Insulin brand and generic names
These examples introduce several insulin types. They are not a complete list of insulin products or mixtures. The type headings describe the examples shown, not every formulation that shares an ingredient.
Rapid-acting insulin analogs
| Brand name | Generic name |
|---|---|
| Humalog | insulin lispro |
| NovoLog | insulin aspart |
Short- and intermediate-acting human insulin
| Brand name | Generic name |
|---|---|
| Humulin R U-100 | regular human insulin |
| Humulin N | isophane human insulin (NPH) |
Humulin R U-100 is a short-acting regular human insulin. Humulin N is intermediate-acting isophane human insulin, also called NPH insulin.
Long-acting insulin analogs
| Brand name | Generic name |
|---|---|
| Lantus / Basaglar / Toujeo | insulin glargine |
| Tresiba | insulin degludec |
Lantus, Basaglar, and Toujeo contain insulin glargine. Tresiba contains insulin degludec, often described as ultra-long-acting within the broader long-acting group.
Understanding insulin types
The first distinction is between human insulin and insulin analogs. Regular human insulin and NPH insulin belong to the first group. Lispro, aspart, glargine, and degludec are insulin analogs. These generic names distinguish ingredients; the brand gives you another part of the product’s identity.
For name study, connect Humalog—lispro and NovoLog—aspart with the rapid-acting group. Connect Lantus, Basaglar, and Toujeo—glargine, plus Tresiba—degludec, with the long-acting group. You can learn those associations without memorizing a timing chart in the same session.
NPH stands for neutral protamine Hagedorn and is another name used for isophane insulin. That terminology can make Humulin N look like it has two different generic identities in separate study resources. Learn “isophane human insulin” and “NPH insulin” together.
Concentrations and mixtures are part of the name
U-100, U-200, U-300, and U-500 describe concentrations in units per milliliter. They are not suffixes identifying an insulin class. Keep the concentration visible when the learning question concerns a specific product: Toujeo is insulin glargine U-300, while Lantus and Basaglar are insulin glargine U-100.
Humulin R also has a U-500 product with a different time-action profile from the U-100 example in this guide. Do not transfer the “short-acting U-100” label to every product called Humulin R.
Premixed insulin names add another layer: they identify combinations in specified proportions. A name that includes Mix or a ratio is not the same product name as the unmixed insulin. Read the complete label rather than dropping those qualifiers during practice.
Naming patterns and memory tips
Learn lispro and aspart as a pair of rapid-acting examples, then glargine and degludec as long-acting examples. The type is your first grouping cue; the brand–generic association remains a separate memory task.
For the human insulin examples, R can remind you of regular and N of NPH. Keep that cue tied to these specific names rather than treating a single letter as a universal naming system.
Practice both questions for glargine: “What ingredient is in Lantus?” and “Which listed brands contain insulin glargine?” The first has one generic answer; the second has several brand answers. That is a useful difference from one-brand study cards.
Commonly confused insulin names
Humalog and Humulin
Humalog pairs with insulin lispro. Humulin is a family name that needs its qualifier: R and N point to different human insulin preparations. Learn the whole brand, not just the opening syllable.
Lantus and other glargine brands
Lantus, Basaglar, and Toujeo share the ingredient insulin glargine, but that match does not establish identical concentration, delivery system, or interchangeability. The generic answer is one layer of the product identity.
Insulin and other diabetes injections
Not every injectable diabetes medication is insulin. Trulicity—dulaglutide and Mounjaro—tirzepatide belong to other drug classes. Organize by ingredient and class rather than by whether a product comes in a pen.