir FlexPen	Insulin glargine Insulin detemir Insulin glargine Insulin detemir

Categories of insulin products evaluated by the USC Schaeffer Center for Health Policy & Economics investigators as part of the Insulin Access and Affordability Working Group.
↵^aIn the case of the Novo Nordisk products (Novolin R, Novolin N, Novolin 70/30), one is the Novo Nordisk–branded product, while the other corresponds to the same drug sold under the Relion brand. Each has a different national drug code and sells for a different price. In the case of the Eli Lilly products (Humulin R, Humulin N, Humalog), different vial sizes are referenced (3 mL vs. 10 mL).